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gtk2/gtk/gtktexthandle.c

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/* GTK - The GIMP Toolkit
* Copyright © 2012 Carlos Garnacho <carlosg@gnome.org>
*
* 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/>.
*/
#include "config.h"
#include "gtkprivatetypebuiltins.h"
#include "gtktexthandleprivate.h"
#include "gtkmarshalers.h"
#include "gtkprivate.h"
#include "gtkintl.h"
#include <gtk/gtk.h>
typedef struct _GtkTextHandlePrivate GtkTextHandlePrivate;
typedef struct _HandleWindow HandleWindow;
enum {
HANDLE_DRAGGED,
DRAG_FINISHED,
LAST_SIGNAL
};
enum {
PROP_0,
PROP_PARENT,
PROP_RELATIVE_TO
};
struct _HandleWindow
{
GdkWindow *window;
GdkRectangle pointing_to;
gint dx;
gint dy;
guint dragged : 1;
guint mode_visible : 1;
guint user_visible : 1;
guint has_point : 1;
};
struct _GtkTextHandlePrivate
{
HandleWindow windows[2];
GtkWidget *parent;
GdkWindow *relative_to;
GtkStyleContext *style_context;
gulong draw_signal_id;
gulong event_signal_id;
gulong style_updated_id;
gulong composited_changed_id;
guint realized : 1;
guint mode : 2;
};
G_DEFINE_TYPE_WITH_PRIVATE (GtkTextHandle, _gtk_text_handle, G_TYPE_OBJECT)
static guint signals[LAST_SIGNAL] = { 0 };
static void
_gtk_text_handle_get_size (GtkTextHandle *handle,
gint *width,
gint *height)
{
GtkTextHandlePrivate *priv;
gint w, h;
priv = handle->priv;
gtk_widget_style_get (priv->parent,
"text-handle-width", &w,
"text-handle-height", &h,
NULL);
if (width)
*width = w;
if (height)
*height = h;
}
static void
_gtk_text_handle_draw (GtkTextHandle *handle,
cairo_t *cr,
GtkTextHandlePosition pos)
{
GtkTextHandlePrivate *priv;
gint width, height;
priv = handle->priv;
cairo_save (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
cairo_set_source_rgba (cr, 0, 0, 0, 0);
cairo_paint (cr);
if (pos == GTK_TEXT_HANDLE_POSITION_SELECTION_END)
cairo_translate (cr, 0, priv->windows[pos].pointing_to.height);
gtk_style_context_save (priv->style_context);
gtk_style_context_add_class (priv->style_context,
GTK_STYLE_CLASS_CURSOR_HANDLE);
if (pos == GTK_TEXT_HANDLE_POSITION_SELECTION_END)
{
gtk_style_context_add_class (priv->style_context,
GTK_STYLE_CLASS_BOTTOM);
if (priv->mode == GTK_TEXT_HANDLE_MODE_CURSOR)
gtk_style_context_add_class (priv->style_context,
GTK_STYLE_CLASS_INSERTION_CURSOR);
}
else
gtk_style_context_add_class (priv->style_context,
GTK_STYLE_CLASS_TOP);
_gtk_text_handle_get_size (handle, &width, &height);
gtk_render_background (priv->style_context, cr, 0, 0, width, height);
gtk_style_context_restore (priv->style_context);
cairo_restore (cr);
}
static void
_gtk_text_handle_update_shape (GtkTextHandle *handle,
GdkWindow *window,
GtkTextHandlePosition pos)
{
GtkTextHandlePrivate *priv;
cairo_rectangle_int_t rect;
cairo_surface_t *surface;
cairo_region_t *region;
cairo_t *cr;
priv = handle->priv;
surface =
gdk_window_create_similar_surface (window,
CAIRO_CONTENT_COLOR_ALPHA,
gdk_window_get_width (window),
gdk_window_get_height (window));
cr = cairo_create (surface);
_gtk_text_handle_draw (handle, cr, pos);
cairo_destroy (cr);
region = gdk_cairo_region_create_from_surface (surface);
if (gtk_widget_is_composited (priv->parent))
gdk_window_shape_combine_region (window, NULL, 0, 0);
else
gdk_window_shape_combine_region (window, region, 0, 0);
cairo_region_get_extents (region, &rect);
cairo_region_destroy (region);
/* Preserve x/width, but extend input shape
* vertically to all window height */
rect.y = 0;
rect.height = gdk_window_get_height (window);
region = cairo_region_create_rectangle (&rect);
gdk_window_input_shape_combine_region (window, region, 0, 0);
cairo_surface_destroy (surface);
cairo_region_destroy (region);
}
static GdkWindow *
_gtk_text_handle_create_window (GtkTextHandle *handle,
GtkTextHandlePosition pos)
{
GtkTextHandlePrivate *priv;
GdkRGBA bg = { 0, 0, 0, 0 };
GdkWindowAttr attributes;
GdkWindow *window;
GdkVisual *visual;
gint mask;
priv = handle->priv;
attributes.x = 0;
attributes.y = 0;
_gtk_text_handle_get_size (handle, &attributes.width, &attributes.height);
attributes.window_type = GDK_WINDOW_TEMP;
attributes.wclass = GDK_INPUT_OUTPUT;
attributes.event_mask = (GDK_EXPOSURE_MASK |
GDK_BUTTON_PRESS_MASK |
GDK_BUTTON_RELEASE_MASK |
GDK_BUTTON1_MOTION_MASK);
mask = GDK_WA_X | GDK_WA_Y;
visual = gdk_screen_get_rgba_visual (gtk_widget_get_screen (priv->parent));
if (visual)
{
attributes.visual = visual;
mask |= GDK_WA_VISUAL;
}
window = gdk_window_new (gtk_widget_get_root_window (priv->parent),
&attributes, mask);
gtk_widget_register_window (priv->parent, window);
gdk_window_set_background_rgba (window, &bg);
_gtk_text_handle_update_shape (handle, window, pos);
return window;
}
static gboolean
gtk_text_handle_widget_draw (GtkWidget *widget,
cairo_t *cr,
GtkTextHandle *handle)
{
GtkTextHandlePrivate *priv;
GtkTextHandlePosition pos;
HandleWindow *handle_window;
priv = handle->priv;
if (!priv->realized)
return FALSE;
if (gtk_cairo_should_draw_window (cr, priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_START].window))
pos = GTK_TEXT_HANDLE_POSITION_SELECTION_START;
else if (gtk_cairo_should_draw_window (cr, priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_END].window))
pos = GTK_TEXT_HANDLE_POSITION_SELECTION_END;
else
return FALSE;
handle_window = &priv->windows[pos];
if (gdk_window_is_visible (handle_window->window))
_gtk_text_handle_draw (handle, cr, pos);
return FALSE;
}
static gboolean
gtk_text_handle_widget_event (GtkWidget *widget,
GdkEvent *event,
GtkTextHandle *handle)
{
GtkTextHandlePrivate *priv;
GtkTextHandlePosition pos;
priv = handle->priv;
if (event->any.window == priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_START].window)
pos = GTK_TEXT_HANDLE_POSITION_SELECTION_START;
else if (event->any.window == priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_END].window)
pos = GTK_TEXT_HANDLE_POSITION_SELECTION_END;
else
return FALSE;
if (event->type == GDK_BUTTON_PRESS)
{
priv->windows[pos].dx = event->button.x;
priv->windows[pos].dy = event->button.y;
priv->windows[pos].dragged = TRUE;
}
else if (event->type == GDK_BUTTON_RELEASE)
{
g_signal_emit (handle, signals[DRAG_FINISHED], 0, pos);
priv->windows[pos].dx = priv->windows[pos].dy = 0;
priv->windows[pos].dragged = FALSE;
}
else if (event->type == GDK_MOTION_NOTIFY && priv->windows[pos].dragged)
{
gint x, y, width, height;
_gtk_text_handle_get_size (handle, &width, &height);
gdk_window_get_origin (priv->relative_to, &x, &y);
x = event->motion.x_root - priv->windows[pos].dx + (width / 2) - x;
y = event->motion.y_root - priv->windows[pos].dy - y;
if (pos == GTK_TEXT_HANDLE_POSITION_SELECTION_START)
y += height;
y += priv->windows[pos].pointing_to.height / 2;
g_signal_emit (handle, signals[HANDLE_DRAGGED], 0, pos, x, y);
}
return TRUE;
}
static void
_gtk_text_handle_update_window_state (GtkTextHandle *handle,
GtkTextHandlePosition pos)
{
GtkTextHandlePrivate *priv;
HandleWindow *handle_window;
priv = handle->priv;
handle_window = &priv->windows[pos];
if (!handle_window->window)
return;
if (handle_window->has_point &&
handle_window->mode_visible && handle_window->user_visible)
{
gint x, y, width, height;
x = handle_window->pointing_to.x;
y = handle_window->pointing_to.y;
_gtk_text_handle_get_size (handle, &width, &height);
if (pos != GTK_TEXT_HANDLE_POSITION_CURSOR)
y -= height;
height += handle_window->pointing_to.height;
x -= width / 2;
gdk_window_move_resize (handle_window->window, x, y, width, height);
gdk_window_show (handle_window->window);
}
else
gdk_window_hide (handle_window->window);
}
static void
_gtk_text_handle_update_window (GtkTextHandle *handle,
GtkTextHandlePosition pos,
gboolean recreate)
{
GtkTextHandlePrivate *priv;
HandleWindow *handle_window;
priv = handle->priv;
handle_window = &priv->windows[pos];
if (!handle_window->window)
return;
if (recreate)
{
gtk_widget_unregister_window (priv->parent, handle_window->window);
gdk_window_destroy (handle_window->window);
handle_window->window = _gtk_text_handle_create_window (handle, pos);
}
_gtk_text_handle_update_window_state (handle, pos);
}
static void
_gtk_text_handle_update_windows (GtkTextHandle *handle)
{
GtkTextHandlePrivate *priv = handle->priv;
gtk_style_context_invalidate (priv->style_context);
_gtk_text_handle_update_window (handle, GTK_TEXT_HANDLE_POSITION_SELECTION_START, FALSE);
_gtk_text_handle_update_window (handle, GTK_TEXT_HANDLE_POSITION_SELECTION_END, FALSE);
}
static void
_gtk_text_handle_composited_changed (GtkTextHandle *handle)
{
_gtk_text_handle_update_window (handle, GTK_TEXT_HANDLE_POSITION_SELECTION_START, TRUE);
_gtk_text_handle_update_window (handle, GTK_TEXT_HANDLE_POSITION_SELECTION_END, TRUE);
}
static void
gtk_text_handle_constructed (GObject *object)
{
GtkTextHandlePrivate *priv;
priv = GTK_TEXT_HANDLE (object)->priv;
g_assert (priv->parent != NULL);
priv->draw_signal_id =
g_signal_connect (priv->parent, "draw",
G_CALLBACK (gtk_text_handle_widget_draw),
object);
priv->event_signal_id =
g_signal_connect (priv->parent, "event",
G_CALLBACK (gtk_text_handle_widget_event),
object);
priv->composited_changed_id =
g_signal_connect_swapped (priv->parent, "composited-changed",
G_CALLBACK (_gtk_text_handle_composited_changed),
object);
priv->style_updated_id =
g_signal_connect_swapped (priv->parent, "style-updated",
G_CALLBACK (_gtk_text_handle_update_windows),
object);
}
static void
gtk_text_handle_finalize (GObject *object)
{
GtkTextHandlePrivate *priv;
priv = GTK_TEXT_HANDLE (object)->priv;
if (priv->relative_to)
g_object_unref (priv->relative_to);
if (priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_START].window)
{
gtk_widget_unregister_window (priv->parent,
priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_START].window);
gdk_window_destroy (priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_START].window);
}
if (priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_END].window)
{
gtk_widget_unregister_window (priv->parent,
priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_END].window);
gdk_window_destroy (priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_END].window);
}
if (g_signal_handler_is_connected (priv->parent, priv->draw_signal_id))
g_signal_handler_disconnect (priv->parent, priv->draw_signal_id);
if (g_signal_handler_is_connected (priv->parent, priv->event_signal_id))
g_signal_handler_disconnect (priv->parent, priv->event_signal_id);
if (g_signal_handler_is_connected (priv->parent, priv->composited_changed_id))
g_signal_handler_disconnect (priv->parent, priv->composited_changed_id);
if (g_signal_handler_is_connected (priv->parent, priv->style_updated_id))
g_signal_handler_disconnect (priv->parent, priv->style_updated_id);
g_object_unref (priv->style_context);
G_OBJECT_CLASS (_gtk_text_handle_parent_class)->finalize (object);
}
static void
gtk_text_handle_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkTextHandlePrivate *priv;
GtkTextHandle *handle;
handle = GTK_TEXT_HANDLE (object);
priv = handle->priv;
switch (prop_id)
{
case PROP_PARENT:
priv->parent = g_value_get_object (value);
break;
case PROP_RELATIVE_TO:
_gtk_text_handle_set_relative_to (handle,
g_value_get_object (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
gtk_text_handle_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkTextHandlePrivate *priv;
priv = GTK_TEXT_HANDLE (object)->priv;
switch (prop_id)
{
case PROP_PARENT:
g_value_set_object (value, priv->parent);
break;
case PROP_RELATIVE_TO:
g_value_set_object (value, priv->relative_to);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
_gtk_text_handle_class_init (GtkTextHandleClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->constructed = gtk_text_handle_constructed;
object_class->finalize = gtk_text_handle_finalize;
object_class->set_property = gtk_text_handle_set_property;
object_class->get_property = gtk_text_handle_get_property;
signals[HANDLE_DRAGGED] =
g_signal_new (I_("handle-dragged"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkTextHandleClass, handle_dragged),
NULL, NULL,
_gtk_marshal_VOID__ENUM_INT_INT,
G_TYPE_NONE, 3,
GTK_TYPE_TEXT_HANDLE_POSITION,
G_TYPE_INT, G_TYPE_INT);
signals[DRAG_FINISHED] =
g_signal_new (I_("drag-finished"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST, 0,
NULL, NULL,
g_cclosure_marshal_VOID__ENUM,
G_TYPE_NONE, 1,
GTK_TYPE_TEXT_HANDLE_POSITION);
g_object_class_install_property (object_class,
PROP_PARENT,
g_param_spec_object ("parent",
P_("Parent widget"),
P_("Parent widget"),
GTK_TYPE_WIDGET,
GTK_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY));
g_object_class_install_property (object_class,
PROP_RELATIVE_TO,
g_param_spec_object ("relative-to",
P_("Window"),
P_("Window the coordinates are based upon"),
GDK_TYPE_WINDOW,
GTK_PARAM_READWRITE));
}
static void
_gtk_text_handle_init (GtkTextHandle *handle)
{
GtkTextHandlePrivate *priv;
GtkWidgetPath *path;
handle->priv = priv = _gtk_text_handle_get_instance_private (handle);
path = gtk_widget_path_new ();
gtk_widget_path_append_type (path, GTK_TYPE_TEXT_HANDLE);
priv->style_context = gtk_style_context_new ();
gtk_style_context_set_path (priv->style_context, path);
gtk_widget_path_free (path);
}
GtkTextHandle *
_gtk_text_handle_new (GtkWidget *parent)
{
return g_object_new (GTK_TYPE_TEXT_HANDLE,
"parent", parent,
NULL);
}
void
_gtk_text_handle_set_relative_to (GtkTextHandle *handle,
GdkWindow *window)
{
GtkTextHandlePrivate *priv;
g_return_if_fail (GTK_IS_TEXT_HANDLE (handle));
g_return_if_fail (!window || GDK_IS_WINDOW (window));
priv = handle->priv;
if (priv->relative_to)
{
gtk_widget_unregister_window (priv->parent,
priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_START].window);
gdk_window_destroy (priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_START].window);
gtk_widget_unregister_window (priv->parent,
priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_END].window);
gdk_window_destroy (priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_END].window);
g_object_unref (priv->relative_to);
}
if (window)
{
priv->relative_to = g_object_ref (window);
priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_START].window =
_gtk_text_handle_create_window (handle, GTK_TEXT_HANDLE_POSITION_SELECTION_START);
priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_END].window =
_gtk_text_handle_create_window (handle, GTK_TEXT_HANDLE_POSITION_SELECTION_END);
priv->realized = TRUE;
}
else
{
priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_START].window = NULL;
priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_END].window = NULL;
priv->relative_to = NULL;
priv->realized = FALSE;
}
g_object_notify (G_OBJECT (handle), "relative-to");
}
void
_gtk_text_handle_set_mode (GtkTextHandle *handle,
GtkTextHandleMode mode)
{
GtkTextHandlePrivate *priv;
g_return_if_fail (GTK_IS_TEXT_HANDLE (handle));
priv = handle->priv;
if (priv->mode == mode)
return;
priv->mode = mode;
switch (mode)
{
case GTK_TEXT_HANDLE_MODE_CURSOR:
priv->windows[GTK_TEXT_HANDLE_POSITION_CURSOR].mode_visible = TRUE;
priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_START].mode_visible = FALSE;
break;
case GTK_TEXT_HANDLE_MODE_SELECTION:
priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_START].mode_visible = TRUE;
priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_END].mode_visible = TRUE;
break;
case GTK_TEXT_HANDLE_MODE_NONE:
default:
priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_START].mode_visible = FALSE;
priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_END].mode_visible = FALSE;
break;
}
_gtk_text_handle_update_shape (handle,
priv->windows[GTK_TEXT_HANDLE_POSITION_CURSOR].window,
GTK_TEXT_HANDLE_POSITION_CURSOR);
_gtk_text_handle_update_shape (handle,
priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_START].window,
GTK_TEXT_HANDLE_POSITION_SELECTION_START);
_gtk_text_handle_update_window_state (handle, GTK_TEXT_HANDLE_POSITION_SELECTION_START);
_gtk_text_handle_update_window_state (handle, GTK_TEXT_HANDLE_POSITION_SELECTION_END);
}
GtkTextHandleMode
_gtk_text_handle_get_mode (GtkTextHandle *handle)
{
GtkTextHandlePrivate *priv;
g_return_val_if_fail (GTK_IS_TEXT_HANDLE (handle), GTK_TEXT_HANDLE_MODE_NONE);
priv = handle->priv;
return priv->mode;
}
void
_gtk_text_handle_set_position (GtkTextHandle *handle,
GtkTextHandlePosition pos,
GdkRectangle *rect)
{
GtkTextHandlePrivate *priv;
HandleWindow *handle_window;
gboolean size_changed;
g_return_if_fail (GTK_IS_TEXT_HANDLE (handle));
priv = handle->priv;
pos = CLAMP (pos, GTK_TEXT_HANDLE_POSITION_CURSOR,
GTK_TEXT_HANDLE_POSITION_SELECTION_START);
handle_window = &priv->windows[pos];
if (!priv->realized)
return;
if (priv->mode == GTK_TEXT_HANDLE_MODE_NONE ||
(priv->mode == GTK_TEXT_HANDLE_MODE_CURSOR &&
pos != GTK_TEXT_HANDLE_POSITION_CURSOR))
return;
size_changed = (rect->width != handle_window->pointing_to.width ||
rect->height != handle_window->pointing_to.height);
handle_window->pointing_to = *rect;
handle_window->has_point = TRUE;
gdk_window_get_root_coords (priv->relative_to,
rect->x, rect->y,
&handle_window->pointing_to.x,
&handle_window->pointing_to.y);
_gtk_text_handle_update_window_state (handle, pos);
if (size_changed)
_gtk_text_handle_update_shape (handle, handle_window->window, pos);
}
void
_gtk_text_handle_set_visible (GtkTextHandle *handle,
GtkTextHandlePosition pos,
gboolean visible)
{
GtkTextHandlePrivate *priv;
GdkWindow *window;
g_return_if_fail (GTK_IS_TEXT_HANDLE (handle));
priv = handle->priv;
pos = CLAMP (pos, GTK_TEXT_HANDLE_POSITION_CURSOR,
GTK_TEXT_HANDLE_POSITION_SELECTION_START);
if (!priv->realized)
return;
window = priv->windows[pos].window;
if (!window)
return;
if (!gdk_window_is_visible (window))
_gtk_text_handle_update_shape (handle, window, pos);
priv->windows[pos].user_visible = visible;
_gtk_text_handle_update_window_state (handle, pos);
}
gboolean
_gtk_text_handle_get_is_dragged (GtkTextHandle *handle,
GtkTextHandlePosition pos)
{
GtkTextHandlePrivate *priv;
g_return_val_if_fail (GTK_IS_TEXT_HANDLE (handle), FALSE);
priv = handle->priv;
pos = CLAMP (pos, GTK_TEXT_HANDLE_POSITION_CURSOR,
GTK_TEXT_HANDLE_POSITION_SELECTION_START);
return priv->windows[pos].dragged;
}
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