Learning_GTK4_tree/gtk/gtktextviewchild.c

497 lines
14 KiB
C

/* -*- Mode: C; c-file-style: "gnu"; tab-width: 8 -*- */
/* GTK - The GIMP Toolkit
* gtk_text_view_child.c Copyright (C) 2019 Red Hat, Inc.
*
* 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 "gtkcssnodeprivate.h"
#include "gtkprivate.h"
#include "gtktextview.h"
#include "gtktextviewchildprivate.h"
#include "gtktypebuiltins.h"
#include "gtkwidgetprivate.h"
typedef struct
{
GList link;
GtkWidget *widget;
int x;
int y;
} Overlay;
struct _GtkTextViewChild
{
GtkWidget parent_instance;
GtkTextWindowType window_type;
GQueue overlays;
int xoffset;
int yoffset;
GtkWidget *child;
};
enum {
PROP_0,
PROP_WINDOW_TYPE,
N_PROPS
};
G_DEFINE_TYPE (GtkTextViewChild, gtk_text_view_child, GTK_TYPE_WIDGET)
static GParamSpec *properties[N_PROPS];
static Overlay *
overlay_new (GtkWidget *widget,
int x,
int y)
{
Overlay *overlay;
overlay = g_new0 (Overlay, 1);
overlay->link.data = overlay;
overlay->widget = g_object_ref (widget);
overlay->x = x;
overlay->y = y;
return overlay;
}
static void
overlay_free (Overlay *overlay)
{
g_assert (overlay->link.prev == NULL);
g_assert (overlay->link.next == NULL);
g_object_unref (overlay->widget);
g_free (overlay);
}
static void
gtk_text_view_child_remove_overlay (GtkTextViewChild *self,
Overlay *overlay)
{
g_queue_unlink (&self->overlays, &overlay->link);
gtk_widget_unparent (overlay->widget);
overlay_free (overlay);
}
static Overlay *
gtk_text_view_child_get_overlay (GtkTextViewChild *self,
GtkWidget *widget)
{
GList *iter;
for (iter = self->overlays.head; iter; iter = iter->next)
{
Overlay *overlay = iter->data;
if (overlay->widget == widget)
return overlay;
}
return NULL;
}
void
gtk_text_view_child_add (GtkTextViewChild *self,
GtkWidget *widget)
{
if (self->child != NULL)
{
g_warning ("%s allows a single child and already contains a %s",
G_OBJECT_TYPE_NAME (self),
G_OBJECT_TYPE_NAME (widget));
return;
}
self->child = g_object_ref (widget);
gtk_widget_set_parent (widget, GTK_WIDGET (self));
}
void
gtk_text_view_child_remove (GtkTextViewChild *self,
GtkWidget *widget)
{
if (widget == self->child)
{
self->child = NULL;
gtk_widget_unparent (widget);
g_object_unref (widget);
}
else
{
Overlay *overlay = gtk_text_view_child_get_overlay (self, widget);
if (overlay != NULL)
gtk_text_view_child_remove_overlay (self, overlay);
}
}
static void
gtk_text_view_child_measure (GtkWidget *widget,
GtkOrientation orientation,
int for_size,
int *min_size,
int *nat_size,
int *min_baseline,
int *nat_baseline)
{
GtkTextViewChild *self = GTK_TEXT_VIEW_CHILD (widget);
const GList *iter;
int real_min_size = 0;
int real_nat_size = 0;
if (self->child != NULL)
gtk_widget_measure (self->child,
orientation,
for_size,
&real_min_size,
&real_nat_size,
NULL,
NULL);
for (iter = self->overlays.head; iter; iter = iter->next)
{
Overlay *overlay = iter->data;
int child_min_size = 0;
int child_nat_size = 0;
gtk_widget_measure (overlay->widget,
orientation,
for_size,
&child_min_size,
&child_nat_size,
NULL,
NULL);
if (child_min_size > real_min_size)
real_min_size = child_min_size;
if (child_nat_size > real_nat_size)
real_nat_size = child_nat_size;
}
if (min_size)
*min_size = real_min_size;
if (nat_size)
*nat_size = real_nat_size;
if (min_baseline)
*min_baseline = -1;
if (nat_baseline)
*nat_baseline = -1;
}
static void
gtk_text_view_child_size_allocate (GtkWidget *widget,
int width,
int height,
int baseline)
{
GtkTextViewChild *self = GTK_TEXT_VIEW_CHILD (widget);
GtkRequisition min_req;
GdkRectangle rect;
const GList *iter;
GTK_WIDGET_CLASS (gtk_text_view_child_parent_class)->size_allocate (widget, width, height, baseline);
if (self->child != NULL)
{
rect.x = 0;
rect.y = 0;
rect.width = width;
rect.height = height;
gtk_widget_size_allocate (self->child, &rect, baseline);
}
for (iter = self->overlays.head; iter; iter = iter->next)
{
Overlay *overlay = iter->data;
gtk_widget_get_preferred_size (overlay->widget, &min_req, NULL);
rect.width = min_req.width;
rect.height = min_req.height;
if (self->window_type == GTK_TEXT_WINDOW_TEXT ||
self->window_type == GTK_TEXT_WINDOW_TOP ||
self->window_type == GTK_TEXT_WINDOW_BOTTOM)
rect.x = overlay->x - self->xoffset;
else
rect.x = overlay->x;
if (self->window_type == GTK_TEXT_WINDOW_TEXT ||
self->window_type == GTK_TEXT_WINDOW_RIGHT ||
self->window_type == GTK_TEXT_WINDOW_LEFT)
rect.y = overlay->y - self->yoffset;
else
rect.y = overlay->y;
gtk_widget_size_allocate (overlay->widget, &rect, -1);
}
}
static void
gtk_text_view_child_snapshot (GtkWidget *widget,
GtkSnapshot *snapshot)
{
GtkTextViewChild *self = GTK_TEXT_VIEW_CHILD (widget);
const GList *iter;
GTK_WIDGET_CLASS (gtk_text_view_child_parent_class)->snapshot (widget, snapshot);
if (self->child)
gtk_widget_snapshot_child (widget, self->child, snapshot);
for (iter = self->overlays.head; iter; iter = iter->next)
{
Overlay *overlay = iter->data;
gtk_widget_snapshot_child (widget, overlay->widget, snapshot);
}
}
static void
gtk_text_view_child_constructed (GObject *object)
{
GtkTextViewChild *self = GTK_TEXT_VIEW_CHILD (object);
GtkCssNode *css_node;
G_OBJECT_CLASS (gtk_text_view_child_parent_class)->constructed (object);
css_node = gtk_widget_get_css_node (GTK_WIDGET (self));
switch (self->window_type)
{
case GTK_TEXT_WINDOW_LEFT:
gtk_css_node_set_name (css_node, g_quark_from_static_string ("border"));
gtk_css_node_add_class (css_node, g_quark_from_static_string ("left"));
break;
case GTK_TEXT_WINDOW_RIGHT:
gtk_css_node_set_name (css_node, g_quark_from_static_string ("border"));
gtk_css_node_add_class (css_node, g_quark_from_static_string ("right"));
break;
case GTK_TEXT_WINDOW_TOP:
gtk_css_node_set_name (css_node, g_quark_from_static_string ("border"));
gtk_css_node_add_class (css_node, g_quark_from_static_string ("top"));
break;
case GTK_TEXT_WINDOW_BOTTOM:
gtk_css_node_set_name (css_node, g_quark_from_static_string ("border"));
gtk_css_node_add_class (css_node, g_quark_from_static_string ("bottom"));
break;
case GTK_TEXT_WINDOW_TEXT:
gtk_css_node_set_name (css_node, g_quark_from_static_string ("child"));
break;
case GTK_TEXT_WINDOW_WIDGET:
default:
break;
}
}
static void
gtk_text_view_child_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkTextViewChild *self = GTK_TEXT_VIEW_CHILD (object);
switch (prop_id)
{
case PROP_WINDOW_TYPE:
g_value_set_enum (value, self->window_type);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
gtk_text_view_child_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkTextViewChild *self = GTK_TEXT_VIEW_CHILD (object);
switch (prop_id)
{
case PROP_WINDOW_TYPE:
self->window_type = g_value_get_enum (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
gtk_text_view_child_dispose (GObject *object)
{
GtkTextViewChild *self = GTK_TEXT_VIEW_CHILD (object);
GtkWidget *child;
while ((child = gtk_widget_get_first_child (GTK_WIDGET (self))))
gtk_text_view_child_remove (self, child);
G_OBJECT_CLASS (gtk_text_view_child_parent_class)->dispose (object);
}
static void
gtk_text_view_child_class_init (GtkTextViewChildClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
object_class->dispose = gtk_text_view_child_dispose;
object_class->constructed = gtk_text_view_child_constructed;
object_class->get_property = gtk_text_view_child_get_property;
object_class->set_property = gtk_text_view_child_set_property;
widget_class->measure = gtk_text_view_child_measure;
widget_class->size_allocate = gtk_text_view_child_size_allocate;
widget_class->snapshot = gtk_text_view_child_snapshot;
/**
* GtkTextViewChild:window-type:
*
* The "window-type" property is the `GtkTextWindowType` of the
* `GtkTextView` that the child is attached.
*/
properties[PROP_WINDOW_TYPE] =
g_param_spec_enum ("window-type", NULL, NULL,
GTK_TYPE_TEXT_WINDOW_TYPE,
GTK_TEXT_WINDOW_TEXT,
GTK_PARAM_READWRITE|G_PARAM_CONSTRUCT_ONLY|G_PARAM_EXPLICIT_NOTIFY);
g_object_class_install_properties (object_class, N_PROPS, properties);
}
static void
gtk_text_view_child_init (GtkTextViewChild *self)
{
self->window_type = GTK_TEXT_WINDOW_TEXT;
gtk_widget_set_overflow (GTK_WIDGET (self), GTK_OVERFLOW_HIDDEN);
}
GtkWidget *
gtk_text_view_child_new (GtkTextWindowType window_type)
{
g_return_val_if_fail (window_type == GTK_TEXT_WINDOW_LEFT ||
window_type == GTK_TEXT_WINDOW_RIGHT ||
window_type == GTK_TEXT_WINDOW_TOP ||
window_type == GTK_TEXT_WINDOW_BOTTOM ||
window_type == GTK_TEXT_WINDOW_TEXT,
NULL);
return g_object_new (GTK_TYPE_TEXT_VIEW_CHILD,
"window-type", window_type,
NULL);
}
void
gtk_text_view_child_add_overlay (GtkTextViewChild *self,
GtkWidget *widget,
int xpos,
int ypos)
{
Overlay *overlay;
g_return_if_fail (GTK_IS_TEXT_VIEW_CHILD (self));
g_return_if_fail (GTK_IS_WIDGET (widget));
overlay = overlay_new (widget, xpos, ypos);
g_queue_push_tail (&self->overlays, &overlay->link);
gtk_widget_set_parent (widget, GTK_WIDGET (self));
}
void
gtk_text_view_child_move_overlay (GtkTextViewChild *self,
GtkWidget *widget,
int xpos,
int ypos)
{
Overlay *overlay;
g_return_if_fail (GTK_IS_TEXT_VIEW_CHILD (self));
g_return_if_fail (GTK_IS_WIDGET (widget));
overlay = gtk_text_view_child_get_overlay (self, widget);
if (overlay != NULL)
{
overlay->x = xpos;
overlay->y = ypos;
if (gtk_widget_get_visible (GTK_WIDGET (self)) &&
gtk_widget_get_visible (widget))
gtk_widget_queue_allocate (GTK_WIDGET (self));
}
}
GtkTextWindowType
gtk_text_view_child_get_window_type (GtkTextViewChild *self)
{
g_return_val_if_fail (GTK_IS_TEXT_VIEW_CHILD (self), 0);
return self->window_type;
}
void
gtk_text_view_child_set_offset (GtkTextViewChild *self,
int xoffset,
int yoffset)
{
gboolean changed = FALSE;
g_return_if_fail (GTK_IS_TEXT_VIEW_CHILD (self));
if (self->window_type == GTK_TEXT_WINDOW_TEXT ||
self->window_type == GTK_TEXT_WINDOW_TOP ||
self->window_type == GTK_TEXT_WINDOW_BOTTOM)
{
if (self->xoffset != xoffset)
{
self->xoffset = xoffset;
changed = TRUE;
}
}
if (self->window_type == GTK_TEXT_WINDOW_TEXT ||
self->window_type == GTK_TEXT_WINDOW_LEFT ||
self->window_type == GTK_TEXT_WINDOW_RIGHT)
{
if (self->yoffset != yoffset)
{
self->yoffset = yoffset;
changed = TRUE;
}
}
if (changed)
gtk_widget_queue_draw (GTK_WIDGET (self));
}