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 "gtktexthandleprivate.h"
#include "gtkbinlayout.h"
#include "gtkcssboxesimplprivate.h"
#include "gtkcssnodeprivate.h"
#include "gtkgesturedrag.h"
#include "gtkgizmoprivate.h"
#include "gtkintl.h"
#include "gtkmarshalers.h"
#include "gtknativeprivate.h"
#include "gtkprivatetypebuiltins.h"
#include "gtkrendericonprivate.h"
#include "gtkwidgetprivate.h"
#include "gtkwindowprivate.h"
#include "gdk/gdksurfaceprivate.h"
enum {
DRAG_STARTED,
HANDLE_DRAGGED,
DRAG_FINISHED,
LAST_SIGNAL
};
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struct _GtkTextHandle
{
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GtkWidget parent_instance;
GdkSurface *surface;
GskRenderer *renderer;
GtkEventController *controller;
GtkWidget *controller_widget;
GtkWidget *contents;
GdkRectangle pointing_to;
GtkBorder border;
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int dx;
int dy;
guint role : 2;
guint dragged : 1;
guint mode_visible : 1;
guint user_visible : 1;
guint has_point : 1;
};
static void gtk_text_handle_native_interface_init (GtkNativeInterface *iface);
static void handle_drag_begin (GtkGestureDrag *gesture,
double x,
double y,
GtkTextHandle *handle);
static void handle_drag_update (GtkGestureDrag *gesture,
double offset_x,
double offset_y,
GtkWidget *widget);
static void handle_drag_end (GtkGestureDrag *gesture,
double offset_x,
double offset_y,
GtkTextHandle *handle);
G_DEFINE_TYPE_WITH_CODE (GtkTextHandle, gtk_text_handle, GTK_TYPE_WIDGET,
G_IMPLEMENT_INTERFACE (GTK_TYPE_NATIVE,
gtk_text_handle_native_interface_init))
static guint signals[LAST_SIGNAL] = { 0 };
static GdkSurface *
gtk_text_handle_native_get_surface (GtkNative *native)
{
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return GTK_TEXT_HANDLE (native)->surface;
}
static GskRenderer *
gtk_text_handle_native_get_renderer (GtkNative *native)
{
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return GTK_TEXT_HANDLE (native)->renderer;
}
static void
gtk_text_handle_native_get_surface_transform (GtkNative *native,
double *x,
double *y)
{
GtkCssBoxes css_boxes;
const graphene_rect_t *margin_rect;
gtk_css_boxes_init (&css_boxes, GTK_WIDGET (native));
margin_rect = gtk_css_boxes_get_margin_rect (&css_boxes);
*x = - margin_rect->origin.x;
*y = - margin_rect->origin.y;
}
static void
gtk_text_handle_get_padding (GtkTextHandle *handle,
GtkBorder *padding)
{
GtkWidget *widget = GTK_WIDGET (handle);
GtkCssStyle *style = gtk_css_node_get_style (gtk_widget_get_css_node (widget));
padding->left = _gtk_css_number_value_get (style->size->padding_left, 100);
padding->right = _gtk_css_number_value_get (style->size->padding_right, 100);
padding->top = _gtk_css_number_value_get (style->size->padding_top, 100);
padding->bottom = _gtk_css_number_value_get (style->size->padding_bottom, 100);
}
static void
gtk_text_handle_present_surface (GtkTextHandle *handle)
{
GtkWidget *widget = GTK_WIDGET (handle);
GdkPopupLayout *layout;
GdkRectangle rect;
GtkRequisition req;
GtkWidget *parent;
gtk_widget_get_preferred_size (widget, NULL, &req);
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gtk_text_handle_get_padding (handle, &handle->border);
parent = gtk_widget_get_parent (widget);
gtk_widget_get_surface_allocation (parent, &rect);
rect.x += handle->pointing_to.x;
rect.y += handle->pointing_to.y + handle->pointing_to.height - handle->border.top;
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rect.width = req.width - handle->border.left - handle->border.right;
rect.height = 1;
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if (handle->role == GTK_TEXT_HANDLE_ROLE_CURSOR)
rect.x -= rect.width / 2;
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else if ((handle->role == GTK_TEXT_HANDLE_ROLE_SELECTION_END &&
gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL) ||
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(handle->role == GTK_TEXT_HANDLE_ROLE_SELECTION_START &&
gtk_widget_get_direction (widget) != GTK_TEXT_DIR_RTL))
rect.x -= rect.width;
layout = gdk_popup_layout_new (&rect,
GDK_GRAVITY_SOUTH,
GDK_GRAVITY_NORTH);
gdk_popup_layout_set_anchor_hints (layout,
GDK_ANCHOR_FLIP_Y | GDK_ANCHOR_SLIDE_X);
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gdk_popup_present (GDK_POPUP (handle->surface),
MAX (req.width, 1),
MAX (req.height, 1),
layout);
gdk_popup_layout_unref (layout);
}
void
gtk_text_handle_present (GtkTextHandle *handle)
{
GtkWidget *widget = GTK_WIDGET (handle);
if (!_gtk_widget_get_alloc_needed (widget))
gtk_widget_ensure_allocate (widget);
else if (gtk_widget_get_visible (widget))
gtk_text_handle_present_surface (handle);
}
static void
gtk_text_handle_native_layout (GtkNative *native,
int width,
int height)
{
GtkWidget *widget = GTK_WIDGET (native);
if (_gtk_widget_get_alloc_needed (widget))
gtk_widget_allocate (widget, width, height, -1, NULL);
else
gtk_widget_ensure_allocate (widget);
}
static void
gtk_text_handle_native_interface_init (GtkNativeInterface *iface)
{
iface->get_surface = gtk_text_handle_native_get_surface;
iface->get_renderer = gtk_text_handle_native_get_renderer;
iface->get_surface_transform = gtk_text_handle_native_get_surface_transform;
iface->layout = gtk_text_handle_native_layout;
}
static gboolean
surface_render (GdkSurface *surface,
cairo_region_t *region,
GtkTextHandle *handle)
{
gtk_widget_render (GTK_WIDGET (handle), surface, region);
return TRUE;
}
static void
surface_mapped_changed (GtkWidget *widget)
{
GtkTextHandle *handle = GTK_TEXT_HANDLE (widget);
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gtk_widget_set_visible (widget, gdk_surface_get_mapped (handle->surface));
}
static void
gtk_text_handle_snapshot (GtkWidget *widget,
GtkSnapshot *snapshot)
{
GtkCssStyle *style = gtk_css_node_get_style (gtk_widget_get_css_node (widget));
gtk_css_style_snapshot_icon (style,
snapshot,
gtk_widget_get_width (widget),
gtk_widget_get_height (widget));
GTK_WIDGET_CLASS (gtk_text_handle_parent_class)->snapshot (widget, snapshot);
}
static void
gtk_text_handle_realize (GtkWidget *widget)
{
GtkTextHandle *handle = GTK_TEXT_HANDLE (widget);
GdkSurface *parent_surface;
GtkWidget *parent;
parent = gtk_widget_get_parent (widget);
parent_surface = gtk_native_get_surface (gtk_widget_get_native (parent));
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handle->surface = gdk_surface_new_popup (parent_surface, FALSE);
gdk_surface_set_widget (handle->surface, widget);
gdk_surface_set_input_region (handle->surface, cairo_region_create ());
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g_signal_connect_swapped (handle->surface, "notify::mapped",
G_CALLBACK (surface_mapped_changed), widget);
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g_signal_connect (handle->surface, "render", G_CALLBACK (surface_render), widget);
GTK_WIDGET_CLASS (gtk_text_handle_parent_class)->realize (widget);
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handle->renderer = gsk_renderer_new_for_surface (handle->surface);
gtk_native_realize (GTK_NATIVE (handle));
}
static void
gtk_text_handle_unrealize (GtkWidget *widget)
{
GtkTextHandle *handle = GTK_TEXT_HANDLE (widget);
gtk_native_unrealize (GTK_NATIVE (handle));
GTK_WIDGET_CLASS (gtk_text_handle_parent_class)->unrealize (widget);
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gsk_renderer_unrealize (handle->renderer);
g_clear_object (&handle->renderer);
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g_signal_handlers_disconnect_by_func (handle->surface, surface_render, widget);
g_signal_handlers_disconnect_by_func (handle->surface, surface_mapped_changed, widget);
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gdk_surface_set_widget (handle->surface, NULL);
gdk_surface_destroy (handle->surface);
g_clear_object (&handle->surface);
}
static void
text_handle_set_up_gesture (GtkTextHandle *handle)
{
GtkNative *native;
/* The drag gesture is hooked on the parent native */
native = gtk_widget_get_native (gtk_widget_get_parent (GTK_WIDGET (handle)));
handle->controller_widget = GTK_WIDGET (native);
handle->controller = GTK_EVENT_CONTROLLER (gtk_gesture_drag_new ());
gtk_event_controller_set_propagation_phase (handle->controller,
GTK_PHASE_CAPTURE);
g_signal_connect (handle->controller, "drag-begin",
G_CALLBACK (handle_drag_begin), handle);
g_signal_connect (handle->controller, "drag-update",
G_CALLBACK (handle_drag_update), handle);
g_signal_connect (handle->controller, "drag-end",
G_CALLBACK (handle_drag_end), handle);
gtk_widget_add_controller (handle->controller_widget, handle->controller);
}
static void
gtk_text_handle_map (GtkWidget *widget)
{
GtkTextHandle *handle = GTK_TEXT_HANDLE (widget);
GTK_WIDGET_CLASS (gtk_text_handle_parent_class)->map (widget);
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if (handle->has_point)
{
gtk_text_handle_present_surface (handle);
text_handle_set_up_gesture (handle);
}
}
static void
gtk_text_handle_unmap (GtkWidget *widget)
{
GtkTextHandle *handle = GTK_TEXT_HANDLE (widget);
GTK_WIDGET_CLASS (gtk_text_handle_parent_class)->unmap (widget);
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gdk_surface_hide (handle->surface);
if (handle->controller_widget)
{
gtk_widget_remove_controller (handle->controller_widget,
handle->controller);
handle->controller_widget = NULL;
handle->controller = NULL;
}
}
static void
gtk_text_handle_dispose (GObject *object)
{
GtkTextHandle *handle = GTK_TEXT_HANDLE (object);
g_clear_pointer (&handle->contents, gtk_widget_unparent);
G_OBJECT_CLASS (gtk_text_handle_parent_class)->dispose (object);
}
static void
gtk_text_handle_class_init (GtkTextHandleClass *klass)
{
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->dispose = gtk_text_handle_dispose;
widget_class->snapshot = gtk_text_handle_snapshot;
widget_class->realize = gtk_text_handle_realize;
widget_class->unrealize = gtk_text_handle_unrealize;
widget_class->map = gtk_text_handle_map;
widget_class->unmap = gtk_text_handle_unmap;
signals[HANDLE_DRAGGED] =
g_signal_new (I_("handle-dragged"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST, 0,
NULL, NULL,
_gtk_marshal_VOID__INT_INT,
G_TYPE_NONE, 2,
G_TYPE_INT, G_TYPE_INT);
signals[DRAG_STARTED] =
g_signal_new (I_("drag-started"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST, 0,
NULL, NULL,
NULL,
G_TYPE_NONE, 0, G_TYPE_NONE);
signals[DRAG_FINISHED] =
g_signal_new (I_("drag-finished"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST, 0,
NULL, NULL,
NULL,
G_TYPE_NONE, 0, G_TYPE_NONE);
gtk_widget_class_set_css_name (widget_class, I_("cursor-handle"));
gtk_widget_class_set_layout_manager_type (widget_class, GTK_TYPE_BIN_LAYOUT);
}
/* Relative to pointing_to x/y */
static void
handle_get_input_extents (GtkTextHandle *handle,
GtkBorder *border)
{
GtkWidget *widget = GTK_WIDGET (handle);
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if (handle->role == GTK_TEXT_HANDLE_ROLE_CURSOR)
{
border->left = (-gtk_widget_get_width (widget) / 2) - handle->border.left;
border->right = (gtk_widget_get_width (widget) / 2) + handle->border.right;
}
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else if ((handle->role == GTK_TEXT_HANDLE_ROLE_SELECTION_END &&
gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL) ||
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(handle->role == GTK_TEXT_HANDLE_ROLE_SELECTION_START &&
gtk_widget_get_direction (widget) != GTK_TEXT_DIR_RTL))
{
border->left = -gtk_widget_get_width (widget) - handle->border.left;
border->right = handle->border.right;
}
else
{
border->left = -handle->border.left;
border->right = gtk_widget_get_width (widget) + handle->border.right;
}
border->top = - handle->border.top;
border->bottom = gtk_widget_get_height (widget) + handle->border.bottom;
}
static void
handle_drag_begin (GtkGestureDrag *gesture,
double x,
double y,
GtkTextHandle *handle)
{
GtkBorder input_extents;
double widget_x, widget_y;
x -= handle->pointing_to.x;
y -= handle->pointing_to.y;
/* Figure out if the coordinates fall into the handle input area, coordinates
* are relative to the parent widget.
*/
handle_get_input_extents (handle, &input_extents);
gtk_widget_translate_coordinates (handle->controller_widget,
gtk_widget_get_parent (GTK_WIDGET (handle)),
x, y, &widget_x, &widget_y);
if (widget_x < input_extents.left || widget_x >= input_extents.right ||
widget_y < input_extents.top || widget_y >= input_extents.bottom)
{
gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_DENIED);
return;
}
gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_CLAIMED);
/* Store untranslated coordinates here, so ::update does not need
* an extra translation
*/
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handle->dx = x;
handle->dy = y;
handle->dragged = TRUE;
g_signal_emit (handle, signals[DRAG_STARTED], 0);
}
static void
handle_drag_update (GtkGestureDrag *gesture,
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double offset_x,
double offset_y,
GtkWidget *widget)
{
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GtkTextHandle *handle = GTK_TEXT_HANDLE (widget);
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double start_x, start_y;
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int x, y;
gtk_gesture_drag_get_start_point (gesture, &start_x, &start_y);
x = start_x + offset_x - handle->dx;
y = start_y + offset_y - handle->dy + (handle->pointing_to.height / 2);
g_signal_emit (widget, signals[HANDLE_DRAGGED], 0, x, y);
}
static void
handle_drag_end (GtkGestureDrag *gesture,
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double offset_x,
double offset_y,
GtkTextHandle *handle)
{
GdkEventSequence *sequence;
GtkEventSequenceState state;
sequence = gtk_gesture_single_get_current_sequence (GTK_GESTURE_SINGLE (gesture));
state = gtk_gesture_get_sequence_state (GTK_GESTURE (gesture), sequence);
if (state == GTK_EVENT_SEQUENCE_CLAIMED)
g_signal_emit (handle, signals[DRAG_FINISHED], 0);
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handle->dragged = FALSE;
}
static void
gtk_text_handle_update_for_role (GtkTextHandle *handle)
{
GtkWidget *widget = GTK_WIDGET (handle);
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if (handle->role == GTK_TEXT_HANDLE_ROLE_CURSOR)
{
gtk_widget_remove_css_class (widget, "top");
gtk_widget_add_css_class (widget, "bottom");
gtk_widget_add_css_class (widget, "insertion-cursor");
}
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else if (handle->role == GTK_TEXT_HANDLE_ROLE_SELECTION_END)
{
gtk_widget_remove_css_class (widget, "top");
gtk_widget_add_css_class (widget, "bottom");
gtk_widget_remove_css_class (widget, "insertion-cursor");
}
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else if (handle->role == GTK_TEXT_HANDLE_ROLE_SELECTION_START)
{
gtk_widget_add_css_class (widget, "top");
gtk_widget_remove_css_class (widget, "bottom");
gtk_widget_remove_css_class (widget, "insertion-cursor");
}
gtk_widget_queue_draw (widget);
}
static void
gtk_text_handle_init (GtkTextHandle *handle)
{
handle->contents = gtk_gizmo_new ("contents", NULL, NULL, NULL, NULL, NULL, NULL);
gtk_widget_set_can_target (handle->contents, FALSE);
gtk_widget_set_parent (handle->contents, GTK_WIDGET (handle));
gtk_text_handle_update_for_role (handle);
}
GtkTextHandle *
gtk_text_handle_new (GtkWidget *parent)
{
GtkTextHandle *handle;
handle = g_object_new (GTK_TYPE_TEXT_HANDLE, NULL);
gtk_widget_set_parent (GTK_WIDGET (handle), parent);
return handle;
}
void
gtk_text_handle_set_role (GtkTextHandle *handle,
GtkTextHandleRole role)
{
g_return_if_fail (GTK_IS_TEXT_HANDLE (handle));
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if (handle->role == role)
return;
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handle->role = role;
gtk_text_handle_update_for_role (handle);
if (gtk_widget_get_visible (GTK_WIDGET (handle)))
{
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if (handle->has_point)
gtk_text_handle_present_surface (handle);
}
}
GtkTextHandleRole
gtk_text_handle_get_role (GtkTextHandle *handle)
{
g_return_val_if_fail (GTK_IS_TEXT_HANDLE (handle), GTK_TEXT_HANDLE_ROLE_CURSOR);
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return handle->role;
}
void
gtk_text_handle_set_position (GtkTextHandle *handle,
const GdkRectangle *rect)
{
g_return_if_fail (GTK_IS_TEXT_HANDLE (handle));
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if (handle->pointing_to.x == rect->x &&
handle->pointing_to.y == rect->y &&
handle->pointing_to.width == rect->width &&
handle->pointing_to.height == rect->height)
return;
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handle->pointing_to = *rect;
handle->has_point = TRUE;
if (gtk_widget_is_visible (GTK_WIDGET (handle)))
gtk_text_handle_present_surface (handle);
}
gboolean
gtk_text_handle_get_is_dragged (GtkTextHandle *handle)
{
g_return_val_if_fail (GTK_IS_TEXT_HANDLE (handle), FALSE);
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return handle->dragged;
}