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gtk2/gtk/gtklabel.c
Timm Bäder e7a326e230 label: Refactor get_layout_location() 
Rename a few local variables to be clearer about whether they belong to
the widget or to the layout.

Remove a workaround for an old bug that is no longer valid. We don't
underallocate the layout anymore. Aways center vertically, with respect
to the yalign.
2020-12-21 12:44:01 +01:00

5928 lines
175 KiB
C
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/* GTK - The GIMP Toolkit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.Free
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include "config.h"
#include "gtklabelprivate.h"
#include "gtkbuildable.h"
#include "gtkbuilderprivate.h"
#include "gtkcssstylepropertyprivate.h"
#include "gtkeventcontrollermotion.h"
#include "gtkeventcontrollerfocus.h"
#include "gtkgesturedrag.h"
#include "gtkgestureclick.h"
#include "gtkgesturesingle.h"
#include "gtkimage.h"
#include "gtkintl.h"
#include "gtkmain.h"
#include "gtkmarshalers.h"
#include "gtknotebook.h"
#include "gtkpango.h"
#include "gtkprivate.h"
#include "gtkshortcut.h"
#include "gtkshortcutcontroller.h"
#include "gtkshortcuttrigger.h"
#include "gtkshow.h"
#include "gtksnapshot.h"
#include "gtkstylecontextprivate.h"
#include "gtktextutil.h"
#include "gtktooltip.h"
#include "gtktypebuiltins.h"
#include "gtkwidgetprivate.h"
#include "gtkwindow.h"
#include "gtkpopovermenu.h"
#include "gtknative.h"
#include "gtkdragsource.h"
#include "gtkdragicon.h"
#include "gtkcsscolorvalueprivate.h"
#include <math.h>
#include <string.h>
/**
* SECTION:gtklabel
* @Short_description: A widget that displays a small to medium amount of text
* @Title: GtkLabel
*
* The #GtkLabel widget displays a small amount of text. As the name
* implies, most labels are used to label another widget such as a #GtkButton.
*
* # CSS nodes
*
* |[<!-- language="plain" -->
* label
* ├── [selection]
* ├── [link]
* ┊
* ╰── [link]
* ]|
*
* GtkLabel has a single CSS node with the name label. A wide variety
* of style classes may be applied to labels, such as .title, .subtitle,
* .dim-label, etc. In the #GtkShortcutsWindow, labels are used with the
* .keycap style class.
*
* If the label has a selection, it gets a subnode with name selection.
*
* If the label has links, there is one subnode per link. These subnodes
* carry the link or visited state depending on whether they have been
* visited. In this case, label node also gets a .link style class.
*
* # GtkLabel as GtkBuildable
*
* The GtkLabel implementation of the GtkBuildable interface supports a
* custom <attributes> element, which supports any number of <attribute>
* elements. The <attribute> element has attributes named “name“, “value“,
* “start“ and “end“ and allows you to specify #PangoAttribute values for
* this label.
*
* An example of a UI definition fragment specifying Pango attributes:
* |[
* <object class="GtkLabel">
* <attributes>
* <attribute name="weight" value="PANGO_WEIGHT_BOLD"/>
* <attribute name="background" value="red" start="5" end="10"/>
* </attributes>
* </object>
* ]|
*
* The start and end attributes specify the range of characters to which the
* Pango attribute applies. If start and end are not specified, the attribute is
* applied to the whole text. Note that specifying ranges does not make much
* sense with translatable attributes. Use markup embedded in the translatable
* content instead.
*
* # Accessibility
*
* GtkLabel uses the #GTK_ACCESSIBLE_ROLE_LABEL role.
*
* # Mnemonics
*
* Labels may contain “mnemonics”. Mnemonics are
* underlined characters in the label, used for keyboard navigation.
* Mnemonics are created by providing a string with an underscore before
* the mnemonic character, such as `"_File"`, to the
* functions gtk_label_new_with_mnemonic() or
* gtk_label_set_text_with_mnemonic().
*
* Mnemonics automatically activate any activatable widget the label is
* inside, such as a #GtkButton; if the label is not inside the
* mnemonic’s target widget, you have to tell the label about the target
* using gtk_label_set_mnemonic_widget(). Here’s a simple example where
* the label is inside a button:
*
* |[<!-- language="C" -->
* // Pressing Alt+H will activate this button
* GtkWidget *button = gtk_button_new ();
* GtkWidget *label = gtk_label_new_with_mnemonic ("_Hello");
* gtk_button_set_child (GTK_BUTTON (button), label);
* ]|
*
* There’s a convenience function to create buttons with a mnemonic label
* already inside:
*
* |[<!-- language="C" -->
* // Pressing Alt+H will activate this button
* GtkWidget *button = gtk_button_new_with_mnemonic ("_Hello");
* ]|
*
* To create a mnemonic for a widget alongside the label, such as a
* #GtkEntry, you have to point the label at the entry with
* gtk_label_set_mnemonic_widget():
*
* |[<!-- language="C" -->
* // Pressing Alt+H will focus the entry
* GtkWidget *entry = gtk_entry_new ();
* GtkWidget *label = gtk_label_new_with_mnemonic ("_Hello");
* gtk_label_set_mnemonic_widget (GTK_LABEL (label), entry);
* ]|
*
* # Markup (styled text)
*
* To make it easy to format text in a label (changing colors,
* fonts, etc.), label text can be provided in a simple
* [markup format][PangoMarkupFormat].
*
* Here’s how to create a label with a small font:
* |[<!-- language="C" -->
* GtkWidget *label = gtk_label_new (NULL);
* gtk_label_set_markup (GTK_LABEL (label), "<small>Small text</small>");
* ]|
*
* (See [complete documentation][PangoMarkupFormat] of available
* tags in the Pango manual.)
*
* The markup passed to gtk_label_set_markup() must be valid; for example,
* literal <, > and & characters must be escaped as &lt;, &gt;, and &amp;.
* If you pass text obtained from the user, file, or a network to
* gtk_label_set_markup(), you’ll want to escape it with
* g_markup_escape_text() or g_markup_printf_escaped().
*
* Markup strings are just a convenient way to set the #PangoAttrList on
* a label; gtk_label_set_attributes() may be a simpler way to set
* attributes in some cases. Be careful though; #PangoAttrList tends to
* cause internationalization problems, unless you’re applying attributes
* to the entire string (i.e. unless you set the range of each attribute
* to [0, %G_MAXINT)). The reason is that specifying the start_index and
* end_index for a #PangoAttribute requires knowledge of the exact string
* being displayed, so translations will cause problems.
*
* # Selectable labels
*
* Labels can be made selectable with gtk_label_set_selectable().
* Selectable labels allow the user to copy the label contents to
* the clipboard. Only labels that contain useful-to-copy information
* — such as error messages — should be made selectable.
*
* # Text layout # {#label-text-layout}
*
* A label can contain any number of paragraphs, but will have
* performance problems if it contains more than a small number.
* Paragraphs are separated by newlines or other paragraph separators
* understood by Pango.
*
* Labels can automatically wrap text if you call
* gtk_label_set_wrap().
*
* gtk_label_set_justify() sets how the lines in a label align
* with one another. If you want to set how the label as a whole
* aligns in its available space, see the #GtkWidget:halign and
* #GtkWidget:valign properties.
*
* The #GtkLabel:width-chars and #GtkLabel:max-width-chars properties
* can be used to control the size allocation of ellipsized or wrapped
* labels. For ellipsizing labels, if either is specified (and less
* than the actual text size), it is used as the minimum width, and the actual
* text size is used as the natural width of the label. For wrapping labels,
* width-chars is used as the minimum width, if specified, and max-width-chars
* is used as the natural width. Even if max-width-chars specified, wrapping
* labels will be rewrapped to use all of the available width.
*
* Note that the interpretation of #GtkLabel:width-chars and
* #GtkLabel:max-width-chars has changed a bit with the introduction of
* [width-for-height geometry management.][geometry-management]
*
* # Links
*
* GTK supports markup for clickable hyperlinks in addition
* to regular Pango markup. The markup for links is borrowed from HTML,
* using the `<a>` with “href“, “title“ and “class“ attributes. GTK renders links
* similar to the way they appear in web browsers, with colored, underlined
* text. The “title“ attribute is displayed as a tooltip on the link. The “class“
* attribute is used as style class on the CSS node for the link.
*
* An example looks like this:
*
* |[<!-- language="C" -->
* const char *text =
* "Go to the"
* "<a href=\"http://www.gtk.org title=\"&lt;i&gt;Our&lt;/i&gt; website\">"
* "GTK website</a> for more...";
* GtkWidget *label = gtk_label_new (NULL);
* gtk_label_set_markup (GTK_LABEL (label), text);
* ]|
*
* It is possible to implement custom handling for links and their tooltips with
* the #GtkLabel::activate-link signal and the gtk_label_get_current_uri() function.
*/
typedef struct _GtkLabelClass GtkLabelClass;
typedef struct _GtkLabelSelectionInfo GtkLabelSelectionInfo;
struct _GtkLabel
{
GtkWidget parent_instance;
GtkLabelSelectionInfo *select_info;
GtkWidget *mnemonic_widget;
GtkEventController *mnemonic_controller;
PangoAttrList *attrs;
PangoAttrList *markup_attrs;
PangoLayout *layout;
GtkWidget *popup_menu;
GMenuModel *extra_menu;
char *label;
char *text;
float xalign;
float yalign;
guint mnemonics_visible : 1;
guint jtype : 2;
guint wrap : 1;
guint use_underline : 1;
guint ellipsize : 3;
guint use_markup : 1;
guint wrap_mode : 3;
guint single_line_mode : 1;
guint in_click : 1;
guint track_links : 1;
guint mnemonic_keyval;
int width_chars;
int max_width_chars;
int lines;
};
struct _GtkLabelClass
{
GtkWidgetClass parent_class;
void (* move_cursor) (GtkLabel *self,
GtkMovementStep step,
int count,
gboolean extend_selection);
void (* copy_clipboard) (GtkLabel *self);
gboolean (*activate_link) (GtkLabel *self,
const char *uri);
};
/* Notes about the handling of links:
*
* Links share the GtkLabelSelectionInfo struct with selectable labels.
* There are some new fields for links. The links field contains the list
* of GtkLabelLink structs that describe the links which are embedded in
* the label. The active_link field points to the link under the mouse
* pointer. For keyboard navigation, the “focus” link is determined by
* finding the link which contains the selection_anchor position.
* The link_clicked field is used with button press and release events
* to ensure that pressing inside a link and releasing outside of it
* does not activate the link.
*
* Links are rendered with the #GTK_STATE_FLAG_LINK/#GTK_STATE_FLAG_VISITED
* state flags. When the mouse pointer is over a link, the pointer is changed
* to indicate the link.
*
* Labels with links accept keyboard focus, and it is possible to move
* the focus between the embedded links using Tab/Shift-Tab. The focus
* is indicated by a focus rectangle that is drawn around the link text.
* Pressing Enter activates the focused link, and there is a suitable
* context menu for links that can be opened with the Menu key. Pressing
* Control-C copies the link URI to the clipboard.
*
* In selectable labels with links, link functionality is only available
* when the selection is empty.
*/
typedef struct
{
char *uri;
char *title; /* the title attribute, used as tooltip */
GtkCssNode *cssnode;
gboolean visited; /* get set when the link is activated; this flag
* gets preserved over later set_markup() calls
*/
int start; /* position of the link in the PangoLayout */
int end;
} GtkLabelLink;
struct _GtkLabelSelectionInfo
{
int selection_anchor;
int selection_end;
GtkCssNode *selection_node;
GdkContentProvider *provider;
GtkLabelLink *links;
guint n_links;
GtkLabelLink *active_link;
GtkLabelLink *context_link;
GtkGesture *drag_gesture;
GtkGesture *click_gesture;
GtkEventController *motion_controller;
GtkEventController *focus_controller;
int drag_start_x;
int drag_start_y;
guint in_drag : 1;
guint select_words : 1;
guint selectable : 1;
guint link_clicked : 1;
};
enum {
MOVE_CURSOR,
COPY_CLIPBOARD,
ACTIVATE_LINK,
ACTIVATE_CURRENT_LINK,
LAST_SIGNAL
};
enum {
PROP_0,
PROP_LABEL,
PROP_ATTRIBUTES,
PROP_USE_MARKUP,
PROP_USE_UNDERLINE,
PROP_JUSTIFY,
PROP_WRAP,
PROP_WRAP_MODE,
PROP_SELECTABLE,
PROP_MNEMONIC_KEYVAL,
PROP_MNEMONIC_WIDGET,
PROP_ELLIPSIZE,
PROP_WIDTH_CHARS,
PROP_SINGLE_LINE_MODE,
PROP_MAX_WIDTH_CHARS,
PROP_LINES,
PROP_XALIGN,
PROP_YALIGN,
PROP_EXTRA_MENU,
NUM_PROPERTIES
};
static GParamSpec *label_props[NUM_PROPERTIES] = { NULL, };
static guint signals[LAST_SIGNAL] = { 0 };
static GQuark quark_mnemonics_visible_connected;
static void gtk_label_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_label_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gtk_label_finalize (GObject *object);
static void gtk_label_dispose (GObject *object);
static void gtk_label_size_allocate (GtkWidget *widget,
int width,
int height,
int baseline);
static void gtk_label_state_flags_changed (GtkWidget *widget,
GtkStateFlags prev_state);
static void gtk_label_css_changed (GtkWidget *widget,
GtkCssStyleChange *change);
static void gtk_label_snapshot (GtkWidget *widget,
GtkSnapshot *snapshot);
static gboolean gtk_label_focus (GtkWidget *widget,
GtkDirectionType direction);
static void gtk_label_unrealize (GtkWidget *widget);
static void gtk_label_motion (GtkEventControllerMotion *controller,
double x,
double y,
gpointer data);
static void gtk_label_leave (GtkEventControllerMotion *controller,
gpointer data);
static gboolean gtk_label_grab_focus (GtkWidget *widget);
static gboolean gtk_label_query_tooltip (GtkWidget *widget,
int x,
int y,
gboolean keyboard_tip,
GtkTooltip *tooltip);
static void gtk_label_set_text_internal (GtkLabel *self,
char *str);
static gboolean gtk_label_set_label_internal (GtkLabel *self,
const char *str);
static gboolean gtk_label_set_use_markup_internal (GtkLabel *self,
gboolean val);
static gboolean gtk_label_set_use_underline_internal (GtkLabel *self,
gboolean val);
static void gtk_label_set_markup_internal (GtkLabel *self,
const char *str,
gboolean with_uline);
static void gtk_label_recalculate (GtkLabel *self);
static void gtk_label_root (GtkWidget *widget);
static void gtk_label_unroot (GtkWidget *widget);
static void gtk_label_popup_menu (GtkWidget *widget,
const char *action_name,
GVariant *parameters);
static void gtk_label_do_popup (GtkLabel *self,
double x,
double y);
static void gtk_label_ensure_select_info (GtkLabel *self);
static void gtk_label_clear_select_info (GtkLabel *self);
static void gtk_label_update_cursor (GtkLabel *self);
static void gtk_label_clear_layout (GtkLabel *self);
static void gtk_label_ensure_layout (GtkLabel *self);
static void gtk_label_select_region_index (GtkLabel *self,
int anchor_index,
int end_index);
static void gtk_label_update_active_link (GtkWidget *widget,
double x,
double y);
static gboolean gtk_label_mnemonic_activate (GtkWidget *widget,
gboolean group_cycling);
static void gtk_label_setup_mnemonic (GtkLabel *self);
static void gtk_label_buildable_interface_init (GtkBuildableIface *iface);
static gboolean gtk_label_buildable_custom_tag_start (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const char *tagname,
GtkBuildableParser *parser,
gpointer *data);
static void gtk_label_buildable_custom_finished (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const char *tagname,
gpointer user_data);
/* For selectable labels: */
static void gtk_label_move_cursor (GtkLabel *self,
GtkMovementStep step,
int count,
gboolean extend_selection);
static void gtk_label_copy_clipboard (GtkLabel *self);
static void gtk_label_select_all (GtkLabel *self);
static int gtk_label_move_forward_word (GtkLabel *self,
int start);
static int gtk_label_move_backward_word (GtkLabel *self,
int start);
/* For links: */
static void gtk_label_clear_links (GtkLabel *self);
static gboolean gtk_label_activate_link (GtkLabel *self,
const char *uri);
static void gtk_label_activate_current_link (GtkLabel *self);
static void emit_activate_link (GtkLabel *self,
GtkLabelLink *link);
/* Event controller callbacks */
static void gtk_label_click_gesture_pressed (GtkGestureClick *gesture,
int n_press,
double x,
double y,
GtkLabel *self);
static void gtk_label_click_gesture_released (GtkGestureClick *gesture,
int n_press,
double x,
double y,
GtkLabel *self);
static void gtk_label_drag_gesture_begin (GtkGestureDrag *gesture,
double start_x,
double start_y,
GtkLabel *self);
static void gtk_label_drag_gesture_update (GtkGestureDrag *gesture,
double offset_x,
double offset_y,
GtkLabel *self);
/* Actions */
static void gtk_label_activate_clipboard_copy (GtkWidget *self,
const char *name,
GVariant *parameter);
static void gtk_label_activate_selection_select_all (GtkWidget *self,
const char *name,
GVariant *parameter);
static void gtk_label_activate_link_open (GtkWidget *self,
const char *name,
GVariant *parameter);
static void gtk_label_activate_link_copy (GtkWidget *self,
const char *name,
GVariant *parameter);
static void gtk_label_nop (GtkWidget *self,
const char *name,
GVariant *parameter);
static void gtk_label_update_actions (GtkLabel *self);
static GtkSizeRequestMode gtk_label_get_request_mode (GtkWidget *widget);
static void gtk_label_measure (GtkWidget *widget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline);
static GtkBuildableIface *buildable_parent_iface = NULL;
G_DEFINE_TYPE_WITH_CODE (GtkLabel, gtk_label, GTK_TYPE_WIDGET,
G_IMPLEMENT_INTERFACE (GTK_TYPE_BUILDABLE,
gtk_label_buildable_interface_init))
static void
add_move_binding (GtkWidgetClass *widget_class,
guint keyval,
guint modmask,
GtkMovementStep step,
int count)
{
g_return_if_fail ((modmask & GDK_SHIFT_MASK) == 0);
gtk_widget_class_add_binding_signal (widget_class,
keyval, modmask,
"move-cursor",
"(iib)", step, count, FALSE);
/* Selection-extending version */
gtk_widget_class_add_binding_signal (widget_class,
keyval, modmask | GDK_SHIFT_MASK,
"move-cursor",
"(iib)", step, count, TRUE);
}
static void
gtk_label_class_init (GtkLabelClass *class)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (class);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
gobject_class->set_property = gtk_label_set_property;
gobject_class->get_property = gtk_label_get_property;
gobject_class->finalize = gtk_label_finalize;
gobject_class->dispose = gtk_label_dispose;
widget_class->size_allocate = gtk_label_size_allocate;
widget_class->state_flags_changed = gtk_label_state_flags_changed;
widget_class->css_changed = gtk_label_css_changed;
widget_class->query_tooltip = gtk_label_query_tooltip;
widget_class->snapshot = gtk_label_snapshot;
widget_class->unrealize = gtk_label_unrealize;
widget_class->root = gtk_label_root;
widget_class->unroot = gtk_label_unroot;
widget_class->mnemonic_activate = gtk_label_mnemonic_activate;
widget_class->grab_focus = gtk_label_grab_focus;
widget_class->focus = gtk_label_focus;
widget_class->get_request_mode = gtk_label_get_request_mode;
widget_class->measure = gtk_label_measure;
class->move_cursor = gtk_label_move_cursor;
class->copy_clipboard = gtk_label_copy_clipboard;
class->activate_link = gtk_label_activate_link;
/**
* GtkLabel::move-cursor:
* @entry: the object which received the signal
* @step: the granularity of the move, as a #GtkMovementStep
* @count: the number of @step units to move
* @extend_selection: %TRUE if the move should extend the selection
*
* The ::move-cursor signal is a
* [keybinding signal][GtkSignalAction]
* which gets emitted when the user initiates a cursor movement.
* If the cursor is not visible in @entry, this signal causes
* the viewport to be moved instead.
*
* Applications should not connect to it, but may emit it with
* g_signal_emit_by_name() if they need to control the cursor
* programmatically.
*
* The default bindings for this signal come in two variants,
* the variant with the Shift modifier extends the selection,
* the variant without the Shift modifier does not.
* There are too many key combinations to list them all here.
* - Arrow keys move by individual characters/lines
* - Ctrl-arrow key combinations move by words/paragraphs
* - Home/End keys move to the ends of the buffer
*/
signals[MOVE_CURSOR] =
g_signal_new (I_("move-cursor"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkLabelClass, move_cursor),
NULL, NULL,
_gtk_marshal_VOID__ENUM_INT_BOOLEAN,
G_TYPE_NONE, 3,
GTK_TYPE_MOVEMENT_STEP,
G_TYPE_INT,
G_TYPE_BOOLEAN);
/**
* GtkLabel::copy-clipboard:
* @self: the object which received the signal
*
* The ::copy-clipboard signal is a
* [keybinding signal][GtkSignalAction]
* which gets emitted to copy the selection to the clipboard.
*
* The default binding for this signal is Ctrl-c.
*/
signals[COPY_CLIPBOARD] =
g_signal_new (I_("copy-clipboard"),
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkLabelClass, copy_clipboard),
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
/**
* GtkLabel::activate-current-link:
* @self: The label on which the signal was emitted
*
* A [keybinding signal][GtkSignalAction]
* which gets emitted when the user activates a link in the label.
*
* Applications may also emit the signal with g_signal_emit_by_name()
* if they need to control activation of URIs programmatically.
*
* The default bindings for this signal are all forms of the Enter key.
*/
signals[ACTIVATE_CURRENT_LINK] =
g_signal_new_class_handler (I_("activate-current-link"),
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_CALLBACK (gtk_label_activate_current_link),
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
/**
* GtkLabel::activate-link:
* @self: The label on which the signal was emitted
* @uri: the URI that is activated
*
* The signal which gets emitted to activate a URI.
* Applications may connect to it to override the default behaviour,
* which is to call gtk_show_uri().
*
* Returns: %TRUE if the link has been activated
*/
signals[ACTIVATE_LINK] =
g_signal_new (I_("activate-link"),
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkLabelClass, activate_link),
_gtk_boolean_handled_accumulator, NULL,
_gtk_marshal_BOOLEAN__STRING,
G_TYPE_BOOLEAN, 1, G_TYPE_STRING);
/**
* GtkLabel:label:
*
* The contents of the label.
*
* If the string contains [Pango XML markup][PangoMarkupFormat], you will
* have to set the #GtkLabel:use-markup property to %TRUE in order for the
* label to display the markup attributes. See also gtk_label_set_markup()
* for a convenience function that sets both this property and the
* #GtkLabel:use-markup property at the same time.
*
* If the string contains underlines acting as mnemonics, you will have to
* set the #GtkLabel:use-underline property to %TRUE in order for the label
* to display them.
*/
label_props[PROP_LABEL] =
g_param_spec_string ("label",
P_("Label"),
P_("The text of the label"),
"",
GTK_PARAM_READWRITE);
label_props[PROP_ATTRIBUTES] =
g_param_spec_boxed ("attributes",
P_("Attributes"),
P_("A list of style attributes to apply to the text of the label"),
PANGO_TYPE_ATTR_LIST,
GTK_PARAM_READWRITE);
label_props[PROP_USE_MARKUP] =
g_param_spec_boolean ("use-markup",
P_("Use markup"),
P_("The text of the label includes XML markup. See pango_parse_markup()"),
FALSE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
label_props[PROP_USE_UNDERLINE] =
g_param_spec_boolean ("use-underline",
P_("Use underline"),
P_("If set, an underline in the text indicates the next character should be used for the mnemonic accelerator key"),
FALSE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
label_props[PROP_JUSTIFY] =
g_param_spec_enum ("justify",
P_("Justification"),
P_("The alignment of the lines in the text of the label relative to each other. This does NOT affect the alignment of the label within its allocation. See GtkLabel:xalign for that"),
GTK_TYPE_JUSTIFICATION,
GTK_JUSTIFY_LEFT,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkLabel:xalign:
*
* The xalign property determines the horizontal alignment of the label text
* inside the labels size allocation. Compare this to #GtkWidget:halign,
* which determines how the labels size allocation is positioned in the
* space available for the label.
*/
label_props[PROP_XALIGN] =
g_param_spec_float ("xalign",
P_("X align"),
P_("The horizontal alignment, from 0 (left) to 1 (right). Reversed for RTL layouts."),
0.0, 1.0,
0.5,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkLabel:yalign:
*
* The yalign property determines the vertical alignment of the label text
* inside the labels size allocation. Compare this to #GtkWidget:valign,
* which determines how the labels size allocation is positioned in the
* space available for the label.
*/
label_props[PROP_YALIGN] =
g_param_spec_float ("yalign",
P_("Y align"),
P_("The vertical alignment, from 0 (top) to 1 (bottom)"),
0.0, 1.0,
0.5,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
label_props[PROP_WRAP] =
g_param_spec_boolean ("wrap",
P_("Line wrap"),
P_("If set, wrap lines if the text becomes too wide"),
FALSE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkLabel:wrap-mode:
*
* If line wrapping is on (see the #GtkLabel:wrap property) this controls
* how the line wrapping is done. The default is %PANGO_WRAP_WORD, which
* means wrap on word boundaries.
*/
label_props[PROP_WRAP_MODE] =
g_param_spec_enum ("wrap-mode",
P_("Line wrap mode"),
P_("If wrap is set, controls how linewrapping is done"),
PANGO_TYPE_WRAP_MODE,
PANGO_WRAP_WORD,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
label_props[PROP_SELECTABLE] =
g_param_spec_boolean ("selectable",
P_("Selectable"),
P_("Whether the label text can be selected with the mouse"),
FALSE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
label_props[PROP_MNEMONIC_KEYVAL] =
g_param_spec_uint ("mnemonic-keyval",
P_("Mnemonic key"),
P_("The mnemonic accelerator key for this label"),
0, G_MAXUINT,
GDK_KEY_VoidSymbol,
GTK_PARAM_READABLE);
label_props[PROP_MNEMONIC_WIDGET] =
g_param_spec_object ("mnemonic-widget",
P_("Mnemonic widget"),
P_("The widget to be activated when the label’s mnemonic key is pressed"),
GTK_TYPE_WIDGET,
GTK_PARAM_READWRITE);
/**
* GtkLabel:ellipsize:
*
* The preferred place to ellipsize the string, if the label does
* not have enough room to display the entire string, specified as a
* #PangoEllipsizeMode.
*
* Note that setting this property to a value other than
* %PANGO_ELLIPSIZE_NONE has the side-effect that the label requests
* only enough space to display the ellipsis "...". In particular, this
* means that ellipsizing labels do not work well in notebook tabs, unless
* the #GtkNotebook tab-expand child property is set to %TRUE. Other ways
* to set a label's width are gtk_widget_set_size_request() and
* gtk_label_set_width_chars().
*/
label_props[PROP_ELLIPSIZE] =
g_param_spec_enum ("ellipsize",
P_("Ellipsize"),
P_("The preferred place to ellipsize the string, if the label does not have enough room to display the entire string"),
PANGO_TYPE_ELLIPSIZE_MODE,
PANGO_ELLIPSIZE_NONE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkLabel:width-chars:
*
* The desired width of the label, in characters. If this property is set to
* -1, the width will be calculated automatically.
*
* See the section on [text layout][label-text-layout]
* for details of how #GtkLabel:width-chars and #GtkLabel:max-width-chars
* determine the width of ellipsized and wrapped labels.
**/
label_props[PROP_WIDTH_CHARS] =
g_param_spec_int ("width-chars",
P_("Width In Characters"),
P_("The desired width of the label, in characters"),
-1, G_MAXINT,
-1,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkLabel:single-line-mode:
*
* Whether the label is in single line mode. In single line mode,
* the height of the label does not depend on the actual text, it
* is always set to ascent + descent of the font. This can be an
* advantage in situations where resizing the label because of text
* changes would be distracting, e.g. in a statusbar.
**/
label_props[PROP_SINGLE_LINE_MODE] =
g_param_spec_boolean ("single-line-mode",
P_("Single Line Mode"),
P_("Whether the label is in single line mode"),
FALSE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkLabel:max-width-chars:
*
* The desired maximum width of the label, in characters. If this property
* is set to -1, the width will be calculated automatically.
*
* See the section on [text layout][label-text-layout]
* for details of how #GtkLabel:width-chars and #GtkLabel:max-width-chars
* determine the width of ellipsized and wrapped labels.
**/
label_props[PROP_MAX_WIDTH_CHARS] =
g_param_spec_int ("max-width-chars",
P_("Maximum Width In Characters"),
P_("The desired maximum width of the label, in characters"),
-1, G_MAXINT,
-1,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkLabel:lines:
*
* The number of lines to which an ellipsized, wrapping label
* should be limited. This property has no effect if the
* label is not wrapping or ellipsized. Set this property to
* -1 if you don't want to limit the number of lines.
*/
label_props[PROP_LINES] =
g_param_spec_int ("lines",
P_("Number of lines"),
P_("The desired number of lines, when ellipsizing a wrapping label"),
-1, G_MAXINT,
-1,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkLabel:extra-menu:
*
* A menu model whose contents will be appended to
* the context menu.
*/
label_props[PROP_EXTRA_MENU] =
g_param_spec_object ("extra-menu",
P_("Extra menu"),
P_("Menu model to append to the context menu"),
G_TYPE_MENU_MODEL,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
g_object_class_install_properties (gobject_class, NUM_PROPERTIES, label_props);
/**
* GtkLabel|menu.popup:
*
* Opens the context menu.
*/
gtk_widget_class_install_action (widget_class, "menu.popup", NULL, gtk_label_popup_menu);
/*
* Key bindings
*/
gtk_widget_class_add_binding_action (widget_class,
GDK_KEY_F10, GDK_SHIFT_MASK,
"menu.popup",
NULL);
gtk_widget_class_add_binding_action (widget_class,
GDK_KEY_Menu, 0,
"menu.popup",
NULL);
/* Moving the insertion point */
add_move_binding (widget_class, GDK_KEY_Right, 0,
GTK_MOVEMENT_VISUAL_POSITIONS, 1);
add_move_binding (widget_class, GDK_KEY_Left, 0,
GTK_MOVEMENT_VISUAL_POSITIONS, -1);
add_move_binding (widget_class, GDK_KEY_KP_Right, 0,
GTK_MOVEMENT_VISUAL_POSITIONS, 1);
add_move_binding (widget_class, GDK_KEY_KP_Left, 0,
GTK_MOVEMENT_VISUAL_POSITIONS, -1);
add_move_binding (widget_class, GDK_KEY_f, GDK_CONTROL_MASK,
GTK_MOVEMENT_LOGICAL_POSITIONS, 1);
add_move_binding (widget_class, GDK_KEY_b, GDK_CONTROL_MASK,
GTK_MOVEMENT_LOGICAL_POSITIONS, -1);
add_move_binding (widget_class, GDK_KEY_Right, GDK_CONTROL_MASK,
GTK_MOVEMENT_WORDS, 1);
add_move_binding (widget_class, GDK_KEY_Left, GDK_CONTROL_MASK,
GTK_MOVEMENT_WORDS, -1);
add_move_binding (widget_class, GDK_KEY_KP_Right, GDK_CONTROL_MASK,
GTK_MOVEMENT_WORDS, 1);
add_move_binding (widget_class, GDK_KEY_KP_Left, GDK_CONTROL_MASK,
GTK_MOVEMENT_WORDS, -1);
/* select all */
gtk_widget_class_add_binding (widget_class,
GDK_KEY_a, GDK_CONTROL_MASK,
(GtkShortcutFunc) gtk_label_select_all,
NULL);
gtk_widget_class_add_binding (widget_class,
GDK_KEY_slash, GDK_CONTROL_MASK,
(GtkShortcutFunc) gtk_label_select_all,
NULL);
/* unselect all */
gtk_widget_class_add_binding_signal (widget_class,
GDK_KEY_a, GDK_SHIFT_MASK | GDK_CONTROL_MASK,
"move-cursor",
"(iib)", GTK_MOVEMENT_PARAGRAPH_ENDS, 0, FALSE);
gtk_widget_class_add_binding_signal (widget_class,
GDK_KEY_backslash, GDK_CONTROL_MASK,
"move-cursor",
"(iib)", GTK_MOVEMENT_PARAGRAPH_ENDS, 0, FALSE);
add_move_binding (widget_class, GDK_KEY_f, GDK_ALT_MASK,
GTK_MOVEMENT_WORDS, 1);
add_move_binding (widget_class, GDK_KEY_b, GDK_ALT_MASK,
GTK_MOVEMENT_WORDS, -1);
add_move_binding (widget_class, GDK_KEY_Home, 0,
GTK_MOVEMENT_DISPLAY_LINE_ENDS, -1);
add_move_binding (widget_class, GDK_KEY_End, 0,
GTK_MOVEMENT_DISPLAY_LINE_ENDS, 1);
add_move_binding (widget_class, GDK_KEY_KP_Home, 0,
GTK_MOVEMENT_DISPLAY_LINE_ENDS, -1);
add_move_binding (widget_class, GDK_KEY_KP_End, 0,
GTK_MOVEMENT_DISPLAY_LINE_ENDS, 1);
add_move_binding (widget_class, GDK_KEY_Home, GDK_CONTROL_MASK,
GTK_MOVEMENT_BUFFER_ENDS, -1);
add_move_binding (widget_class, GDK_KEY_End, GDK_CONTROL_MASK,
GTK_MOVEMENT_BUFFER_ENDS, 1);
add_move_binding (widget_class, GDK_KEY_KP_Home, GDK_CONTROL_MASK,
GTK_MOVEMENT_BUFFER_ENDS, -1);
add_move_binding (widget_class, GDK_KEY_KP_End, GDK_CONTROL_MASK,
GTK_MOVEMENT_BUFFER_ENDS, 1);
/* copy */
gtk_widget_class_add_binding_signal (widget_class,
GDK_KEY_c, GDK_CONTROL_MASK,
"copy-clipboard",
NULL);
gtk_widget_class_add_binding_signal (widget_class,
GDK_KEY_Return, 0,
"activate-current-link",
NULL);
gtk_widget_class_add_binding_signal (widget_class,
GDK_KEY_ISO_Enter, 0,
"activate-current-link",
NULL);
gtk_widget_class_add_binding_signal (widget_class,
GDK_KEY_KP_Enter, 0,
"activate-current-link",
NULL);
gtk_widget_class_set_css_name (widget_class, I_("label"));
gtk_widget_class_set_accessible_role (widget_class, GTK_ACCESSIBLE_ROLE_LABEL);
quark_mnemonics_visible_connected = g_quark_from_static_string ("gtk-label-mnemonics-visible-connected");
/**
* GtkLabel|clipboard.cut:
*
* Doesn't do anything, since text in labels can't be deleted.
*/
gtk_widget_class_install_action (widget_class, "clipboard.cut", NULL,
gtk_label_nop);
/**
* GtkLabel|clipboard.copy:
*
* Copies the text to the clipboard.
*/
gtk_widget_class_install_action (widget_class, "clipboard.copy", NULL,
gtk_label_activate_clipboard_copy);
/**
* GtkLabel|clipboard.paste:
*
* Doesn't do anything, since text in labels can't be edited.
*/
gtk_widget_class_install_action (widget_class, "clipboard.paste", NULL,
gtk_label_nop);
/**
* GtkLabel|selection.delete:
*
* Doesn't do anything, since text in labels can't be deleted.
*/
gtk_widget_class_install_action (widget_class, "selection.delete", NULL,
gtk_label_nop);
/**
* GtkLabel|selection.select-all:
*
* Selects all of the text, if the label allows selection.
*/
gtk_widget_class_install_action (widget_class, "selection.select-all", NULL,
gtk_label_activate_selection_select_all);
/**
* GtkLabel|link.open:
*
* Opens the link, when activated on a link inside the label.
*/
gtk_widget_class_install_action (widget_class, "link.open", NULL,
gtk_label_activate_link_open);
/**
* GtkLabel|link.copy:
*
* Copies the link to the clipboard, when activated on a link
* inside the label.
*/
gtk_widget_class_install_action (widget_class, "link.copy", NULL,
gtk_label_activate_link_copy);
}
static void
gtk_label_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkLabel *self = GTK_LABEL (object);
switch (prop_id)
{
case PROP_LABEL:
gtk_label_set_label (self, g_value_get_string (value));
break;
case PROP_ATTRIBUTES:
gtk_label_set_attributes (self, g_value_get_boxed (value));
break;
case PROP_USE_MARKUP:
gtk_label_set_use_markup (self, g_value_get_boolean (value));
break;
case PROP_USE_UNDERLINE:
gtk_label_set_use_underline (self, g_value_get_boolean (value));
break;
case PROP_JUSTIFY:
gtk_label_set_justify (self, g_value_get_enum (value));
break;
case PROP_WRAP:
gtk_label_set_wrap (self, g_value_get_boolean (value));
break;
case PROP_WRAP_MODE:
gtk_label_set_wrap_mode (self, g_value_get_enum (value));
break;
case PROP_SELECTABLE:
gtk_label_set_selectable (self, g_value_get_boolean (value));
break;
case PROP_MNEMONIC_WIDGET:
gtk_label_set_mnemonic_widget (self, (GtkWidget*) g_value_get_object (value));
break;
case PROP_ELLIPSIZE:
gtk_label_set_ellipsize (self, g_value_get_enum (value));
break;
case PROP_WIDTH_CHARS:
gtk_label_set_width_chars (self, g_value_get_int (value));
break;
case PROP_SINGLE_LINE_MODE:
gtk_label_set_single_line_mode (self, g_value_get_boolean (value));
break;
case PROP_MAX_WIDTH_CHARS:
gtk_label_set_max_width_chars (self, g_value_get_int (value));
break;
case PROP_LINES:
gtk_label_set_lines (self, g_value_get_int (value));
break;
case PROP_XALIGN:
gtk_label_set_xalign (self, g_value_get_float (value));
break;
case PROP_YALIGN:
gtk_label_set_yalign (self, g_value_get_float (value));
break;
case PROP_EXTRA_MENU:
gtk_label_set_extra_menu (self, g_value_get_object (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_label_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkLabel *self = GTK_LABEL (object);
switch (prop_id)
{
case PROP_LABEL:
g_value_set_string (value, self->label);
break;
case PROP_ATTRIBUTES:
g_value_set_boxed (value, self->attrs);
break;
case PROP_USE_MARKUP:
g_value_set_boolean (value, self->use_markup);
break;
case PROP_USE_UNDERLINE:
g_value_set_boolean (value, self->use_underline);
break;
case PROP_JUSTIFY:
g_value_set_enum (value, self->jtype);
break;
case PROP_WRAP:
g_value_set_boolean (value, self->wrap);
break;
case PROP_WRAP_MODE:
g_value_set_enum (value, self->wrap_mode);
break;
case PROP_SELECTABLE:
g_value_set_boolean (value, gtk_label_get_selectable (self));
break;
case PROP_MNEMONIC_KEYVAL:
g_value_set_uint (value, self->mnemonic_keyval);
break;
case PROP_MNEMONIC_WIDGET:
g_value_set_object (value, (GObject*) self->mnemonic_widget);
break;
case PROP_ELLIPSIZE:
g_value_set_enum (value, self->ellipsize);
break;
case PROP_WIDTH_CHARS:
g_value_set_int (value, gtk_label_get_width_chars (self));
break;
case PROP_SINGLE_LINE_MODE:
g_value_set_boolean (value, gtk_label_get_single_line_mode (self));
break;
case PROP_MAX_WIDTH_CHARS:
g_value_set_int (value, gtk_label_get_max_width_chars (self));
break;
case PROP_LINES:
g_value_set_int (value, gtk_label_get_lines (self));
break;
case PROP_XALIGN:
g_value_set_float (value, gtk_label_get_xalign (self));
break;
case PROP_YALIGN:
g_value_set_float (value, gtk_label_get_yalign (self));
break;
case PROP_EXTRA_MENU:
g_value_set_object (value, gtk_label_get_extra_menu (self));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_label_init (GtkLabel *self)
{
self->width_chars = -1;
self->max_width_chars = -1;
self->label = g_strdup ("");
self->lines = -1;
self->xalign = 0.5;
self->yalign = 0.5;
self->jtype = GTK_JUSTIFY_LEFT;
self->wrap = FALSE;
self->wrap_mode = PANGO_WRAP_WORD;
self->ellipsize = PANGO_ELLIPSIZE_NONE;
self->use_underline = FALSE;
self->use_markup = FALSE;
self->mnemonic_keyval = GDK_KEY_VoidSymbol;
self->layout = NULL;
self->text = g_strdup ("");
self->attrs = NULL;
self->mnemonic_widget = NULL;
self->mnemonics_visible = FALSE;
}
static void
gtk_label_buildable_interface_init (GtkBuildableIface *iface)
{
buildable_parent_iface = g_type_interface_peek_parent (iface);
iface->custom_tag_start = gtk_label_buildable_custom_tag_start;
iface->custom_finished = gtk_label_buildable_custom_finished;
}
static const GtkBuildableParser pango_parser =
{
gtk_pango_attribute_start_element,
};
static gboolean
gtk_label_buildable_custom_tag_start (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const char *tagname,
GtkBuildableParser *parser,
gpointer *data)
{
if (buildable_parent_iface->custom_tag_start (buildable, builder, child,
tagname, parser, data))
return TRUE;
if (strcmp (tagname, "attributes") == 0)
{
GtkPangoAttributeParserData *parser_data;
parser_data = g_slice_new0 (GtkPangoAttributeParserData);
parser_data->builder = g_object_ref (builder);
parser_data->object = (GObject *) g_object_ref (buildable);
*parser = pango_parser;
*data = parser_data;
return TRUE;
}
return FALSE;
}
static void
gtk_label_buildable_custom_finished (GtkBuildable *buildable,
GtkBuilder *builder,
GObject *child,
const char *tagname,
gpointer user_data)
{
GtkPangoAttributeParserData *data = user_data;
buildable_parent_iface->custom_finished (buildable, builder, child,
tagname, user_data);
if (strcmp (tagname, "attributes") == 0)
{
if (data->attrs)
{
gtk_label_set_attributes (GTK_LABEL (buildable), data->attrs);
pango_attr_list_unref (data->attrs);
}
g_object_unref (data->object);
g_object_unref (data->builder);
g_slice_free (GtkPangoAttributeParserData, data);
}
}
/**
* gtk_label_new:
* @str: (nullable): The text of the label
*
* Creates a new label with the given text inside it. You can
* pass %NULL to get an empty label widget.
*
* Returns: the new #GtkLabel
**/
GtkWidget*
gtk_label_new (const char *str)
{
GtkLabel *self;
self = g_object_new (GTK_TYPE_LABEL, NULL);
if (str && *str)
gtk_label_set_text (self, str);
return GTK_WIDGET (self);
}
/**
* gtk_label_new_with_mnemonic:
* @str: (nullable): The text of the label, with an underscore in front of the
* mnemonic character
*
* Creates a new #GtkLabel, containing the text in @str.
*
* If characters in @str are preceded by an underscore, they are
* underlined. If you need a literal underscore character in a label, use
* '__' (two underscores). The first underlined character represents a
* keyboard accelerator called a mnemonic. The mnemonic key can be used
* to activate another widget, chosen automatically, or explicitly using
* gtk_label_set_mnemonic_widget().
*
* If gtk_label_set_mnemonic_widget() is not called, then the first
* activatable ancestor of the #GtkLabel will be chosen as the mnemonic
* widget. For instance, if the label is inside a button or menu item,
* the button or menu item will automatically become the mnemonic widget
* and be activated by the mnemonic.
*
* Returns: the new #GtkLabel
**/
GtkWidget*
gtk_label_new_with_mnemonic (const char *str)
{
GtkLabel *self;
self = g_object_new (GTK_TYPE_LABEL, NULL);
if (str && *str)
gtk_label_set_text_with_mnemonic (self, str);
return GTK_WIDGET (self);
}
static gboolean
gtk_label_mnemonic_activate (GtkWidget *widget,
gboolean group_cycling)
{
GtkLabel *self = GTK_LABEL (widget);
GtkWidget *parent;
if (self->mnemonic_widget)
return gtk_widget_mnemonic_activate (self->mnemonic_widget, group_cycling);
/* Try to find the widget to activate by traversing the
* widget's ancestry.
*/
parent = gtk_widget_get_parent (widget);
if (GTK_IS_NOTEBOOK (parent))
return FALSE;
while (parent)
{
if (gtk_widget_get_can_focus (parent) ||
(!group_cycling && gtk_widget_can_activate (parent)) ||
GTK_IS_NOTEBOOK (gtk_widget_get_parent (parent)))
return gtk_widget_mnemonic_activate (parent, group_cycling);
parent = gtk_widget_get_parent (parent);
}
/* barf if there was nothing to activate */
g_warning ("Couldn't find a target for a mnemonic activation.");
gtk_widget_error_bell (widget);
return FALSE;
}
static void
label_mnemonics_visible_changed (GtkWidget *widget,
GParamSpec *pspec,
gpointer data)
{
gboolean visible;
g_object_get (widget, "mnemonics-visible", &visible, NULL);
_gtk_label_mnemonics_visible_apply_recursively (widget, visible);
}
static void
gtk_label_setup_mnemonic (GtkLabel *self)
{
GtkWidget *widget = GTK_WIDGET (self);
GtkShortcut *shortcut;
GtkNative *native;
gboolean connected;
gboolean mnemonics_visible;
if (self->mnemonic_keyval == GDK_KEY_VoidSymbol)
{
if (self->mnemonic_controller)
{
gtk_widget_remove_controller (widget, self->mnemonic_controller);
self->mnemonic_controller = NULL;
}
return;
}
if (self->mnemonic_controller == NULL)
{
self->mnemonic_controller = gtk_shortcut_controller_new ();
gtk_event_controller_set_propagation_phase (self->mnemonic_controller, GTK_PHASE_CAPTURE);
gtk_shortcut_controller_set_scope (GTK_SHORTCUT_CONTROLLER (self->mnemonic_controller), GTK_SHORTCUT_SCOPE_MANAGED);
shortcut = gtk_shortcut_new (gtk_mnemonic_trigger_new (self->mnemonic_keyval),
g_object_ref (gtk_mnemonic_action_get ()));
gtk_shortcut_controller_add_shortcut (GTK_SHORTCUT_CONTROLLER (self->mnemonic_controller), shortcut);
gtk_widget_add_controller (GTK_WIDGET (self), self->mnemonic_controller);
}
else
{
shortcut = g_list_model_get_item (G_LIST_MODEL (self->mnemonic_controller), 0);
gtk_shortcut_set_trigger (shortcut, gtk_mnemonic_trigger_new (self->mnemonic_keyval));
g_object_unref (shortcut);
}
/* Connect to notify::mnemonics-visible of the root */
native = gtk_widget_get_native (GTK_WIDGET (self));
if (!GTK_IS_WINDOW (native) && !GTK_IS_POPOVER (native))
return;
/* always set up this widgets initial value */
g_object_get (native, "mnemonics-visible", &mnemonics_visible, NULL);
self->mnemonics_visible = mnemonics_visible;
connected =
GPOINTER_TO_INT (g_object_get_qdata (G_OBJECT (native), quark_mnemonics_visible_connected));
if (!connected)
{
g_signal_connect (native,
"notify::mnemonics-visible",
G_CALLBACK (label_mnemonics_visible_changed),
self);
g_object_set_qdata (G_OBJECT (native),
quark_mnemonics_visible_connected,
GINT_TO_POINTER (1));
}
}
static void
gtk_label_root (GtkWidget *widget)
{
GtkLabel *self = GTK_LABEL (widget);
GTK_WIDGET_CLASS (gtk_label_parent_class)->root (widget);
gtk_label_setup_mnemonic (self);
/* The PangoContext is replaced when the display changes, so clear the layouts */
gtk_label_clear_layout (GTK_LABEL (widget));
}
static void
gtk_label_unroot (GtkWidget *widget)
{
GtkLabel *self = GTK_LABEL (widget);
gtk_label_setup_mnemonic (self);
GTK_WIDGET_CLASS (gtk_label_parent_class)->unroot (widget);
}
void
_gtk_label_mnemonics_visible_apply_recursively (GtkWidget *widget,
gboolean visible)
{
if (GTK_IS_LABEL (widget))
{
GtkLabel *self = GTK_LABEL (widget);
if (self->mnemonics_visible != visible)
{
self->mnemonics_visible = visible;
gtk_label_recalculate (self);
}
}
else
{
GtkWidget *child;
for (child = gtk_widget_get_first_child (widget);
child;
child = gtk_widget_get_next_sibling (child))
{
if (GTK_IS_NATIVE (child))
continue;
_gtk_label_mnemonics_visible_apply_recursively (child, visible);
}
}
}
static void
label_mnemonic_widget_weak_notify (gpointer data,
GObject *where_the_object_was)
{
GtkLabel *self = data;
self->mnemonic_widget = NULL;
g_object_notify_by_pspec (G_OBJECT (self), label_props[PROP_MNEMONIC_WIDGET]);
}
/**
* gtk_label_set_mnemonic_widget:
* @self: a #GtkLabel
* @widget: (nullable): the target #GtkWidget, or %NULL to unset
*
* If the label has been set so that it has a mnemonic key (using
* i.e. gtk_label_set_markup_with_mnemonic(),
* gtk_label_set_text_with_mnemonic(), gtk_label_new_with_mnemonic()
* or the “use_underline” property) the label can be associated with a
* widget that is the target of the mnemonic. When the label is inside
* a widget (like a #GtkButton or a #GtkNotebook tab) it is
* automatically associated with the correct widget, but sometimes
* (i.e. when the target is a #GtkEntry next to the label) you need to
* set it explicitly using this function.
*
* The target widget will be accelerated by emitting the
* GtkWidget::mnemonic-activate signal on it. The default handler for
* this signal will activate the widget if there are no mnemonic collisions
* and toggle focus between the colliding widgets otherwise.
**/
void
gtk_label_set_mnemonic_widget (GtkLabel *self,
GtkWidget *widget)
{
g_return_if_fail (GTK_IS_LABEL (self));
if (widget)
g_return_if_fail (GTK_IS_WIDGET (widget));
if (self->mnemonic_widget)
{
gtk_widget_remove_mnemonic_label (self->mnemonic_widget, GTK_WIDGET (self));
g_object_weak_unref (G_OBJECT (self->mnemonic_widget),
label_mnemonic_widget_weak_notify,
self);
}
self->mnemonic_widget = widget;
if (self->mnemonic_widget)
{
g_object_weak_ref (G_OBJECT (self->mnemonic_widget),
label_mnemonic_widget_weak_notify,
self);
gtk_widget_add_mnemonic_label (self->mnemonic_widget, GTK_WIDGET (self));
}
g_object_notify_by_pspec (G_OBJECT (self), label_props[PROP_MNEMONIC_WIDGET]);
}
/**
* gtk_label_get_mnemonic_widget:
* @self: a #GtkLabel
*
* Retrieves the target of the mnemonic (keyboard shortcut) of this
* label. See gtk_label_set_mnemonic_widget().
*
* Returns: (nullable) (transfer none): the target of the label’s mnemonic,
* or %NULL if none has been set and the default algorithm will be used.
**/
GtkWidget *
gtk_label_get_mnemonic_widget (GtkLabel *self)
{
g_return_val_if_fail (GTK_IS_LABEL (self), NULL);
return self->mnemonic_widget;
}
/**
* gtk_label_get_mnemonic_keyval:
* @self: a #GtkLabel
*
* If the label has been set so that it has a mnemonic key this function
* returns the keyval used for the mnemonic accelerator. If there is no
* mnemonic set up it returns #GDK_KEY_VoidSymbol.
*
* Returns: GDK keyval usable for accelerators, or #GDK_KEY_VoidSymbol
**/
guint
gtk_label_get_mnemonic_keyval (GtkLabel *self)
{
g_return_val_if_fail (GTK_IS_LABEL (self), GDK_KEY_VoidSymbol);
return self->mnemonic_keyval;
}
static void
gtk_label_set_text_internal (GtkLabel *self,
char *str)
{
if (g_strcmp0 (self->text, str) == 0)
{
g_free (str);
return;
}
g_free (self->text);
self->text = str;
gtk_accessible_update_property (GTK_ACCESSIBLE (self),
GTK_ACCESSIBLE_PROPERTY_LABEL, self->text,
-1);
gtk_label_select_region_index (self, 0, 0);
}
static gboolean
gtk_label_set_label_internal (GtkLabel *self,
const char *str)
{
if (g_strcmp0 (str, self->label) == 0)
return FALSE;
g_free (self->label);
self->label = g_strdup (str ? str : "");
g_object_notify_by_pspec (G_OBJECT (self), label_props[PROP_LABEL]);
return TRUE;
}
static gboolean
gtk_label_set_use_markup_internal (GtkLabel *self,
gboolean val)
{
if (self->use_markup != val)
{
self->use_markup = val;
g_object_notify_by_pspec (G_OBJECT (self), label_props[PROP_USE_MARKUP]);
return TRUE;
}
return FALSE;
}
static gboolean
gtk_label_set_use_underline_internal (GtkLabel *self,
gboolean val)
{
if (self->use_underline != val)
{
self->use_underline = val;
g_object_notify_by_pspec (G_OBJECT (self), label_props[PROP_USE_UNDERLINE]);
return TRUE;
}
return FALSE;
}
/* Calculates text, attrs and mnemonic_keyval from
* label, use_underline and use_markup
*/
static void
gtk_label_recalculate (GtkLabel *self)
{
guint keyval = self->mnemonic_keyval;
gtk_label_clear_links (self);
gtk_label_clear_layout (self);
gtk_label_clear_select_info (self);
if (self->use_markup || self->use_underline)
gtk_label_set_markup_internal (self, self->label, self->use_underline);
else
{
g_clear_pointer (&self->markup_attrs, pango_attr_list_unref);
gtk_label_set_text_internal (self, g_strdup (self->label));
}
if (!self->use_underline)
self->mnemonic_keyval = GDK_KEY_VoidSymbol;
if (keyval != self->mnemonic_keyval)
{
gtk_label_setup_mnemonic (self);
g_object_notify_by_pspec (G_OBJECT (self), label_props[PROP_MNEMONIC_KEYVAL]);
}
gtk_widget_queue_resize (GTK_WIDGET (self));
}
/**
* gtk_label_set_text:
* @self: a #GtkLabel
* @str: The text you want to set
*
* Sets the text within the #GtkLabel widget. It overwrites any text that
* was there before.
*
* This function will clear any previously set mnemonic accelerators, and
* set the #GtkLabel:use-underline property to %FALSE as a side effect.
*
* This function will set the #GtkLabel:use-markup property to %FALSE
* as a side effect.
*
* See also: gtk_label_set_markup()
**/
void
gtk_label_set_text (GtkLabel *self,
const char *str)
{
gboolean changed;
g_return_if_fail (GTK_IS_LABEL (self));
g_object_freeze_notify (G_OBJECT (self));
changed = gtk_label_set_label_internal (self, str);
changed = gtk_label_set_use_markup_internal (self, FALSE) || changed;
changed = gtk_label_set_use_underline_internal (self, FALSE) || changed;
if (changed)
gtk_label_recalculate (self);
g_object_thaw_notify (G_OBJECT (self));
}
/**
* gtk_label_set_attributes:
* @self: a #GtkLabel
* @attrs: (nullable): a #PangoAttrList, or %NULL
*
* Sets a #PangoAttrList; the attributes in the list are applied to the
* label text.
*
* The attributes set with this function will be applied
* and merged with any other attributes previously effected by way
* of the #GtkLabel:use-underline or #GtkLabel:use-markup properties.
* While it is not recommended to mix markup strings with manually set
* attributes, if you must; know that the attributes will be applied
* to the label after the markup string is parsed.
**/
void
gtk_label_set_attributes (GtkLabel *self,
PangoAttrList *attrs)
{
g_return_if_fail (GTK_IS_LABEL (self));
if (!attrs && !self->attrs)
return;
if (attrs)
pango_attr_list_ref (attrs);
if (self->attrs)
pango_attr_list_unref (self->attrs);
self->attrs = attrs;
g_object_notify_by_pspec (G_OBJECT (self), label_props[PROP_ATTRIBUTES]);
gtk_label_clear_layout (self);
gtk_widget_queue_resize (GTK_WIDGET (self));
}
/**
* gtk_label_get_attributes:
* @self: a #GtkLabel
*
* Gets the attribute list that was set on the label using
* gtk_label_set_attributes(), if any. This function does
* not reflect attributes that come from the labels markup
* (see gtk_label_set_markup()). If you want to get the
* effective attributes for the label, use
* pango_layout_get_attribute (gtk_label_get_layout (self)).
*
* Returns: (nullable) (transfer none): the attribute list, or %NULL
* if none was set.
**/
PangoAttrList *
gtk_label_get_attributes (GtkLabel *self)
{
g_return_val_if_fail (GTK_IS_LABEL (self), NULL);
return self->attrs;
}
/**
* gtk_label_set_label:
* @self: a #GtkLabel
* @str: the new text to set for the label
*
* Sets the text of the label. The label is interpreted as
* including embedded underlines and/or Pango markup depending
* on the values of the #GtkLabel:use-underline and
* #GtkLabel:use-markup properties.
**/
void
gtk_label_set_label (GtkLabel *self,
const char *str)
{
g_return_if_fail (GTK_IS_LABEL (self));
g_object_freeze_notify (G_OBJECT (self));
if (gtk_label_set_label_internal (self, str))
gtk_label_recalculate (self);
g_object_thaw_notify (G_OBJECT (self));
}
/**
* gtk_label_get_label:
* @self: a #GtkLabel
*
* Fetches the text from a label widget including any embedded
* underlines indicating mnemonics and Pango markup. (See
* gtk_label_get_text()).
*
* Returns: the text of the label widget. This string is
* owned by the widget and must not be modified or freed.
**/
const char *
gtk_label_get_label (GtkLabel *self)
{
g_return_val_if_fail (GTK_IS_LABEL (self), NULL);
return self->label;
}
typedef struct
{
GtkLabel *label;
GArray *links;
GString *new_str;
gsize text_len;
} UriParserData;
static void
start_element_handler (GMarkupParseContext *context,
const char *element_name,
const char **attribute_names,
const char **attribute_values,
gpointer user_data,
GError **error)
{
UriParserData *pdata = user_data;
GtkLabel *self = pdata->label;
if (strcmp (element_name, "a") == 0)
{
GtkLabelLink link;
const char *uri = NULL;
const char *title = NULL;
const char *class = NULL;
gboolean visited = FALSE;
int line_number;
int char_number;
int i;
GtkCssNode *widget_node;
GtkStateFlags state;
g_markup_parse_context_get_position (context, &line_number, &char_number);
for (i = 0; attribute_names[i] != NULL; i++)
{
const char *attr = attribute_names[i];
if (strcmp (attr, "href") == 0)
uri = attribute_values[i];
else if (strcmp (attr, "title") == 0)
title = attribute_values[i];
else if (strcmp (attr, "class") == 0)
class = attribute_values[i];
else
{
g_set_error (error,
G_MARKUP_ERROR,
G_MARKUP_ERROR_UNKNOWN_ATTRIBUTE,
"Attribute '%s' is not allowed on the <a> tag "
"on line %d char %d",
attr, line_number, char_number);
return;
}
}
if (uri == NULL)
{
g_set_error (error,
G_MARKUP_ERROR,
G_MARKUP_ERROR_INVALID_CONTENT,
"Attribute 'href' was missing on the <a> tag "
"on line %d char %d",
line_number, char_number);
return;
}
visited = FALSE;
if (self->select_info)
{
for (i = 0; i < self->select_info->n_links; i++)
{
const GtkLabelLink *l = &self->select_info->links[i];
if (strcmp (uri, l->uri) == 0)
{
visited = l->visited;
break;
}
}
}
if (!pdata->links)
pdata->links = g_array_new (FALSE, TRUE, sizeof (GtkLabelLink));
link.uri = g_strdup (uri);
link.title = g_strdup (title);
widget_node = gtk_widget_get_css_node (GTK_WIDGET (pdata->label));
link.cssnode = gtk_css_node_new ();
gtk_css_node_set_name (link.cssnode, g_quark_from_static_string ("link"));
gtk_css_node_set_parent (link.cssnode, widget_node);
if (class)
gtk_css_node_add_class (link.cssnode, g_quark_from_string (class));
state = gtk_css_node_get_state (widget_node);
if (visited)
state |= GTK_STATE_FLAG_VISITED;
else
state |= GTK_STATE_FLAG_LINK;
gtk_css_node_set_state (link.cssnode, state);
g_object_unref (link.cssnode);
link.visited = visited;
link.start = pdata->text_len;
g_array_append_val (pdata->links, link);
}
else
{
int i;
g_string_append_c (pdata->new_str, '<');
g_string_append (pdata->new_str, element_name);
for (i = 0; attribute_names[i] != NULL; i++)
{
const char *attr = attribute_names[i];
const char *value = attribute_values[i];
char *newvalue;
newvalue = g_markup_escape_text (value, -1);
g_string_append_c (pdata->new_str, ' ');
g_string_append (pdata->new_str, attr);
g_string_append (pdata->new_str, "=\"");
g_string_append (pdata->new_str, newvalue);
g_string_append_c (pdata->new_str, '\"');
g_free (newvalue);
}
g_string_append_c (pdata->new_str, '>');
}
}
static void
end_element_handler (GMarkupParseContext *context,
const char *element_name,
gpointer user_data,
GError **error)
{
UriParserData *pdata = user_data;
if (!strcmp (element_name, "a"))
{
GtkLabelLink *link = &g_array_index (pdata->links, GtkLabelLink, pdata->links->len - 1);
link->end = pdata->text_len;
}
else
{
g_string_append (pdata->new_str, "</");
g_string_append (pdata->new_str, element_name);
g_string_append_c (pdata->new_str, '>');
}
}
static void
text_handler (GMarkupParseContext *context,
const char *text,
gsize text_len,
gpointer user_data,
GError **error)
{
UriParserData *pdata = user_data;
char *newtext;
newtext = g_markup_escape_text (text, text_len);
g_string_append (pdata->new_str, newtext);
pdata->text_len += text_len;
g_free (newtext);
}
static const GMarkupParser markup_parser =
{
start_element_handler,
end_element_handler,
text_handler,
NULL,
NULL
};
static gboolean
xml_isspace (char c)
{
return (c == ' ' || c == '\t' || c == '\n' || c == '\r');
}
static void
link_free (GtkLabelLink *link)
{
gtk_css_node_set_parent (link->cssnode, NULL);
g_free (link->uri);
g_free (link->title);
}
static gboolean
parse_uri_markup (GtkLabel *self,
const char *str,
char **new_str,
GtkLabelLink **links,
guint *out_n_links,
GError **error)
{
GMarkupParseContext *context;
const char *p, *end;
gsize length;
UriParserData pdata;
length = strlen (str);
p = str;
end = str + length;
pdata.label = self;
pdata.links = NULL;
pdata.new_str = g_string_sized_new (length);
pdata.text_len = 0;
while (p != end && xml_isspace (*p))
p++;
context = g_markup_parse_context_new (&markup_parser, 0, &pdata, NULL);
if (end - p >= 8 && strncmp (p, "<markup>", 8) == 0)
{
if (!g_markup_parse_context_parse (context, str, length, error))
goto failed;
}
else
{
if (!g_markup_parse_context_parse (context, "<markup>", 8, error))
goto failed;
if (!g_markup_parse_context_parse (context, str, length, error))
goto failed;
if (!g_markup_parse_context_parse (context, "</markup>", 9, error))
goto failed;
}
if (!g_markup_parse_context_end_parse (context, error))
goto failed;
g_markup_parse_context_free (context);
*new_str = g_string_free (pdata.new_str, FALSE);
if (pdata.links)
{
*out_n_links = pdata.links->len;
*links = (GtkLabelLink *)g_array_free (pdata.links, FALSE);
}
else
{
*links = NULL;
}
return TRUE;
failed:
g_markup_parse_context_free (context);
g_string_free (pdata.new_str, TRUE);
if (pdata.links)
g_array_free (pdata.links, TRUE);
return FALSE;
}
static void
gtk_label_ensure_has_tooltip (GtkLabel *self)
{
guint i;
gboolean has_tooltip = FALSE;
for (i = 0; i < self->select_info->n_links; i++)
{
const GtkLabelLink *link = &self->select_info->links[i];
if (link->title)
{
has_tooltip = TRUE;
break;
}
}
gtk_widget_set_has_tooltip (GTK_WIDGET (self), has_tooltip);
}
/* Reads @text and extracts the accel key, if any.
* @new_text will be set to the given text with the first _ removed.
*
* Returned will be the one underline attribute used for the mnemonic
* */
static void
extract_mnemonic_keyval (const char *text,
guint *out_accel_key,
char **out_new_text,
PangoAttribute **out_mnemonic_attribute)
{
const gsize text_len = strlen (text);
gunichar c;
const char *p;
p = text;
for (;;)
{
const char *_index;
c = g_utf8_get_char (p);
if (c == '\0')
break;
if (c != '_')
{
p = g_utf8_next_char (p);
continue;
}
_index = p;
p = g_utf8_next_char (p);
c = g_utf8_get_char (p);
if (c != '_' && c != '\0')
{
const gsize byte_index = p - text - 1; /* Of the _ */
/* c is the accel key */
if (out_accel_key)
*out_accel_key = gdk_keyval_to_lower (gdk_unicode_to_keyval (c));
if (out_new_text)
{
*out_new_text = g_malloc (text_len);
memcpy (*out_new_text, text, byte_index);
memcpy (*out_new_text + byte_index, p, text_len - byte_index);
}
if (out_mnemonic_attribute)
{
PangoAttribute *attr = pango_attr_underline_new (PANGO_UNDERLINE_LOW);
attr->start_index = _index - text;
attr->end_index = p - text;
*out_mnemonic_attribute = attr;
}
return;
}
p = g_utf8_next_char (p);
}
/* No accel key found */
if (out_accel_key)
*out_accel_key = GDK_KEY_VoidSymbol;
if (out_new_text)
*out_new_text = NULL;
if (out_mnemonic_attribute)
*out_mnemonic_attribute = NULL;
}
static void
gtk_label_set_markup_internal (GtkLabel *self,
const char *str,
gboolean with_uline)
{
char *text = NULL;
GError *error = NULL;
PangoAttrList *attrs = NULL;
char *str_for_display = NULL;
GtkLabelLink *links = NULL;
guint n_links = 0;
PangoAttribute *mnemonic_attr = NULL;
if (!parse_uri_markup (self, str, &str_for_display, &links, &n_links, &error))
goto error_set;
if (links)
{
gtk_label_ensure_select_info (self);
self->select_info->links = g_steal_pointer (&links);
self->select_info->n_links = n_links;
gtk_label_ensure_has_tooltip (self);
gtk_widget_add_css_class (GTK_WIDGET (self), "link");
}
if (!with_uline)
{
no_uline:
/* Extract the text to display */
if (!pango_parse_markup (str_for_display, -1, 0, &attrs, &text, NULL, &error))
goto error_set;
}
else /* Underline AND markup is a little more complicated... */
{
char *new_text = NULL;
guint accel_keyval;
gboolean auto_mnemonics = TRUE;
gboolean do_mnemonics = self->mnemonics_visible &&
(!auto_mnemonics || gtk_widget_is_sensitive (GTK_WIDGET (self))) &&
(!self->mnemonic_widget || gtk_widget_is_sensitive (self->mnemonic_widget));
/* Remove the mnemonic underline */
extract_mnemonic_keyval (str_for_display,
&accel_keyval,
&new_text,
NULL);
if (!new_text) /* No underline found anyway */
goto no_uline;
self->mnemonic_keyval = accel_keyval;
/* Extract the text to display */
if (!pango_parse_markup (new_text, -1, '_',
do_mnemonics ? &attrs : NULL, &text, NULL, &error))
goto error_set;
if (do_mnemonics)
{
/* text is now the final text, but we need to parse str_for_display once again
* *with* the mnemonic underline so we can remove the markup tags and get the
* proper attribute indices */
char *text_for_accel;
if (!pango_parse_markup (str_for_display, -1, 0, NULL, &text_for_accel, NULL, &error))
{
g_free (new_text);
goto error_set;
}
extract_mnemonic_keyval (text_for_accel,
NULL,
NULL,
&mnemonic_attr);
g_free (text_for_accel);
}
g_free (new_text);
}
g_free (str_for_display);
if (text)
gtk_label_set_text_internal (self, text);
g_clear_pointer (&self->markup_attrs, pango_attr_list_unref);
self->markup_attrs = attrs;
if (mnemonic_attr)
pango_attr_list_insert_before (self->markup_attrs, mnemonic_attr);
return;
error_set:
g_warning ("Failed to set text '%s' from markup due to error parsing markup: %s",
str, error->message);
g_error_free (error);
}
/**
* gtk_label_set_markup:
* @self: a #GtkLabel
* @str: a markup string (see [Pango markup format][PangoMarkupFormat])
*
* Parses @str which is marked up with the
* [Pango text markup language][PangoMarkupFormat], setting the
* label’s text and attribute list based on the parse results.
*
* If the @str is external data, you may need to escape it with
* g_markup_escape_text() or g_markup_printf_escaped():
*
* |[<!-- language="C" -->
* GtkWidget *self = gtk_label_new (NULL);
* const char *str = "...";
* const char *format = "<span style=\"italic\">\%s</span>";
* char *markup;
*
* markup = g_markup_printf_escaped (format, str);
* gtk_label_set_markup (GTK_LABEL (self), markup);
* g_free (markup);
* ]|
*
* This function will set the #GtkLabel:use-markup property to %TRUE as
* a side effect.
*
* If you set the label contents using the #GtkLabel:label property you
* should also ensure that you set the #GtkLabel:use-markup property
* accordingly.
*
* See also: gtk_label_set_text()
**/
void
gtk_label_set_markup (GtkLabel *self,
const char *str)
{
gboolean changed;
g_return_if_fail (GTK_IS_LABEL (self));
g_object_freeze_notify (G_OBJECT (self));
changed = gtk_label_set_label_internal (self, str);
changed = gtk_label_set_use_markup_internal (self, TRUE) || changed;
changed = gtk_label_set_use_underline_internal (self, FALSE) || changed;
if (changed)
gtk_label_recalculate (self);
g_object_thaw_notify (G_OBJECT (self));
}
/**
* gtk_label_set_markup_with_mnemonic:
* @self: a #GtkLabel
* @str: a markup string (see
* [Pango markup format][PangoMarkupFormat])
*
* Parses @str which is marked up with the
* [Pango text markup language][PangoMarkupFormat],
* setting the label’s text and attribute list based on the parse results.
* If characters in @str are preceded by an underscore, they are underlined
* indicating that they represent a keyboard accelerator called a mnemonic.
*
* The mnemonic key can be used to activate another widget, chosen
* automatically, or explicitly using gtk_label_set_mnemonic_widget().
*/
void
gtk_label_set_markup_with_mnemonic (GtkLabel *self,
const char *str)
{
gboolean changed;
g_return_if_fail (GTK_IS_LABEL (self));
g_object_freeze_notify (G_OBJECT (self));
changed = gtk_label_set_label_internal (self, str);
changed = gtk_label_set_use_markup_internal (self, TRUE) || changed;
changed = gtk_label_set_use_underline_internal (self, TRUE) || changed;
if (changed)
gtk_label_recalculate (self);
g_object_thaw_notify (G_OBJECT (self));
}
/**
* gtk_label_get_text:
* @self: a #GtkLabel
*
* Fetches the text from a label widget, as displayed on the
* screen. This does not include any embedded underlines
* indicating mnemonics or Pango markup. (See gtk_label_get_label())
*
* Returns: the text in the label widget. This is the internal
* string used by the label, and must not be modified.
**/
const char *
gtk_label_get_text (GtkLabel *self)
{
g_return_val_if_fail (GTK_IS_LABEL (self), NULL);
return self->text;
}
/**
* gtk_label_set_justify:
* @self: a #GtkLabel
* @jtype: a #GtkJustification
*
* Sets the alignment of the lines in the text of the label relative to
* each other. %GTK_JUSTIFY_LEFT is the default value when the widget is
* first created with gtk_label_new(). If you instead want to set the
* alignment of the label as a whole, use gtk_widget_set_halign() instead.
* gtk_label_set_justify() has no effect on labels containing only a
* single line.
*/
void
gtk_label_set_justify (GtkLabel *self,
GtkJustification jtype)
{
g_return_if_fail (GTK_IS_LABEL (self));
g_return_if_fail (jtype >= GTK_JUSTIFY_LEFT && jtype <= GTK_JUSTIFY_FILL);
if ((GtkJustification) self->jtype != jtype)
{
self->jtype = jtype;
/* No real need to be this drastic, but easier than duplicating the code */
gtk_label_clear_layout (self);
g_object_notify_by_pspec (G_OBJECT (self), label_props[PROP_JUSTIFY]);
gtk_widget_queue_resize (GTK_WIDGET (self));
}
}
/**
* gtk_label_get_justify:
* @self: a #GtkLabel
*
* Returns the justification of the label. See gtk_label_set_justify().
*
* Returns: #GtkJustification
**/
GtkJustification
gtk_label_get_justify (GtkLabel *self)
{
g_return_val_if_fail (GTK_IS_LABEL (self), 0);
return self->jtype;
}
/**
* gtk_label_set_ellipsize:
* @self: a #GtkLabel
* @mode: a #PangoEllipsizeMode
*
* Sets the mode used to ellipsize (add an ellipsis: "...") to the text
* if there is not enough space to render the entire string.
**/
void
gtk_label_set_ellipsize (GtkLabel *self,
PangoEllipsizeMode mode)
{
g_return_if_fail (GTK_IS_LABEL (self));
g_return_if_fail (mode >= PANGO_ELLIPSIZE_NONE && mode <= PANGO_ELLIPSIZE_END);
if ((PangoEllipsizeMode) self->ellipsize != mode)
{
self->ellipsize = mode;
/* No real need to be this drastic, but easier than duplicating the code */
gtk_label_clear_layout (self);
g_object_notify_by_pspec (G_OBJECT (self), label_props[PROP_ELLIPSIZE]);
gtk_widget_queue_resize (GTK_WIDGET (self));
}
}
/**
* gtk_label_get_ellipsize:
* @self: a #GtkLabel
*
* Returns the ellipsizing position of the label. See gtk_label_set_ellipsize().
*
* Returns: #PangoEllipsizeMode
**/
PangoEllipsizeMode
gtk_label_get_ellipsize (GtkLabel *self)
{
g_return_val_if_fail (GTK_IS_LABEL (self), PANGO_ELLIPSIZE_NONE);
return self->ellipsize;
}
/**
* gtk_label_set_width_chars:
* @self: a #GtkLabel
* @n_chars: the new desired width, in characters.
*
* Sets the desired width in characters of @label to @n_chars.
**/
void
gtk_label_set_width_chars (GtkLabel *self,
int n_chars)
{
g_return_if_fail (GTK_IS_LABEL (self));
if (self->width_chars != n_chars)
{
self->width_chars = n_chars;
g_object_notify_by_pspec (G_OBJECT (self), label_props[PROP_WIDTH_CHARS]);
gtk_widget_queue_resize (GTK_WIDGET (self));
}
}
/**
* gtk_label_get_width_chars:
* @self: a #GtkLabel
*
* Retrieves the desired width of @label, in characters. See
* gtk_label_set_width_chars().
*
* Returns: the width of the label in characters.
**/
int
gtk_label_get_width_chars (GtkLabel *self)
{
g_return_val_if_fail (GTK_IS_LABEL (self), -1);
return self->width_chars;
}
/**
* gtk_label_set_max_width_chars:
* @self: a #GtkLabel
* @n_chars: the new desired maximum width, in characters.
*
* Sets the desired maximum width in characters of @label to @n_chars.
**/
void
gtk_label_set_max_width_chars (GtkLabel *self,
int n_chars)
{
g_return_if_fail (GTK_IS_LABEL (self));
if (self->max_width_chars != n_chars)
{
self->max_width_chars = n_chars;
g_object_notify_by_pspec (G_OBJECT (self), label_props[PROP_MAX_WIDTH_CHARS]);
gtk_widget_queue_resize (GTK_WIDGET (self));
}
}
/**
* gtk_label_get_max_width_chars:
* @self: a #GtkLabel
*
* Retrieves the desired maximum width of @label, in characters. See
* gtk_label_set_width_chars().
*
* Returns: the maximum width of the label in characters.
**/
int
gtk_label_get_max_width_chars (GtkLabel *self)
{
g_return_val_if_fail (GTK_IS_LABEL (self), -1);
return self->max_width_chars;
}
/**
* gtk_label_set_wrap:
* @self: a #GtkLabel
* @wrap: the setting
*
* Toggles line wrapping within the #GtkLabel widget. %TRUE makes it break
* lines if text exceeds the widget’s size. %FALSE lets the text get cut off
* by the edge of the widget if it exceeds the widget size.
*
* Note that setting line wrapping to %TRUE does not make the label
* wrap at its parent container’s width, because GTK widgets
* conceptually can’t make their requisition depend on the parent
* container’s size. For a label that wraps at a specific position,
* set the label’s width using gtk_widget_set_size_request().
**/
void
gtk_label_set_wrap (GtkLabel *self,
gboolean wrap)
{
g_return_if_fail (GTK_IS_LABEL (self));
wrap = wrap != FALSE;
if (self->wrap != wrap)
{
self->wrap = wrap;
gtk_label_clear_layout (self);
gtk_widget_queue_resize (GTK_WIDGET (self));
g_object_notify_by_pspec (G_OBJECT (self), label_props[PROP_WRAP]);
}
}
/**
* gtk_label_get_wrap:
* @self: a #GtkLabel
*
* Returns whether lines in the label are automatically wrapped.
* See gtk_label_set_wrap().
*
* Returns: %TRUE if the lines of the label are automatically wrapped.
*/
gboolean
gtk_label_get_wrap (GtkLabel *self)
{
g_return_val_if_fail (GTK_IS_LABEL (self), FALSE);
return self->wrap;
}
/**
* gtk_label_set_wrap_mode:
* @self: a #GtkLabel
* @wrap_mode: the line wrapping mode
*
* If line wrapping is on (see gtk_label_set_wrap()) this controls how
* the line wrapping is done. The default is %PANGO_WRAP_WORD which means
* wrap on word boundaries.
**/
void
gtk_label_set_wrap_mode (GtkLabel *self,
PangoWrapMode wrap_mode)
{
g_return_if_fail (GTK_IS_LABEL (self));
if (self->wrap_mode != wrap_mode)
{
self->wrap_mode = wrap_mode;
g_object_notify_by_pspec (G_OBJECT (self), label_props[PROP_WRAP_MODE]);
gtk_widget_queue_resize (GTK_WIDGET (self));
}
}
/**
* gtk_label_get_wrap_mode:
* @self: a #GtkLabel
*
* Returns line wrap mode used by the label. See gtk_label_set_wrap_mode().
*
* Returns: %TRUE if the lines of the label are automatically wrapped.
*/
PangoWrapMode
gtk_label_get_wrap_mode (GtkLabel *self)
{
g_return_val_if_fail (GTK_IS_LABEL (self), FALSE);
return self->wrap_mode;
}
static void
gtk_label_dispose (GObject *object)
{
GtkLabel *self = GTK_LABEL (object);
gtk_label_set_mnemonic_widget (self, NULL);
G_OBJECT_CLASS (gtk_label_parent_class)->dispose (object);
}
static void
gtk_label_finalize (GObject *object)
{
GtkLabel *self = GTK_LABEL (object);
g_free (self->label);
g_free (self->text);
g_clear_object (&self->layout);
g_clear_pointer (&self->attrs, pango_attr_list_unref);
g_clear_pointer (&self->markup_attrs, pango_attr_list_unref);
if (self->select_info)
g_object_unref (self->select_info->provider);
gtk_label_clear_links (self);
g_free (self->select_info);
g_clear_pointer (&self->popup_menu, gtk_widget_unparent);
g_clear_object (&self->extra_menu);
G_OBJECT_CLASS (gtk_label_parent_class)->finalize (object);
}
static void
gtk_label_clear_layout (GtkLabel *self)
{
g_clear_object (&self->layout);
}
/**
* gtk_label_get_measuring_layout:
* @self: the label
* @existing_layout: %NULL or an existing layout already in use.
* @width: the width to measure with in pango units, or -1 for infinite
*
* Gets a layout that can be used for measuring sizes. The returned
* layout will be identical to the label’s layout except for the
* layout’s width, which will be set to @width. Do not modify the returned
* layout.
*
* Returns: a new reference to a pango layout
**/
static PangoLayout *
gtk_label_get_measuring_layout (GtkLabel *self,
PangoLayout *existing_layout,
int width)
{
PangoLayout *copy;
if (existing_layout != NULL)
{
if (existing_layout != self->layout)
{
pango_layout_set_width (existing_layout, width);
return existing_layout;
}
g_object_unref (existing_layout);
}
gtk_label_ensure_layout (self);
if (pango_layout_get_width (self->layout) == width)
{
g_object_ref (self->layout);
return self->layout;
}
/* We can use the label's own layout if we're not allocated a size yet,
* because we don't need it to be properly setup at that point.
* This way we can make use of caching upon the label's creation.
*/
if (gtk_widget_get_width (GTK_WIDGET (self)) <= 1)
{
g_object_ref (self->layout);
pango_layout_set_width (self->layout, width);
return self->layout;
}
/* oftentimes we want to measure a width that is far wider than the current width,
* even though the layout would not change if we made it wider. In that case, we
* can just return the current layout, because for measuring purposes, it will be
* identical.
*/
if (!pango_layout_is_wrapped (self->layout) &&
!pango_layout_is_ellipsized (self->layout))
{
PangoRectangle rect;
if (width == -1)
return g_object_ref (self->layout);
pango_layout_get_extents (self->layout, NULL, &rect);
if (rect.width <= width)
return g_object_ref (self->layout);
}
copy = pango_layout_copy (self->layout);
pango_layout_set_width (copy, width);
return copy;
}
static void
gtk_label_update_layout_attributes (GtkLabel *self,
PangoAttrList *style_attrs)
{
GtkWidget *widget = GTK_WIDGET (self);
GtkCssStyle *style;
PangoAttrList *attrs;
if (self->layout == NULL)
{
pango_attr_list_unref (style_attrs);
return;
}
if (self->select_info && self->select_info->links)
{
guint i;
attrs = pango_attr_list_new ();
for (i = 0; i < self->select_info->n_links; i++)
{
const GtkLabelLink *link = &self->select_info->links[i];
const GdkRGBA *link_color;
PangoAttrList *link_attrs;
PangoAttribute *attr;
style = gtk_css_node_get_style (link->cssnode);
link_attrs = gtk_css_style_get_pango_attributes (style);
if (link_attrs)
{
GSList *attributes = pango_attr_list_get_attributes (link_attrs);
GSList *l;
for (l = attributes; l; l = l->next)
{
attr = l->data;
attr->start_index = link->start;
attr->end_index = link->end;
pango_attr_list_insert (attrs, attr);
}
g_slist_free (attributes);
}
link_color = gtk_css_color_value_get_rgba (style->core->color);
attr = pango_attr_foreground_new (link_color->red * 65535,
link_color->green * 65535,
link_color->blue * 65535);
attr->start_index = link->start;
attr->end_index = link->end;
pango_attr_list_insert (attrs, attr);
pango_attr_list_unref (link_attrs);
}
}
else
attrs = NULL;
style = gtk_css_node_get_style (gtk_widget_get_css_node (widget));
if (!style_attrs)
style_attrs = gtk_css_style_get_pango_attributes (style);
if (style_attrs)
{
attrs = _gtk_pango_attr_list_merge (attrs, style_attrs);
pango_attr_list_unref (style_attrs);
}
attrs = _gtk_pango_attr_list_merge (attrs, self->markup_attrs);
attrs = _gtk_pango_attr_list_merge (attrs, self->attrs);
pango_layout_set_attributes (self->layout, attrs);
pango_attr_list_unref (attrs);
}
static void
gtk_label_ensure_layout (GtkLabel *self)
{
PangoAlignment align;
gboolean rtl;
if (self->layout)
return;
align = PANGO_ALIGN_LEFT; /* Quiet gcc */
rtl = _gtk_widget_get_direction (GTK_WIDGET (self)) == GTK_TEXT_DIR_RTL;
self->layout = gtk_widget_create_pango_layout (GTK_WIDGET (self), self->text);
gtk_label_update_layout_attributes (self, NULL);
switch (self->jtype)
{
case GTK_JUSTIFY_LEFT:
align = rtl ? PANGO_ALIGN_RIGHT : PANGO_ALIGN_LEFT;
break;
case GTK_JUSTIFY_RIGHT:
align = rtl ? PANGO_ALIGN_LEFT : PANGO_ALIGN_RIGHT;
break;
case GTK_JUSTIFY_CENTER:
align = PANGO_ALIGN_CENTER;
break;
case GTK_JUSTIFY_FILL:
align = rtl ? PANGO_ALIGN_RIGHT : PANGO_ALIGN_LEFT;
pango_layout_set_justify (self->layout, TRUE);
break;
default:
g_assert_not_reached();
}
pango_layout_set_alignment (self->layout, align);
pango_layout_set_ellipsize (self->layout, self->ellipsize);
pango_layout_set_wrap (self->layout, self->wrap_mode);
pango_layout_set_single_paragraph_mode (self->layout, self->single_line_mode);
if (self->lines > 0)
pango_layout_set_height (self->layout, - self->lines);
if (self->ellipsize || self->wrap)
pango_layout_set_width (self->layout, gtk_widget_get_width (GTK_WIDGET (self)) * PANGO_SCALE);
}
static GtkSizeRequestMode
gtk_label_get_request_mode (GtkWidget *widget)
{
GtkLabel *self = GTK_LABEL (widget);
if (self->wrap)
return GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH;
return GTK_SIZE_REQUEST_CONSTANT_SIZE;
}
static void
get_height_for_width (GtkLabel *self,
int width,
int *minimum_height,
int *natural_height,
int *minimum_baseline,
int *natural_baseline)
{
PangoLayout *layout;
int text_height, baseline;
layout = gtk_label_get_measuring_layout (self, NULL, width * PANGO_SCALE);
pango_layout_get_pixel_size (layout, NULL, &text_height);
*minimum_height = text_height;
*natural_height = text_height;
baseline = pango_layout_get_baseline (layout) / PANGO_SCALE;
*minimum_baseline = baseline;
*natural_baseline = baseline;
g_object_unref (layout);
}
static int
get_char_pixels (GtkWidget *self,
PangoLayout *layout)
{
PangoContext *context;
PangoFontMetrics *metrics;
int char_width, digit_width;
context = pango_layout_get_context (layout);
metrics = pango_context_get_metrics (context,
pango_context_get_font_description (context),
pango_context_get_language (context));
char_width = pango_font_metrics_get_approximate_char_width (metrics);
digit_width = pango_font_metrics_get_approximate_digit_width (metrics);
pango_font_metrics_unref (metrics);
return MAX (char_width, digit_width);;
}
static void
gtk_label_get_preferred_layout_size (GtkLabel *self,
PangoRectangle *smallest,
PangoRectangle *widest,
int *smallest_baseline,
int *widest_baseline)
{
PangoLayout *layout;
int char_pixels;
/* "width-chars" Hard-coded minimum width:
* - minimum size should be MAX (width-chars, strlen ("..."));
* - natural size should be MAX (width-chars, strlen (self->text));
*
* "max-width-chars" User specified maximum size requisition
* - minimum size should be MAX (width-chars, 0)
* - natural size should be MIN (max-width-chars, strlen (self->text))
*
* For ellipsizing labels; if max-width-chars is specified: either it is used as
* a minimum size or the label text as a minimum size (natural size still overflows).
*
* For wrapping labels; A reasonable minimum size is useful to naturally layout
* interfaces automatically. In this case if no "width-chars" is specified, the minimum
* width will default to the wrap guess that gtk_label_ensure_layout() does.
*/
/* Start off with the pixel extents of an as-wide-as-possible layout */
layout = gtk_label_get_measuring_layout (self, NULL, -1);
if (self->width_chars > -1 || self->max_width_chars > -1)
char_pixels = get_char_pixels (GTK_WIDGET (self), layout);
else
char_pixels = 0;
pango_layout_get_extents (layout, NULL, widest);
widest->width = MAX (widest->width, char_pixels * self->width_chars);
widest->x = widest->y = 0;
*widest_baseline = pango_layout_get_baseline (layout) / PANGO_SCALE;
if (self->ellipsize || self->wrap)
{
/* a layout with width 0 will be as small as humanly possible */
layout = gtk_label_get_measuring_layout (self,
layout,
self->width_chars > -1 ? char_pixels * self->width_chars
: 0);
pango_layout_get_extents (layout, NULL, smallest);
smallest->width = MAX (smallest->width, char_pixels * self->width_chars);
smallest->x = smallest->y = 0;
*smallest_baseline = pango_layout_get_baseline (layout) / PANGO_SCALE;
if (self->max_width_chars > -1 && widest->width > char_pixels * self->max_width_chars)
{
layout = gtk_label_get_measuring_layout (self,
layout,
MAX (smallest->width, char_pixels * self->max_width_chars));
pango_layout_get_extents (layout, NULL, widest);
widest->width = MAX (widest->width, char_pixels * self->width_chars);
widest->x = widest->y = 0;
*widest_baseline = pango_layout_get_baseline (layout) / PANGO_SCALE;
}
if (widest->width < smallest->width)
{
*smallest = *widest;
*smallest_baseline = *widest_baseline;
}
}
else
{
*smallest = *widest;
*smallest_baseline = *widest_baseline;
}
g_object_unref (layout);
}
static void
gtk_label_get_preferred_size (GtkWidget *widget,
GtkOrientation orientation,
int *minimum_size,
int *natural_size,
int *minimum_baseline,
int *natural_baseline)
{
GtkLabel *self = GTK_LABEL (widget);
PangoRectangle widest_rect;
PangoRectangle smallest_rect;
int smallest_baseline;
int widest_baseline;
gtk_label_get_preferred_layout_size (self,
&smallest_rect, &widest_rect,
&smallest_baseline, &widest_baseline);
widest_rect.width = PANGO_PIXELS_CEIL (widest_rect.width);
widest_rect.height = PANGO_PIXELS_CEIL (widest_rect.height);
smallest_rect.width = PANGO_PIXELS_CEIL (smallest_rect.width);
smallest_rect.height = PANGO_PIXELS_CEIL (smallest_rect.height);
if (orientation == GTK_ORIENTATION_HORIZONTAL)
{
/* Normal desired width */
*minimum_size = smallest_rect.width;
*natural_size = widest_rect.width;
if (minimum_baseline)
*minimum_baseline = -1;
if (natural_baseline)
*natural_baseline = -1;
}
else /* GTK_ORIENTATION_VERTICAL */
{
if (smallest_rect.height < widest_rect.height)
{
*minimum_size = smallest_rect.height;
*natural_size = widest_rect.height;
if (minimum_baseline)
*minimum_baseline = smallest_baseline;
if (natural_baseline)
*natural_baseline = widest_baseline;
}
else
{
*minimum_size = widest_rect.height;
*natural_size = smallest_rect.height;
if (minimum_baseline)
*minimum_baseline = widest_baseline;
if (natural_baseline)
*natural_baseline = smallest_baseline;
}
}
}
static void
gtk_label_measure (GtkWidget *widget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline)
{
GtkLabel *self = GTK_LABEL (widget);
if (orientation == GTK_ORIENTATION_VERTICAL && for_size != -1 && self->wrap)
{
gtk_label_clear_layout (self);
get_height_for_width (self, for_size, minimum, natural, minimum_baseline, natural_baseline);
}
else
gtk_label_get_preferred_size (widget, orientation, minimum, natural, minimum_baseline, natural_baseline);
}
static void
get_layout_location (GtkLabel *self,
int *xp,
int *yp)
{
GtkWidget *widget = GTK_WIDGET (self);
int layout_width, layout_height, x, y;
float xalign, yalign;
PangoRectangle logical;
int baseline, layout_baseline, baseline_offset;
int widget_width, widget_height;
xalign = self->xalign;
yalign = self->yalign;
if (_gtk_widget_get_direction (widget) != GTK_TEXT_DIR_LTR)
xalign = 1.0 - xalign;
pango_layout_get_pixel_extents (self->layout, NULL, &logical);
layout_width = logical.width;
layout_height = logical.height;
widget_width = gtk_widget_get_width (widget);
widget_height = gtk_widget_get_height (widget);
baseline = gtk_widget_get_allocated_baseline (widget);
x = floor ((xalign * (widget_width - layout_width)) - logical.x);
baseline_offset = 0;
if (baseline != -1)
{
layout_baseline = pango_layout_get_baseline (self->layout) / PANGO_SCALE;
baseline_offset = baseline - layout_baseline;
yalign = 0.0; /* Can't support yalign while baseline aligning */
}
y = floor ((widget_height - layout_height) * yalign) + baseline_offset;
if (xp)
*xp = x;
if (yp)
*yp = y;
}
static void
gtk_label_size_allocate (GtkWidget *widget,
int width,
int height,
int baseline)
{
GtkLabel *self = GTK_LABEL (widget);
if (self->layout)
{
if (self->ellipsize || self->wrap)
pango_layout_set_width (self->layout, width * PANGO_SCALE);
else
pango_layout_set_width (self->layout, -1);
}
if (self->popup_menu)
gtk_popover_present (GTK_POPOVER (self->popup_menu));
}
static void
gtk_label_update_cursor (GtkLabel *self)
{
GtkWidget *widget = GTK_WIDGET (self);
if (!self->select_info)
return;
if (gtk_widget_is_sensitive (widget))
{
if (self->select_info->active_link)
gtk_widget_set_cursor_from_name (widget, "pointer");
else if (self->select_info->selectable)
gtk_widget_set_cursor_from_name (widget, "text");
else
gtk_widget_set_cursor (widget, NULL);
}
else
gtk_widget_set_cursor (widget, NULL);
}
static void
update_link_state (GtkLabel *self)
{
GtkStateFlags state;
guint i;
if (!self->select_info)
return;
for (i = 0; i < self->select_info->n_links; i++)
{
const GtkLabelLink *link = &self->select_info->links[i];
state = gtk_widget_get_state_flags (GTK_WIDGET (self));
if (link->visited)
state |= GTK_STATE_FLAG_VISITED;
else
state |= GTK_STATE_FLAG_LINK;
if (link == self->select_info->active_link)
{
if (self->select_info->link_clicked)
state |= GTK_STATE_FLAG_ACTIVE;
else
state |= GTK_STATE_FLAG_PRELIGHT;
}
gtk_css_node_set_state (link->cssnode, state);
}
}
static void
gtk_label_state_flags_changed (GtkWidget *widget,
GtkStateFlags prev_state)
{
GtkLabel *self = GTK_LABEL (widget);
if (self->select_info)
{
if (!gtk_widget_is_sensitive (widget))
gtk_label_select_region (self, 0, 0);
gtk_label_update_cursor (self);
update_link_state (self);
}
if (GTK_WIDGET_CLASS (gtk_label_parent_class)->state_flags_changed)
GTK_WIDGET_CLASS (gtk_label_parent_class)->state_flags_changed (widget, prev_state);
}
static void
gtk_label_css_changed (GtkWidget *widget,
GtkCssStyleChange *change)
{
GtkLabel *self = GTK_LABEL (widget);
gboolean attrs_affected;
PangoAttrList *new_attrs = NULL;
GTK_WIDGET_CLASS (gtk_label_parent_class)->css_changed (widget, change);
if (gtk_css_style_change_affects (change, GTK_CSS_AFFECTS_TEXT_ATTRS))
{
new_attrs = gtk_css_style_get_pango_attributes (gtk_css_style_change_get_new_style (change));
attrs_affected = (self->layout && pango_layout_get_attributes (self->layout)) ||
new_attrs;
}
else
attrs_affected = FALSE;
if (change == NULL || attrs_affected || (self->select_info && self->select_info->links))
{
gtk_label_update_layout_attributes (self, new_attrs);
if (attrs_affected)
gtk_widget_queue_draw (widget);
}
}
static PangoDirection
get_cursor_direction (GtkLabel *self)
{
GSList *l;
g_assert (self->select_info);
gtk_label_ensure_layout (self);
for (l = pango_layout_get_lines_readonly (self->layout); l; l = l->next)
{
PangoLayoutLine *line = l->data;
/* If self->select_info->selection_end is at the very end of
* the line, we don't know if the cursor is on this line or
* the next without looking ahead at the next line. (End
* of paragraph is different from line break.) But it's
* definitely in this paragraph, which is good enough
* to figure out the resolved direction.
*/
if (line->start_index + line->length >= self->select_info->selection_end)
return line->resolved_dir;
}
return PANGO_DIRECTION_LTR;
}
static GtkLabelLink *
gtk_label_get_focus_link (GtkLabel *self,
int *out_index)
{
GtkLabelSelectionInfo *info = self->select_info;
int link_index;
if (!info ||
info->selection_anchor != info->selection_end)
goto nope;
link_index = _gtk_label_get_link_at (self, info->selection_anchor);
if (link_index != -1)
{
if (out_index)
*out_index = link_index;
return &info->links[link_index];
}
nope:
if (out_index)
*out_index = -1;
return NULL;
}
#define GRAPHENE_RECT_FROM_RECT(_r) (GRAPHENE_RECT_INIT ((_r)->x, (_r)->y, (_r)->width, (_r)->height))
static void
gtk_label_snapshot (GtkWidget *widget,
GtkSnapshot *snapshot)
{
GtkLabel *self = GTK_LABEL (widget);
GtkLabelSelectionInfo *info;
GtkStyleContext *context;
int lx, ly;
int width, height;
if (!self->text || (*self->text == '\0'))
return;
gtk_label_ensure_layout (self);
context = _gtk_widget_get_style_context (widget);
get_layout_location (self, &lx, &ly);
gtk_snapshot_render_layout (snapshot, context, lx, ly, self->layout);
info = self->select_info;
if (!info)
return;
width = gtk_widget_get_width (widget);
height = gtk_widget_get_height (widget);
if (info->selection_anchor != info->selection_end)
{
int range[2];
cairo_region_t *range_clip;
cairo_rectangle_int_t clip_rect;
int i;
range[0] = MIN (info->selection_anchor, info->selection_end);
range[1] = MAX (info->selection_anchor, info->selection_end);
gtk_style_context_save_to_node (context, info->selection_node);
range_clip = gdk_pango_layout_get_clip_region (self->layout, lx, ly, range, 1);
for (i = 0; i < cairo_region_num_rectangles (range_clip); i++)
{
cairo_region_get_rectangle (range_clip, i, &clip_rect);
gtk_snapshot_push_clip (snapshot, &GRAPHENE_RECT_FROM_RECT (&clip_rect));
gtk_snapshot_render_background (snapshot, context, 0, 0, width, height);
gtk_snapshot_render_layout (snapshot, context, lx, ly, self->layout);
gtk_snapshot_pop (snapshot);
}
cairo_region_destroy (range_clip);
gtk_style_context_restore (context);
}
else
{
GtkLabelLink *focus_link;
GtkLabelLink *active_link;
int range[2];
cairo_region_t *range_clip;
cairo_rectangle_int_t clip_rect;
int i;
GdkRectangle rect;
if (info->selectable &&
gtk_widget_has_focus (widget) &&
gtk_widget_is_drawable (widget))
{
PangoDirection cursor_direction;
cursor_direction = get_cursor_direction (self);
gtk_snapshot_render_insertion_cursor (snapshot, context,
lx, ly,
self->layout, self->select_info->selection_end,
cursor_direction);
}
focus_link = gtk_label_get_focus_link (self, NULL);
active_link = info->active_link;
if (active_link)
{
range[0] = active_link->start;
range[1] = active_link->end;
gtk_style_context_save_to_node (context, active_link->cssnode);
range_clip = gdk_pango_layout_get_clip_region (self->layout, lx, ly, range, 1);
for (i = 0; i < cairo_region_num_rectangles (range_clip); i++)
{
cairo_region_get_rectangle (range_clip, i, &clip_rect);
gtk_snapshot_push_clip (snapshot, &GRAPHENE_RECT_FROM_RECT (&clip_rect));
gtk_snapshot_render_background (snapshot, context, 0, 0, width, height);
gtk_snapshot_render_layout (snapshot, context, lx, ly, self->layout);
gtk_snapshot_pop (snapshot);
}
cairo_region_destroy (range_clip);
gtk_style_context_restore (context);
}
if (focus_link && gtk_widget_has_visible_focus (widget))
{
range[0] = focus_link->start;
range[1] = focus_link->end;
gtk_style_context_save_to_node (context, focus_link->cssnode);
range_clip = gdk_pango_layout_get_clip_region (self->layout, lx, ly, range, 1);
cairo_region_get_extents (range_clip, &rect);
gtk_snapshot_render_focus (snapshot, context, rect.x, rect.y, rect.width, rect.height);
cairo_region_destroy (range_clip);
gtk_style_context_restore (context);
}
}
}
/**
* gtk_label_set_text_with_mnemonic:
* @self: a #GtkLabel
* @str: a string
*
* Sets the label’s text from the string @str.
* If characters in @str are preceded by an underscore, they are underlined
* indicating that they represent a keyboard accelerator called a mnemonic.
* The mnemonic key can be used to activate another widget, chosen
* automatically, or explicitly using gtk_label_set_mnemonic_widget().
**/
void
gtk_label_set_text_with_mnemonic (GtkLabel *self,
const char *str)
{
gboolean changed;
g_return_if_fail (GTK_IS_LABEL (self));
g_return_if_fail (str != NULL);
g_object_freeze_notify (G_OBJECT (self));
changed = gtk_label_set_label_internal (self, str);
changed = gtk_label_set_use_markup_internal (self, FALSE) || changed;
changed = gtk_label_set_use_underline_internal (self, TRUE) || changed;
if (changed)
gtk_label_recalculate (self);
g_object_thaw_notify (G_OBJECT (self));
}
static void
gtk_label_unrealize (GtkWidget *widget)
{
GtkLabel *self = GTK_LABEL (widget);
if (self->select_info &&
self->select_info->provider)
{
GdkClipboard *clipboard = gtk_widget_get_primary_clipboard (widget);
if (gdk_clipboard_get_content (clipboard) == self->select_info->provider)
gdk_clipboard_set_content (clipboard, NULL);
}
GTK_WIDGET_CLASS (gtk_label_parent_class)->unrealize (widget);
}
static gboolean
get_layout_index (GtkLabel *self,
int x,
int y,
int *index)
{
int trailing = 0;
const char *cluster;
const char *cluster_end;
gboolean inside;
int lx, ly;
*index = 0;
gtk_label_ensure_layout (self);
get_layout_location (self, &lx, &ly);
/* Translate x/y to layout position */
x -= lx;
y -= ly;
x *= PANGO_SCALE;
y *= PANGO_SCALE;
inside = pango_layout_xy_to_index (self->layout,
x, y,
index, &trailing);
cluster = self->text + *index;
cluster_end = cluster;
while (trailing)
{
cluster_end = g_utf8_next_char (cluster_end);
--trailing;
}
*index += (cluster_end - cluster);
return inside;
}
static gboolean
range_is_in_ellipsis_full (GtkLabel *self,
int range_start,
int range_end,
int *ellipsis_start,
int *ellipsis_end)
{
PangoLayoutIter *iter;
gboolean in_ellipsis;
if (!self->ellipsize)
return FALSE;
gtk_label_ensure_layout (self);
if (!pango_layout_is_ellipsized (self->layout))
return FALSE;
iter = pango_layout_get_iter (self->layout);
in_ellipsis = FALSE;
do {
PangoLayoutRun *run;
run = pango_layout_iter_get_run_readonly (iter);
if (run)
{
PangoItem *item;
item = ((PangoGlyphItem*)run)->item;
if (item->offset <= range_start && range_end <= item->offset + item->length)
{
if (item->analysis.flags & PANGO_ANALYSIS_FLAG_IS_ELLIPSIS)
{
if (ellipsis_start)
*ellipsis_start = item->offset;
if (ellipsis_end)
*ellipsis_end = item->offset + item->length;
in_ellipsis = TRUE;
}
break;
}
else if (item->offset + item->length >= range_end)
break;
}
} while (pango_layout_iter_next_run (iter));
pango_layout_iter_free (iter);
return in_ellipsis;
}
static gboolean
range_is_in_ellipsis (GtkLabel *self,
int range_start,
int range_end)
{
return range_is_in_ellipsis_full (self, range_start, range_end, NULL, NULL);
}
static void
gtk_label_select_word (GtkLabel *self)
{
int min, max;
int start_index = gtk_label_move_backward_word (self, self->select_info->selection_end);
int end_index = gtk_label_move_forward_word (self, self->select_info->selection_end);
min = MIN (self->select_info->selection_anchor,
self->select_info->selection_end);
max = MAX (self->select_info->selection_anchor,
self->select_info->selection_end);
min = MIN (min, start_index);
max = MAX (max, end_index);
gtk_label_select_region_index (self, min, max);
}
static gboolean
gtk_label_grab_focus (GtkWidget *widget)
{
GtkLabel *self = GTK_LABEL (widget);
gboolean select_on_focus;
GtkWidget *prev_focus;
if (self->select_info == NULL)
return FALSE;
prev_focus = gtk_root_get_focus (gtk_widget_get_root (widget));
if (!GTK_WIDGET_CLASS (gtk_label_parent_class)->grab_focus (widget))
return FALSE;
if (self->select_info->selectable)
{
g_object_get (gtk_widget_get_settings (widget),
"gtk-label-select-on-focus",
&select_on_focus,
NULL);
if (select_on_focus && !self->in_click &&
!(prev_focus && gtk_widget_is_ancestor (prev_focus, widget)))
gtk_label_select_region (self, 0, -1);
}
else
{
if (self->select_info->links && !self->in_click &&
!(prev_focus && gtk_widget_is_ancestor (prev_focus, widget)))
{
guint i;
for (i = 0; i < self->select_info->n_links; i++)
{
const GtkLabelLink *link = &self->select_info->links[i];
if (!range_is_in_ellipsis (self, link->start, link->end))
{
self->select_info->selection_anchor = link->start;
self->select_info->selection_end = link->start;
break;
}
}
}
}
return TRUE;
}
static gboolean
gtk_label_focus (GtkWidget *widget,
GtkDirectionType direction)
{
GtkLabel *self = GTK_LABEL (widget);
GtkLabelSelectionInfo *info = self->select_info;
GtkLabelLink *focus_link;
if (!gtk_widget_is_focus (widget))
{
gtk_widget_grab_focus (widget);
if (info)
{
focus_link = gtk_label_get_focus_link (self, NULL);
if (focus_link && direction == GTK_DIR_TAB_BACKWARD)
{
int i;
for (i = info->n_links - 1; i >= 0; i--)
{
focus_link = &info->links[i];
if (!range_is_in_ellipsis (self, focus_link->start, focus_link->end))
{
info->selection_anchor = focus_link->start;
info->selection_end = focus_link->start;
}
}
}
return TRUE;
}
return FALSE;
}
if (!info)
return FALSE;
if (info->selectable)
{
int index;
if (info->selection_anchor != info->selection_end)
goto out;
index = info->selection_anchor;
if (direction == GTK_DIR_TAB_FORWARD)
{
guint i;
for (i = 0; i < info->n_links; i++)
{
const GtkLabelLink *link = &info->links[i];
if (link->start > index)
{
if (!range_is_in_ellipsis (self, link->start, link->end))
{
gtk_label_select_region_index (self, link->start, link->start);
return TRUE;
}
}
}
}
else if (direction == GTK_DIR_TAB_BACKWARD)
{
int i;
for (i = info->n_links - 1; i >= 0; i--)
{
GtkLabelLink *link = &info->links[i];
if (link->end < index)
{
if (!range_is_in_ellipsis (self, link->start, link->end))
{
gtk_label_select_region_index (self, link->start, link->start);
return TRUE;
}
}
}
}
goto out;
}
else
{
int focus_link_index;
int new_index = -1;
int i;
if (info->n_links == 0)
goto out;
focus_link = gtk_label_get_focus_link (self, &focus_link_index);
if (!focus_link)
goto out;
switch (direction)
{
case GTK_DIR_TAB_FORWARD:
if (focus_link)
new_index = (focus_link_index + 1) % info->n_links;
else
new_index = 0;
for (i = new_index; i < info->n_links; i++)
{
const GtkLabelLink *link = &info->links[i];
if (!range_is_in_ellipsis (self, link->start, link->end))
break;
}
break;
case GTK_DIR_TAB_BACKWARD:
if (focus_link)
new_index = focus_link_index == 0 ? info->n_links - 1 : focus_link_index - 1;
else
new_index = info->n_links - 1;
for (i = new_index; i >= 0; i--)
{
const GtkLabelLink *link = &info->links[i];
if (!range_is_in_ellipsis (self, link->start, link->end))
break;
}
break;
default:
case GTK_DIR_UP:
case GTK_DIR_DOWN:
case GTK_DIR_LEFT:
case GTK_DIR_RIGHT:
goto out;
}
if (new_index != -1)
{
focus_link = &info->links[new_index];
info->selection_anchor = focus_link->start;
info->selection_end = focus_link->start;
gtk_widget_queue_draw (widget);
return TRUE;
}
}
out:
return FALSE;
}
static void
gtk_label_click_gesture_pressed (GtkGestureClick *gesture,
int n_press,
double widget_x,
double widget_y,
GtkLabel *self)
{
GtkLabelSelectionInfo *info = self->select_info;
GtkWidget *widget = GTK_WIDGET (self);
GdkEventSequence *sequence;
GdkEvent *event;
guint button;
button = gtk_gesture_single_get_current_button (GTK_GESTURE_SINGLE (gesture));
sequence = gtk_gesture_single_get_current_sequence (GTK_GESTURE_SINGLE (gesture));
event = gtk_gesture_get_last_event (GTK_GESTURE (gesture), sequence);
gtk_label_update_active_link (widget, widget_x, widget_y);
gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_CLAIMED);
if (info->active_link)
{
if (gdk_event_triggers_context_menu (event))
{
info->link_clicked = TRUE;
update_link_state (self);
gtk_label_do_popup (self, widget_x, widget_y);
return;
}
else if (button == GDK_BUTTON_PRIMARY)
{
info->link_clicked = TRUE;
update_link_state (self);
gtk_widget_queue_draw (widget);
if (!info->selectable)
return;
}
}
if (!info->selectable)
{
gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_DENIED);
return;
}
info->in_drag = FALSE;
info->select_words = FALSE;
if (gdk_event_triggers_context_menu (event))
gtk_label_do_popup (self, widget_x, widget_y);
else if (button == GDK_BUTTON_PRIMARY)
{
if (!gtk_widget_has_focus (widget))
{
self->in_click = TRUE;
gtk_widget_grab_focus (widget);
self->in_click = FALSE;
}
if (n_press == 3)
gtk_label_select_region_index (self, 0, strlen (self->text));
else if (n_press == 2)
{
info->select_words = TRUE;
gtk_label_select_word (self);
}
}
else
{
gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_DENIED);
return;
}
if (n_press >= 3)
gtk_event_controller_reset (GTK_EVENT_CONTROLLER (gesture));
}
static void
gtk_label_click_gesture_released (GtkGestureClick *gesture,
int n_press,
double x,
double y,
GtkLabel *self)
{
GtkLabelSelectionInfo *info = self->select_info;
GdkEventSequence *sequence;
int index;
if (info == NULL)
return;
sequence = gtk_gesture_single_get_current_sequence (GTK_GESTURE_SINGLE (gesture));
if (!gtk_gesture_handles_sequence (GTK_GESTURE (gesture), sequence))
return;
if (n_press != 1)
return;
if (info->in_drag)
{
info->in_drag = 0;
get_layout_index (self, x, y, &index);
gtk_label_select_region_index (self, index, index);
}
else if (info->active_link &&
info->selection_anchor == info->selection_end &&
info->link_clicked)
{
emit_activate_link (self, info->active_link);
info->link_clicked = FALSE;
}
}
static GdkPaintable *
get_selection_paintable (GtkLabel *self)
{
if ((self->select_info->selection_anchor !=
self->select_info->selection_end) &&
self->text)
{
int start, end;
int len;
start = MIN (self->select_info->selection_anchor,
self->select_info->selection_end);
end = MAX (self->select_info->selection_anchor,
self->select_info->selection_end);
len = strlen (self->text);
if (end > len)
end = len;
if (start > len)
start = len;
return gtk_text_util_create_drag_icon (GTK_WIDGET (self), self->text + start, end - start);
}
return NULL;
}
static void
gtk_label_drag_gesture_begin (GtkGestureDrag *gesture,
double start_x,
double start_y,
GtkLabel *self)
{
GtkLabelSelectionInfo *info = self->select_info;
GdkModifierType state_mask;
GdkEventSequence *sequence;
GdkEvent *event;
int min, max, index;
if (!info || !info->selectable)
{
gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_DENIED);
return;
}
get_layout_index (self, start_x, start_y, &index);
min = MIN (info->selection_anchor, info->selection_end);
max = MAX (info->selection_anchor, info->selection_end);
sequence = gtk_gesture_single_get_current_sequence (GTK_GESTURE_SINGLE (gesture));
event = gtk_gesture_get_last_event (GTK_GESTURE (gesture), sequence);
state_mask = gdk_event_get_modifier_state (event);
if ((info->selection_anchor != info->selection_end) &&
(state_mask & GDK_SHIFT_MASK))
{
if (index > min && index < max)
{
/* truncate selection, but keep it as big as possible */
if (index - min > max - index)
max = index;
else
min = index;
}
else
{
/* extend (same as motion) */
min = MIN (min, index);
max = MAX (max, index);
}
/* ensure the anchor is opposite index */
if (index == min)
{
int tmp = min;
min = max;
max = tmp;
}
gtk_label_select_region_index (self, min, max);
}
else
{
if (min < max && min <= index && index <= max)
{
info->in_drag = TRUE;
info->drag_start_x = start_x;
info->drag_start_y = start_y;
}
else
/* start a replacement */
gtk_label_select_region_index (self, index, index);
}
}
static void
gtk_label_drag_gesture_update (GtkGestureDrag *gesture,
double offset_x,
double offset_y,
GtkLabel *self)
{
GtkLabelSelectionInfo *info = self->select_info;
GtkWidget *widget = GTK_WIDGET (self);
GdkEventSequence *sequence;
double x, y;
int index;
if (info == NULL || !info->selectable)
return;
sequence = gtk_gesture_single_get_current_sequence (GTK_GESTURE_SINGLE (gesture));
gtk_gesture_get_point (GTK_GESTURE (gesture), sequence, &x, &y);
if (info->in_drag)
{
if (gtk_drag_check_threshold (widget, info->drag_start_x, info->drag_start_y, x, y))
{
GdkDrag *drag;
GdkSurface *surface;
GdkDevice *device;
surface = gtk_native_get_surface (gtk_widget_get_native (widget));
device = gtk_gesture_get_device (GTK_GESTURE (gesture));
drag = gdk_drag_begin (surface,
device,
info->provider,
GDK_ACTION_COPY,
info->drag_start_x,
info->drag_start_y);
gtk_drag_icon_set_from_paintable (drag, get_selection_paintable (self), 0, 0);
g_object_unref (drag);
info->in_drag = FALSE;
}
}
else
{
get_layout_index (self, x, y, &index);
if (index != info->selection_anchor)
gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_CLAIMED);
if (info->select_words)
{
int min, max;
int old_min, old_max;
int anchor, end;
min = gtk_label_move_backward_word (self, index);
max = gtk_label_move_forward_word (self, index);
anchor = info->selection_anchor;
end = info->selection_end;
old_min = MIN (anchor, end);
old_max = MAX (anchor, end);
if (min < old_min)
{
anchor = min;
end = old_max;
}
else if (old_max < max)
{
anchor = max;
end = old_min;
}
else if (anchor == old_min)
{
if (anchor != min)
anchor = max;
}
else
{
if (anchor != max)
anchor = min;
}
gtk_label_select_region_index (self, anchor, end);
}
else
gtk_label_select_region_index (self, info->selection_anchor, index);
}
}
static void
gtk_label_update_active_link (GtkWidget *widget,
double x,
double y)
{
GtkLabel *self = GTK_LABEL (widget);
GtkLabelSelectionInfo *info = self->select_info;
int index;
if (info == NULL)
return;
if (info->links && !info->in_drag)
{
GtkLabelLink *link;
gboolean found = FALSE;
if (info->selection_anchor == info->selection_end)
{
if (get_layout_index (self, x, y, &index))
{
const int link_index = _gtk_label_get_link_at (self, index);
if (link_index != -1)
{
link = &info->links[link_index];
if (!range_is_in_ellipsis (self, link->start, link->end))
found = TRUE;
}
}
}
if (found)
{
if (info->active_link != link)
{
info->link_clicked = FALSE;
info->active_link = link;
update_link_state (self);
gtk_label_update_cursor (self);
gtk_widget_queue_draw (widget);
}
}
else
{
if (info->active_link != NULL)
{
info->link_clicked = FALSE;
info->active_link = NULL;
update_link_state (self);
gtk_label_update_cursor (self);
gtk_widget_queue_draw (widget);
}
}
gtk_label_update_actions (self);
}
}
static void
gtk_label_motion (GtkEventControllerMotion *controller,
double x,
double y,
gpointer data)
{
gtk_label_update_active_link (GTK_WIDGET (data), x, y);
}
static void
gtk_label_leave (GtkEventControllerMotion *controller,
gpointer data)
{
GtkLabel *self = GTK_LABEL (data);
if (self->select_info)
{
self->select_info->active_link = NULL;
gtk_label_update_cursor (self);
gtk_widget_queue_draw (GTK_WIDGET (self));
}
}
#define GTK_TYPE_LABEL_CONTENT (gtk_label_content_get_type ())
#define GTK_LABEL_CONTENT(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_LABEL_CONTENT, GtkLabelContent))
#define GTK_IS_LABEL_CONTENT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_TYPE_LABEL_CONTENT))
#define GTK_LABEL_CONTENT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_LABEL_CONTENT, GtkLabelContentClass))
#define GTK_IS_LABEL_CONTENT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_LABEL_CONTENT))
#define GTK_LABEL_CONTENT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_LABEL_CONTENT, GtkLabelContentClass))
typedef struct _GtkLabelContent GtkLabelContent;
typedef struct _GtkLabelContentClass GtkLabelContentClass;
struct _GtkLabelContent
{
GdkContentProvider parent;
GtkLabel *label;
};
struct _GtkLabelContentClass
{
GdkContentProviderClass parent_class;
};
GType gtk_label_content_get_type (void) G_GNUC_CONST;
G_DEFINE_TYPE (GtkLabelContent, gtk_label_content, GDK_TYPE_CONTENT_PROVIDER)
static GdkContentFormats *
gtk_label_content_ref_formats (GdkContentProvider *provider)
{
GtkLabelContent *content = GTK_LABEL_CONTENT (provider);
if (content->label)
return gdk_content_formats_new_for_gtype (G_TYPE_STRING);
else
return gdk_content_formats_new (NULL, 0);
}
static gboolean
gtk_label_content_get_value (GdkContentProvider *provider,
GValue *value,
GError **error)
{
GtkLabelContent *content = GTK_LABEL_CONTENT (provider);
if (G_VALUE_HOLDS (value, G_TYPE_STRING) &&
content->label != NULL)
{
GtkLabel *self = content->label;
if (self->select_info &&
(self->select_info->selection_anchor !=
self->select_info->selection_end) &&
self->text)
{
int start, end;
int len;
char *str;
start = MIN (self->select_info->selection_anchor,
self->select_info->selection_end);
end = MAX (self->select_info->selection_anchor,
self->select_info->selection_end);
len = strlen (self->text);
if (end > len)
end = len;
if (start > len)
start = len;
str = g_strndup (self->text + start, end - start);
g_value_take_string (value, str);
return TRUE;
}
}
return GDK_CONTENT_PROVIDER_CLASS (gtk_label_content_parent_class)->get_value (provider, value, error);
}
static void
gtk_label_content_detach (GdkContentProvider *provider,
GdkClipboard *clipboard)
{
GtkLabelContent *content = GTK_LABEL_CONTENT (provider);
GtkLabel *self = content->label;
if (self == NULL || self->select_info == NULL)
return;
self->select_info->selection_anchor = self->select_info->selection_end;
gtk_widget_queue_draw (GTK_WIDGET (self));
}
static void
gtk_label_content_class_init (GtkLabelContentClass *class)
{
GdkContentProviderClass *provider_class = GDK_CONTENT_PROVIDER_CLASS (class);
provider_class->ref_formats = gtk_label_content_ref_formats;
provider_class->get_value = gtk_label_content_get_value;
provider_class->detach_clipboard = gtk_label_content_detach;
}
static void
gtk_label_content_init (GtkLabelContent *content)
{
}
static void
focus_change (GtkEventControllerFocus *controller,
GtkLabel *self)
{
gtk_widget_queue_draw (GTK_WIDGET (self));
}
static void
gtk_label_ensure_select_info (GtkLabel *self)
{
if (self->select_info == NULL)
{
self->select_info = g_new0 (GtkLabelSelectionInfo, 1);
gtk_widget_set_focusable (GTK_WIDGET (self), TRUE);
self->select_info->drag_gesture = gtk_gesture_drag_new ();
g_signal_connect (self->select_info->drag_gesture, "drag-begin",
G_CALLBACK (gtk_label_drag_gesture_begin), self);
g_signal_connect (self->select_info->drag_gesture, "drag-update",
G_CALLBACK (gtk_label_drag_gesture_update), self);
gtk_gesture_single_set_exclusive (GTK_GESTURE_SINGLE (self->select_info->drag_gesture), TRUE);
gtk_widget_add_controller (GTK_WIDGET (self), GTK_EVENT_CONTROLLER (self->select_info->drag_gesture));
self->select_info->click_gesture = gtk_gesture_click_new ();
g_signal_connect (self->select_info->click_gesture, "pressed",
G_CALLBACK (gtk_label_click_gesture_pressed), self);
g_signal_connect (self->select_info->click_gesture, "released",
G_CALLBACK (gtk_label_click_gesture_released), self);
gtk_gesture_single_set_button (GTK_GESTURE_SINGLE (self->select_info->click_gesture), 0);
gtk_gesture_single_set_exclusive (GTK_GESTURE_SINGLE (self->select_info->click_gesture), TRUE);
gtk_widget_add_controller (GTK_WIDGET (self), GTK_EVENT_CONTROLLER (self->select_info->click_gesture));
self->select_info->motion_controller = gtk_event_controller_motion_new ();
g_signal_connect (self->select_info->motion_controller, "motion",
G_CALLBACK (gtk_label_motion), self);
g_signal_connect (self->select_info->motion_controller, "leave",
G_CALLBACK (gtk_label_leave), self);
gtk_widget_add_controller (GTK_WIDGET (self), self->select_info->motion_controller);
self->select_info->focus_controller = gtk_event_controller_focus_new ();
g_signal_connect (self->select_info->focus_controller, "enter",
G_CALLBACK (focus_change), self);
g_signal_connect (self->select_info->focus_controller, "leave",
G_CALLBACK (focus_change), self);
gtk_widget_add_controller (GTK_WIDGET (self), GTK_EVENT_CONTROLLER (self->select_info->focus_controller));
self->select_info->provider = g_object_new (GTK_TYPE_LABEL_CONTENT, NULL);
GTK_LABEL_CONTENT (self->select_info->provider)->label = self;
gtk_label_update_cursor (self);
}
}
static void
gtk_label_clear_select_info (GtkLabel *self)
{
if (self->select_info == NULL)
return;
if (!self->select_info->selectable && !self->select_info->links)
{
gtk_widget_remove_controller (GTK_WIDGET (self), GTK_EVENT_CONTROLLER (self->select_info->drag_gesture));
gtk_widget_remove_controller (GTK_WIDGET (self), GTK_EVENT_CONTROLLER (self->select_info->click_gesture));
gtk_widget_remove_controller (GTK_WIDGET (self), self->select_info->motion_controller);
gtk_widget_remove_controller (GTK_WIDGET (self), self->select_info->focus_controller);
GTK_LABEL_CONTENT (self->select_info->provider)->label = NULL;
g_object_unref (self->select_info->provider);
g_free (self->select_info);
self->select_info = NULL;
gtk_widget_set_cursor (GTK_WIDGET (self), NULL);
gtk_widget_set_focusable (GTK_WIDGET (self), FALSE);
}
}
/**
* gtk_label_set_selectable:
* @self: a #GtkLabel
* @setting: %TRUE to allow selecting text in the label
*
* Selectable labels allow the user to select text from the label, for
* copy-and-paste.
**/
void
gtk_label_set_selectable (GtkLabel *self,
gboolean setting)
{
gboolean old_setting;
g_return_if_fail (GTK_IS_LABEL (self));
setting = setting != FALSE;
old_setting = self->select_info && self->select_info->selectable;
if (setting)
{
gtk_label_ensure_select_info (self);
self->select_info->selectable = TRUE;
gtk_label_update_cursor (self);
}
else
{
if (old_setting)
{
/* unselect, to give up the selection */
gtk_label_select_region (self, 0, 0);
self->select_info->selectable = FALSE;
gtk_label_clear_select_info (self);
}
}
if (setting != old_setting)
{
g_object_freeze_notify (G_OBJECT (self));
g_object_notify_by_pspec (G_OBJECT (self), label_props[PROP_SELECTABLE]);
g_object_thaw_notify (G_OBJECT (self));
gtk_widget_queue_draw (GTK_WIDGET (self));
}
}
/**
* gtk_label_get_selectable:
* @self: a #GtkLabel
*
* Gets the value set by gtk_label_set_selectable().
*
* Returns: %TRUE if the user can copy text from the label
**/
gboolean
gtk_label_get_selectable (GtkLabel *self)
{
g_return_val_if_fail (GTK_IS_LABEL (self), FALSE);
return self->select_info && self->select_info->selectable;
}
static void
gtk_label_select_region_index (GtkLabel *self,
int anchor_index,
int end_index)
{
g_return_if_fail (GTK_IS_LABEL (self));
if (self->select_info && self->select_info->selectable)
{
GdkClipboard *clipboard;
int s, e;
/* Ensure that we treat an ellipsized region like a single
* character with respect to selection.
*/
if (anchor_index < end_index)
{
if (range_is_in_ellipsis_full (self, anchor_index, anchor_index + 1, &s, &e))
{
if (self->select_info->selection_anchor == s)
anchor_index = e;
else
anchor_index = s;
}
if (range_is_in_ellipsis_full (self, end_index - 1, end_index, &s, &e))
{
if (self->select_info->selection_end == e)
end_index = s;
else
end_index = e;
}
}
else if (end_index < anchor_index)
{
if (range_is_in_ellipsis_full (self, end_index, end_index + 1, &s, &e))
{
if (self->select_info->selection_end == s)
end_index = e;
else
end_index = s;
}
if (range_is_in_ellipsis_full (self, anchor_index - 1, anchor_index, &s, &e))
{
if (self->select_info->selection_anchor == e)
anchor_index = s;
else
anchor_index = e;
}
}
else
{
if (range_is_in_ellipsis_full (self, anchor_index, anchor_index, &s, &e))
{
if (self->select_info->selection_anchor == s)
anchor_index = e;
else if (self->select_info->selection_anchor == e)
anchor_index = s;
else if (anchor_index - s < e - anchor_index)
anchor_index = s;
else
anchor_index = e;
end_index = anchor_index;
}
}
if (self->select_info->selection_anchor == anchor_index &&
self->select_info->selection_end == end_index)
return;
g_object_freeze_notify (G_OBJECT (self));
self->select_info->selection_anchor = anchor_index;
self->select_info->selection_end = end_index;
clipboard = gtk_widget_get_primary_clipboard (GTK_WIDGET (self));
if (anchor_index != end_index)
{
gdk_content_provider_content_changed (self->select_info->provider);
gdk_clipboard_set_content (clipboard, self->select_info->provider);
if (!self->select_info->selection_node)
{
GtkCssNode *widget_node;
widget_node = gtk_widget_get_css_node (GTK_WIDGET (self));
self->select_info->selection_node = gtk_css_node_new ();
gtk_css_node_set_name (self->select_info->selection_node, g_quark_from_static_string ("selection"));
gtk_css_node_set_parent (self->select_info->selection_node, widget_node);
gtk_css_node_set_state (self->select_info->selection_node, gtk_css_node_get_state (widget_node));
g_object_unref (self->select_info->selection_node);
}
}
else
{
if (gdk_clipboard_get_content (clipboard) == self->select_info->provider)
gdk_clipboard_set_content (clipboard, NULL);
if (self->select_info->selection_node)
{
gtk_css_node_set_parent (self->select_info->selection_node, NULL);
self->select_info->selection_node = NULL;
}
}
gtk_label_update_actions (self);
gtk_widget_queue_draw (GTK_WIDGET (self));
g_object_thaw_notify (G_OBJECT (self));
}
}
/**
* gtk_label_select_region:
* @self: a #GtkLabel
* @start_offset: start offset (in characters not bytes)
* @end_offset: end offset (in characters not bytes)
*
* Selects a range of characters in the label, if the label is selectable.
* See gtk_label_set_selectable(). If the label is not selectable,
* this function has no effect. If @start_offset or
* @end_offset are -1, then the end of the label will be substituted.
**/
void
gtk_label_select_region (GtkLabel *self,
int start_offset,
int end_offset)
{
g_return_if_fail (GTK_IS_LABEL (self));
if (self->text && self->select_info)
{
if (start_offset < 0)
start_offset = g_utf8_strlen (self->text, -1);
if (end_offset < 0)
end_offset = g_utf8_strlen (self->text, -1);
gtk_label_select_region_index (self,
g_utf8_offset_to_pointer (self->text, start_offset) - self->text,
g_utf8_offset_to_pointer (self->text, end_offset) - self->text);
}
}
/**
* gtk_label_get_selection_bounds:
* @self: a #GtkLabel
* @start: (out): return location for start of selection, as a character offset
* @end: (out): return location for end of selection, as a character offset
*
* Gets the selected range of characters in the label, returning %TRUE
* if there’s a selection.
*
* Returns: %TRUE if selection is non-empty
**/
gboolean
gtk_label_get_selection_bounds (GtkLabel *self,
int *start,
int *end)
{
g_return_val_if_fail (GTK_IS_LABEL (self), FALSE);
if (self->select_info == NULL)
{
/* not a selectable label */
if (start)
*start = 0;
if (end)
*end = 0;
return FALSE;
}
else
{
int start_index, end_index;
int start_offset, end_offset;
int len;
start_index = MIN (self->select_info->selection_anchor,
self->select_info->selection_end);
end_index = MAX (self->select_info->selection_anchor,
self->select_info->selection_end);
len = strlen (self->text);
if (end_index > len)
end_index = len;
if (start_index > len)
start_index = len;
start_offset = g_utf8_strlen (self->text, start_index);
end_offset = g_utf8_strlen (self->text, end_index);
if (start_offset > end_offset)
{
int tmp = start_offset;
start_offset = end_offset;
end_offset = tmp;
}
if (start)
*start = start_offset;
if (end)
*end = end_offset;
return start_offset != end_offset;
}
}
/**
* gtk_label_get_layout:
* @self: a #GtkLabel
*
* Gets the #PangoLayout used to display the label.
* The layout is useful to e.g. convert text positions to
* pixel positions, in combination with gtk_label_get_layout_offsets().
* The returned layout is owned by the @label so need not be
* freed by the caller. The @label is free to recreate its layout at
* any time, so it should be considered read-only.
*
* Returns: (transfer none): the #PangoLayout for this label
**/
PangoLayout*
gtk_label_get_layout (GtkLabel *self)
{
g_return_val_if_fail (GTK_IS_LABEL (self), NULL);
gtk_label_ensure_layout (self);
return self->layout;
}
/**
* gtk_label_get_layout_offsets:
* @self: a #GtkLabel
* @x: (out) (optional): location to store X offset of layout, or %NULL
* @y: (out) (optional): location to store Y offset of layout, or %NULL
*
* Obtains the coordinates where the label will draw the #PangoLayout
* representing the text in the label; useful to convert mouse events
* into coordinates inside the #PangoLayout, e.g. to take some action
* if some part of the label is clicked. Remember
* when using the #PangoLayout functions you need to convert to
* and from pixels using PANGO_PIXELS() or #PANGO_SCALE.
**/
void
gtk_label_get_layout_offsets (GtkLabel *self,
int *x,
int *y)
{
g_return_if_fail (GTK_IS_LABEL (self));
gtk_label_ensure_layout (self);
get_layout_location (self, x, y);
}
/**
* gtk_label_set_use_markup:
* @self: a #GtkLabel
* @setting: %TRUE if the label’s text should be parsed for markup.
*
* Sets whether the text of the label contains markup in
* [Pango’s text markup language][PangoMarkupFormat].
* See gtk_label_set_markup().
**/
void
gtk_label_set_use_markup (GtkLabel *self,
gboolean setting)
{
g_return_if_fail (GTK_IS_LABEL (self));
g_object_freeze_notify (G_OBJECT (self));
if (gtk_label_set_use_markup_internal (self, !!setting))
gtk_label_recalculate (self);
g_object_thaw_notify (G_OBJECT (self));
}
/**
* gtk_label_get_use_markup:
* @self: a #GtkLabel
*
* Returns whether the label’s text is interpreted as marked up with
* the [Pango text markup language][PangoMarkupFormat].
* See gtk_label_set_use_markup ().
*
* Returns: %TRUE if the label’s text will be parsed for markup.
**/
gboolean
gtk_label_get_use_markup (GtkLabel *self)
{
g_return_val_if_fail (GTK_IS_LABEL (self), FALSE);
return self->use_markup;
}
/**
* gtk_label_set_use_underline:
* @self: a #GtkLabel
* @setting: %TRUE if underlines in the text indicate mnemonics
*
* If true, an underline in the text indicates the next character should be
* used for the mnemonic accelerator key.
*/
void
gtk_label_set_use_underline (GtkLabel *self,
gboolean setting)
{
g_return_if_fail (GTK_IS_LABEL (self));
g_object_freeze_notify (G_OBJECT (self));
if (gtk_label_set_use_underline_internal (self, !!setting))
gtk_label_recalculate (self);
g_object_thaw_notify (G_OBJECT (self));
}
/**
* gtk_label_get_use_underline:
* @self: a #GtkLabel
*
* Returns whether an embedded underline in the label indicates a
* mnemonic. See gtk_label_set_use_underline().
*
* Returns: %TRUE whether an embedded underline in the label indicates
* the mnemonic accelerator keys.
**/
gboolean
gtk_label_get_use_underline (GtkLabel *self)
{
g_return_val_if_fail (GTK_IS_LABEL (self), FALSE);
return self->use_underline;
}
/**
* gtk_label_set_single_line_mode:
* @self: a #GtkLabel
* @single_line_mode: %TRUE if the label should be in single line mode
*
* Sets whether the label is in single line mode.
*/
void
gtk_label_set_single_line_mode (GtkLabel *self,
gboolean single_line_mode)
{
g_return_if_fail (GTK_IS_LABEL (self));
single_line_mode = single_line_mode != FALSE;
if (self->single_line_mode != single_line_mode)
{
self->single_line_mode = single_line_mode;
gtk_label_clear_layout (self);
gtk_widget_queue_resize (GTK_WIDGET (self));
g_object_notify_by_pspec (G_OBJECT (self), label_props[PROP_SINGLE_LINE_MODE]);
}
}
/**
* gtk_label_get_single_line_mode:
* @self: a #GtkLabel
*
* Returns whether the label is in single line mode.
*
* Returns: %TRUE when the label is in single line mode.
**/
gboolean
gtk_label_get_single_line_mode (GtkLabel *self)
{
g_return_val_if_fail (GTK_IS_LABEL (self), FALSE);
return self->single_line_mode;
}
/* Compute the X position for an offset that corresponds to the "more important
* cursor position for that offset. We use this when trying to guess to which
* end of the selection we should go to when the user hits the left or
* right arrow key.
*/
static void
get_better_cursor (GtkLabel *self,
int index,
int *x,
int *y)
{
GdkSeat *seat;
GdkDevice *keyboard;
PangoDirection keymap_direction;
PangoDirection cursor_direction;
gboolean split_cursor;
PangoRectangle strong_pos, weak_pos;
seat = gdk_display_get_default_seat (gtk_widget_get_display (GTK_WIDGET (self)));
if (seat)
keyboard = gdk_seat_get_keyboard (seat);
else
keyboard = NULL;
if (keyboard)
keymap_direction = gdk_device_get_direction (keyboard);
else
keymap_direction = PANGO_DIRECTION_LTR;
cursor_direction = get_cursor_direction (self);
g_object_get (gtk_widget_get_settings (GTK_WIDGET (self)),
"gtk-split-cursor", &split_cursor,
NULL);
gtk_label_ensure_layout (self);
pango_layout_get_cursor_pos (self->layout, index,
&strong_pos, &weak_pos);
if (split_cursor)
{
*x = strong_pos.x / PANGO_SCALE;
*y = strong_pos.y / PANGO_SCALE;
}
else
{
if (keymap_direction == cursor_direction)
{
*x = strong_pos.x / PANGO_SCALE;
*y = strong_pos.y / PANGO_SCALE;
}
else
{
*x = weak_pos.x / PANGO_SCALE;
*y = weak_pos.y / PANGO_SCALE;
}
}
}
static int
gtk_label_move_logically (GtkLabel *self,
int start,
int count)
{
int offset = g_utf8_pointer_to_offset (self->text,
self->text + start);
if (self->text)
{
const PangoLogAttr *log_attrs;
int n_attrs;
int length;
gtk_label_ensure_layout (self);
length = g_utf8_strlen (self->text, -1);
log_attrs = pango_layout_get_log_attrs_readonly (self->layout, &n_attrs);
while (count > 0 && offset < length)
{
do
offset++;
while (offset < length && !log_attrs[offset].is_cursor_position);
count--;
}
while (count < 0 && offset > 0)
{
do
offset--;
while (offset > 0 && !log_attrs[offset].is_cursor_position);
count++;
}
}
return g_utf8_offset_to_pointer (self->text, offset) - self->text;
}
static int
gtk_label_move_visually (GtkLabel *self,
int start,
int count)
{
int index;
index = start;
while (count != 0)
{
int new_index, new_trailing;
gboolean split_cursor;
gboolean strong;
gtk_label_ensure_layout (self);
g_object_get (gtk_widget_get_settings (GTK_WIDGET (self)),
"gtk-split-cursor", &split_cursor,
NULL);
if (split_cursor)
strong = TRUE;
else
{
GdkSeat *seat;
GdkDevice *keyboard;
PangoDirection keymap_direction;
seat = gdk_display_get_default_seat (gtk_widget_get_display (GTK_WIDGET (self)));
if (seat)
keyboard = gdk_seat_get_keyboard (seat);
else
keyboard = NULL;
if (keyboard)
keymap_direction = gdk_device_get_direction (keyboard);
else
keymap_direction = PANGO_DIRECTION_LTR;
strong = keymap_direction == get_cursor_direction (self);
}
if (count > 0)
{
pango_layout_move_cursor_visually (self->layout, strong, index, 0, 1, &new_index, &new_trailing);
count--;
}
else
{
pango_layout_move_cursor_visually (self->layout, strong, index, 0, -1, &new_index, &new_trailing);
count++;
}
if (new_index < 0 || new_index == G_MAXINT)
break;
index = new_index;
while (new_trailing--)
index = g_utf8_next_char (self->text + new_index) - self->text;
}
return index;
}
static int
gtk_label_move_forward_word (GtkLabel *self,
int start)
{
int new_pos = g_utf8_pointer_to_offset (self->text,
self->text + start);
int length;
length = g_utf8_strlen (self->text, -1);
if (new_pos < length)
{
const PangoLogAttr *log_attrs;
int n_attrs;
gtk_label_ensure_layout (self);
log_attrs = pango_layout_get_log_attrs_readonly (self->layout, &n_attrs);
/* Find the next word end */
new_pos++;
while (new_pos < n_attrs && !log_attrs[new_pos].is_word_end)
new_pos++;
}
return g_utf8_offset_to_pointer (self->text, new_pos) - self->text;
}
static int
gtk_label_move_backward_word (GtkLabel *self,
int start)
{
int new_pos = g_utf8_pointer_to_offset (self->text,
self->text + start);
if (new_pos > 0)
{
const PangoLogAttr *log_attrs;
int n_attrs;
gtk_label_ensure_layout (self);
log_attrs = pango_layout_get_log_attrs_readonly (self->layout, &n_attrs);
new_pos -= 1;
/* Find the previous word beginning */
while (new_pos > 0 && !log_attrs[new_pos].is_word_start)
new_pos--;
}
return g_utf8_offset_to_pointer (self->text, new_pos) - self->text;
}
static void
gtk_label_move_cursor (GtkLabel *self,
GtkMovementStep step,
int count,
gboolean extend_selection)
{
int old_pos;
int new_pos;
if (self->select_info == NULL)
return;
old_pos = new_pos = self->select_info->selection_end;
if (self->select_info->selection_end != self->select_info->selection_anchor &&
!extend_selection)
{
/* If we have a current selection and aren't extending it, move to the
* start/or end of the selection as appropriate
*/
switch (step)
{
case GTK_MOVEMENT_VISUAL_POSITIONS:
{
int end_x, end_y;
int anchor_x, anchor_y;
gboolean end_is_left;
get_better_cursor (self, self->select_info->selection_end, &end_x, &end_y);
get_better_cursor (self, self->select_info->selection_anchor, &anchor_x, &anchor_y);
end_is_left = (end_y < anchor_y) || (end_y == anchor_y && end_x < anchor_x);
if (count < 0)
new_pos = end_is_left ? self->select_info->selection_end : self->select_info->selection_anchor;
else
new_pos = !end_is_left ? self->select_info->selection_end : self->select_info->selection_anchor;
break;
}
case GTK_MOVEMENT_LOGICAL_POSITIONS:
case GTK_MOVEMENT_WORDS:
if (count < 0)
new_pos = MIN (self->select_info->selection_end, self->select_info->selection_anchor);
else
new_pos = MAX (self->select_info->selection_end, self->select_info->selection_anchor);
break;
case GTK_MOVEMENT_DISPLAY_LINE_ENDS:
case GTK_MOVEMENT_PARAGRAPH_ENDS:
case GTK_MOVEMENT_BUFFER_ENDS:
/* FIXME: Can do better here */
new_pos = count < 0 ? 0 : strlen (self->text);
break;
case GTK_MOVEMENT_DISPLAY_LINES:
case GTK_MOVEMENT_PARAGRAPHS:
case GTK_MOVEMENT_PAGES:
case GTK_MOVEMENT_HORIZONTAL_PAGES:
default:
break;
}
}
else
{
switch (step)
{
case GTK_MOVEMENT_LOGICAL_POSITIONS:
new_pos = gtk_label_move_logically (self, new_pos, count);
break;
case GTK_MOVEMENT_VISUAL_POSITIONS:
new_pos = gtk_label_move_visually (self, new_pos, count);
if (new_pos == old_pos)
{
if (!extend_selection)
{
if (!gtk_widget_keynav_failed (GTK_WIDGET (self),
count > 0 ?
GTK_DIR_RIGHT : GTK_DIR_LEFT))
{
GtkRoot *root = gtk_widget_get_root (GTK_WIDGET (self));
if (root)
gtk_widget_child_focus (GTK_WIDGET (root), count > 0 ? GTK_DIR_RIGHT : GTK_DIR_LEFT);
}
}
else
{
gtk_widget_error_bell (GTK_WIDGET (self));
}
}
break;
case GTK_MOVEMENT_WORDS:
while (count > 0)
{
new_pos = gtk_label_move_forward_word (self, new_pos);
count--;
}
while (count < 0)
{
new_pos = gtk_label_move_backward_word (self, new_pos);
count++;
}
if (new_pos == old_pos)
gtk_widget_error_bell (GTK_WIDGET (self));
break;
case GTK_MOVEMENT_DISPLAY_LINE_ENDS:
case GTK_MOVEMENT_PARAGRAPH_ENDS:
case GTK_MOVEMENT_BUFFER_ENDS:
/* FIXME: Can do better here */
new_pos = count < 0 ? 0 : strlen (self->text);
if (new_pos == old_pos)
gtk_widget_error_bell (GTK_WIDGET (self));
break;
case GTK_MOVEMENT_DISPLAY_LINES:
case GTK_MOVEMENT_PARAGRAPHS:
case GTK_MOVEMENT_PAGES:
case GTK_MOVEMENT_HORIZONTAL_PAGES:
default:
break;
}
}
if (extend_selection)
gtk_label_select_region_index (self,
self->select_info->selection_anchor,
new_pos);
else
gtk_label_select_region_index (self, new_pos, new_pos);
}
static void
gtk_label_copy_clipboard (GtkLabel *self)
{
if (self->text && self->select_info)
{
int start, end;
int len;
GdkClipboard *clipboard;
start = MIN (self->select_info->selection_anchor,
self->select_info->selection_end);
end = MAX (self->select_info->selection_anchor,
self->select_info->selection_end);
len = strlen (self->text);
if (end > len)
end = len;
if (start > len)
start = len;
clipboard = gtk_widget_get_clipboard (GTK_WIDGET (self));
if (start != end)
{
char *str = g_strndup (self->text + start, end - start);
gdk_clipboard_set_text (clipboard, str);
g_free (str);
}
else
{
GtkLabelLink *link;
link = gtk_label_get_focus_link (self, NULL);
if (link)
gdk_clipboard_set_text (clipboard, link->uri);
}
}
}
static void
gtk_label_select_all (GtkLabel *self)
{
gtk_label_select_region_index (self, 0, strlen (self->text));
}
static void
gtk_label_activate_link_open (GtkWidget *widget,
const char *name,
GVariant *parameter)
{
GtkLabel *self = GTK_LABEL (widget);
GtkLabelLink *link = self->select_info->context_link;
if (link)
emit_activate_link (self, link);
}
static void
gtk_label_activate_link_copy (GtkWidget *widget,
const char *name,
GVariant *parameter)
{
GtkLabel *self = GTK_LABEL (widget);
GtkLabelLink *link = self->select_info->context_link;
if (link)
{
GdkClipboard *clipboard;
clipboard = gtk_widget_get_clipboard (widget);
gdk_clipboard_set_text (clipboard, link->uri);
}
else
g_print ("no link ?!\n");
}
static void
gtk_label_activate_clipboard_copy (GtkWidget *widget,
const char *name,
GVariant *parameter)
{
g_signal_emit_by_name (widget, "copy-clipboard");
}
static void
gtk_label_activate_selection_select_all (GtkWidget *widget,
const char *name,
GVariant *parameter)
{
gtk_label_select_all (GTK_LABEL (widget));
}
static void
gtk_label_nop (GtkWidget *widget,
const char *name,
GVariant *parameter)
{
}
static void
gtk_label_update_actions (GtkLabel *self)
{
GtkWidget *widget = GTK_WIDGET (self);
gboolean has_selection;
GtkLabelLink *link;
if (self->select_info)
{
has_selection = self->select_info->selection_anchor != self->select_info->selection_end;
link = self->select_info->active_link;
}
else
{
has_selection = FALSE;
link = gtk_label_get_focus_link (self, NULL);
}
gtk_widget_action_set_enabled (widget, "clipboard.cut", FALSE);
gtk_widget_action_set_enabled (widget, "clipboard.copy", has_selection);
gtk_widget_action_set_enabled (widget, "clipboard.paste", FALSE);
gtk_widget_action_set_enabled (widget, "selection.select-all",
gtk_label_get_selectable (self));
gtk_widget_action_set_enabled (widget, "selection.delete", FALSE);
gtk_widget_action_set_enabled (widget, "link.open", !has_selection && link);
gtk_widget_action_set_enabled (widget, "link.copy", !has_selection && link);
}
static GMenuModel *
gtk_label_get_menu_model (GtkLabel *self)
{
GMenu *menu, *section;
GMenuItem *item;
menu = g_menu_new ();
section = g_menu_new ();
g_menu_append (section, _("Cu_t"), "clipboard.cut");
g_menu_append (section, _("_Copy"), "clipboard.copy");
g_menu_append (section, _("_Paste"), "clipboard.paste");
g_menu_append (section, _("_Delete"), "selection.delete");
g_menu_append_section (menu, NULL, G_MENU_MODEL (section));
g_object_unref (section);
section = g_menu_new ();
g_menu_append (section, _("Select _All"), "selection.select-all");
g_menu_append_section (menu, NULL, G_MENU_MODEL (section));
g_object_unref (section);
section = g_menu_new ();
item = g_menu_item_new (_("_Open Link"), "link.open");
g_menu_item_set_attribute (item, "hidden-when", "s", "action-disabled");
g_menu_append_item (section, item);
g_object_unref (item);
item = g_menu_item_new (_("Copy _Link Address"), "link.copy");
g_menu_item_set_attribute (item, "hidden-when", "s", "action-disabled");
g_menu_append_item (section, item);
g_object_unref (item);
g_menu_append_section (menu, NULL, G_MENU_MODEL (section));
g_object_unref (section);
if (self->extra_menu)
g_menu_append_section (menu, NULL, self->extra_menu);
return G_MENU_MODEL (menu);
}
static void
gtk_label_do_popup (GtkLabel *self,
double x,
double y)
{
if (!self->select_info)
return;
if (self->select_info->link_clicked)
self->select_info->context_link = self->select_info->active_link;
else
self->select_info->context_link = gtk_label_get_focus_link (self, NULL);
gtk_label_update_actions (self);
if (!self->popup_menu)
{
GMenuModel *model;
model = gtk_label_get_menu_model (self);
self->popup_menu = gtk_popover_menu_new_from_model (model);
gtk_widget_set_parent (self->popup_menu, GTK_WIDGET (self));
gtk_popover_set_position (GTK_POPOVER (self->popup_menu), GTK_POS_BOTTOM);
gtk_popover_set_has_arrow (GTK_POPOVER (self->popup_menu), FALSE);
gtk_widget_set_halign (self->popup_menu, GTK_ALIGN_START);
g_object_unref (model);
}
if (x != -1 && y != -1)
{
GdkRectangle rect = { x, y, 1, 1 };
gtk_popover_set_pointing_to (GTK_POPOVER (self->popup_menu), &rect);
}
else
gtk_popover_set_pointing_to (GTK_POPOVER (self->popup_menu), NULL);
gtk_popover_popup (GTK_POPOVER (self->popup_menu));
}
static void
gtk_label_popup_menu (GtkWidget *widget,
const char *action_name,
GVariant *parameters)
{
GtkLabel *self = GTK_LABEL (widget);
gtk_label_do_popup (self, -1, -1);
}
static void
gtk_label_clear_links (GtkLabel *self)
{
guint i;
if (!self->select_info)
return;
for (i = 0; i < self->select_info->n_links; i++)
link_free (&self->select_info->links[i]);
g_free (self->select_info->links);
self->select_info->links = NULL;
self->select_info->n_links = 0;
self->select_info->active_link = NULL;
gtk_widget_remove_css_class (GTK_WIDGET (self), "link");
}
static gboolean
gtk_label_activate_link (GtkLabel *self,
const char *uri)
{
GtkWidget *widget = GTK_WIDGET (self);
GtkWidget *toplevel = GTK_WIDGET (gtk_widget_get_root (widget));
if (!GTK_IS_WINDOW (toplevel))
return FALSE;
gtk_show_uri (GTK_WINDOW (toplevel), uri, GDK_CURRENT_TIME);
return TRUE;
}
static void
emit_activate_link (GtkLabel *self,
GtkLabelLink *link)
{
gboolean handled;
g_signal_emit (self, signals[ACTIVATE_LINK], 0, link->uri, &handled);
/* signal handler might have invalidated the layout */
if (!self->layout)
return;
if (handled && !link->visited &&
self->select_info && self->select_info->links)
{
link->visited = TRUE;
update_link_state (self);
}
}
static void
gtk_label_activate_current_link (GtkLabel *self)
{
GtkLabelLink *link;
GtkWidget *widget = GTK_WIDGET (self);
link = gtk_label_get_focus_link (self, NULL);
if (link)
emit_activate_link (self, link);
else
gtk_widget_activate_default (widget);
}
/**
* gtk_label_get_current_uri:
* @self: a #GtkLabel
*
* Returns the URI for the currently active link in the label.
* The active link is the one under the mouse pointer or, in a
* selectable label, the link in which the text cursor is currently
* positioned.
*
* This function is intended for use in a #GtkLabel::activate-link handler
* or for use in a #GtkWidget::query-tooltip handler.
*
* Returns: (nullable): the currently active URI or %NULL if there is none.
* The string is owned by GTK and must not be freed or modified.
*/
const char *
gtk_label_get_current_uri (GtkLabel *self)
{
const GtkLabelLink *link;
g_return_val_if_fail (GTK_IS_LABEL (self), NULL);
if (!self->select_info)
return NULL;
if (self->select_info->link_clicked)
link = self->select_info->active_link;
else
link = gtk_label_get_focus_link (self, NULL);
if (link)
return link->uri;
return NULL;
}
static gboolean
gtk_label_query_tooltip (GtkWidget *widget,
int x,
int y,
gboolean keyboard_tip,
GtkTooltip *tooltip)
{
GtkLabel *self = GTK_LABEL (widget);
GtkLabelSelectionInfo *info = self->select_info;
int index = -1;
if (info && info->links)
{
if (keyboard_tip)
{
if (info->selection_anchor == info->selection_end)
index = info->selection_anchor;
}
else
{
if (!get_layout_index (self, x, y, &index))
index = -1;
}
if (index != -1)
{
const int link_index = _gtk_label_get_link_at (self, index);
if (link_index != -1)
{
const GtkLabelLink *link = &info->links[link_index];
if (link->title)
{
gtk_tooltip_set_markup (tooltip, link->title);
}
}
}
}
return GTK_WIDGET_CLASS (gtk_label_parent_class)->query_tooltip (widget,
x, y,
keyboard_tip,
tooltip);
}
int
_gtk_label_get_cursor_position (GtkLabel *self)
{
if (self->select_info && self->select_info->selectable)
return g_utf8_pointer_to_offset (self->text,
self->text + self->select_info->selection_end);
return 0;
}
int
_gtk_label_get_selection_bound (GtkLabel *self)
{
if (self->select_info && self->select_info->selectable)
return g_utf8_pointer_to_offset (self->text,
self->text + self->select_info->selection_anchor);
return 0;
}
/**
* gtk_label_set_lines:
* @self: a #GtkLabel
* @lines: the desired number of lines, or -1
*
* Sets the number of lines to which an ellipsized, wrapping label
* should be limited. This has no effect if the label is not wrapping
* or ellipsized. Set this to -1 if you don’t want to limit the
* number of lines.
*/
void
gtk_label_set_lines (GtkLabel *self,
int lines)
{
g_return_if_fail (GTK_IS_LABEL (self));
if (self->lines != lines)
{
self->lines = lines;
gtk_label_clear_layout (self);
g_object_notify_by_pspec (G_OBJECT (self), label_props[PROP_LINES]);
gtk_widget_queue_resize (GTK_WIDGET (self));
}
}
/**
* gtk_label_get_lines:
* @self: a #GtkLabel
*
* Gets the number of lines to which an ellipsized, wrapping
* label should be limited. See gtk_label_set_lines().
*
* Returns: The number of lines
*/
int
gtk_label_get_lines (GtkLabel *self)
{
g_return_val_if_fail (GTK_IS_LABEL (self), -1);
return self->lines;
}
int
_gtk_label_get_n_links (GtkLabel *self)
{
if (self->select_info)
return self->select_info->n_links;
return 0;
}
const char *
_gtk_label_get_link_uri (GtkLabel *self,
int idx)
{
if (self->select_info)
return self->select_info->links[idx].uri;
return NULL;
}
void
_gtk_label_get_link_extent (GtkLabel *self,
int idx,
int *start,
int *end)
{
if (self->select_info)
{
const GtkLabelLink *link = &self->select_info->links[idx];
*start = link->start;
*end = link->end;
}
else
{
*start = -1;
*end = -1;
}
}
int
_gtk_label_get_link_at (GtkLabel *self,
int pos)
{
if (self->select_info)
{
guint i;
for (i = 0; i < self->select_info->n_links; i++)
{
const GtkLabelLink *link = &self->select_info->links[i];
if (link->start <= pos && pos < link->end)
return i;
}
}
return -1;
}
void
_gtk_label_activate_link (GtkLabel *self,
int idx)
{
if (self->select_info)
{
GtkLabelLink *link = &self->select_info->links[idx];
emit_activate_link (self, link);
}
}
gboolean
_gtk_label_get_link_visited (GtkLabel *self,
int idx)
{
if (self->select_info)
return self->select_info->links[idx].visited;
return FALSE;
}
gboolean
_gtk_label_get_link_focused (GtkLabel *self,
int idx)
{
GtkLabelSelectionInfo *info = self->select_info;
if (!info)
return FALSE;
if (info->selection_anchor != info->selection_end)
return FALSE;
if (idx >= 0 && idx < info->n_links)
{
const GtkLabelLink *link = &info->links[idx];
if (link->start <= info->selection_anchor &&
info->selection_anchor <= link->end)
return TRUE;
}
return FALSE;
}
/**
* gtk_label_set_xalign:
* @self: a #GtkLabel
* @xalign: the new xalign value, between 0 and 1
*
* Sets the #GtkLabel:xalign property for @label.
*/
void
gtk_label_set_xalign (GtkLabel *self,
float xalign)
{
g_return_if_fail (GTK_IS_LABEL (self));
xalign = CLAMP (xalign, 0.0, 1.0);
if (self->xalign == xalign)
return;
self->xalign = xalign;
gtk_widget_queue_draw (GTK_WIDGET (self));
g_object_notify_by_pspec (G_OBJECT (self), label_props[PROP_XALIGN]);
}
/**
* gtk_label_get_xalign:
* @self: a #GtkLabel
*
* Gets the #GtkLabel:xalign property for @label.
*
* Returns: the xalign property
*/
float
gtk_label_get_xalign (GtkLabel *self)
{
g_return_val_if_fail (GTK_IS_LABEL (self), 0.5);
return self->xalign;
}
/**
* gtk_label_set_yalign:
* @self: a #GtkLabel
* @yalign: the new yalign value, between 0 and 1
*
* Sets the #GtkLabel:yalign property for @label.
*/
void
gtk_label_set_yalign (GtkLabel *self,
float yalign)
{
g_return_if_fail (GTK_IS_LABEL (self));
yalign = CLAMP (yalign, 0.0, 1.0);
if (self->yalign == yalign)
return;
self->yalign = yalign;
gtk_widget_queue_draw (GTK_WIDGET (self));
g_object_notify_by_pspec (G_OBJECT (self), label_props[PROP_YALIGN]);
}
/**
* gtk_label_get_yalign:
* @self: a #GtkLabel
*
* Gets the #GtkLabel:yalign property for @label.
*
* Returns: the yalign property
*/
float
gtk_label_get_yalign (GtkLabel *self)
{
g_return_val_if_fail (GTK_IS_LABEL (self), 0.5);
return self->yalign;
}
/**
* gtk_label_set_extra_menu:
* @self: a #GtkLabel
* @model: (allow-none): a #GMenuModel
*
* Sets a menu model to add when constructing
* the context menu for @label.
*/
void
gtk_label_set_extra_menu (GtkLabel *self,
GMenuModel *model)
{
g_return_if_fail (GTK_IS_LABEL (self));
if (g_set_object (&self->extra_menu, model))
{
g_clear_pointer (&self->popup_menu, gtk_widget_unparent);
g_object_notify_by_pspec (G_OBJECT (self), label_props[PROP_EXTRA_MENU]);
}
}
/**
* gtk_label_get_extra_menu:
* @self: a #GtkLabel
*
* Gets the menu model set with gtk_label_set_extra_menu().
*
* Returns: (transfer none) (nullable): the menu model
*/
GMenuModel *
gtk_label_get_extra_menu (GtkLabel *self)
{
g_return_val_if_fail (GTK_IS_LABEL (self), NULL);
return self->extra_menu;
}
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