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gtk2/gtk/gtkimage.c
Matthias Clasen 7b2313a6df Avoid criticals in gtk_image_get_render_node 
These nodes can be NULL, we need to handle that.
2016-11-10 08:26:37 -05:00

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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/>.
*/
/*
* 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 <math.h>
#include <string.h>
#include <cairo-gobject.h>
#include "gtkcontainer.h"
#include "gtkcssstylepropertyprivate.h"
#include "gtkiconhelperprivate.h"
#include "gtkimageprivate.h"
#include "gtkicontheme.h"
#include "gtksizerequest.h"
#include "gtkintl.h"
#include "gtkprivate.h"
#include "gtktypebuiltins.h"
#include "gtkcssshadowsvalueprivate.h"
#include "gtkstylecontextprivate.h"
#include "gtkwidgetprivate.h"
#include "gtkcsscustomgadgetprivate.h"
#include "a11y/gtkimageaccessible.h"
/**
* SECTION:gtkimage
* @Short_description: A widget displaying an image
* @Title: GtkImage
* @See_also:#GdkPixbuf
*
* The #GtkImage widget displays an image. Various kinds of object
* can be displayed as an image; most typically, you would load a
* #GdkPixbuf ("pixel buffer") from a file, and then display that.
* There’s a convenience function to do this, gtk_image_new_from_file(),
* used as follows:
* |[<!-- language="C" -->
* GtkWidget *image;
* image = gtk_image_new_from_file ("myfile.png");
* ]|
* If the file isn’t loaded successfully, the image will contain a
* “broken image” icon similar to that used in many web browsers.
* If you want to handle errors in loading the file yourself,
* for example by displaying an error message, then load the image with
* gdk_pixbuf_new_from_file(), then create the #GtkImage with
* gtk_image_new_from_pixbuf().
*
* The image file may contain an animation, if so the #GtkImage will
* display an animation (#GdkPixbufAnimation) instead of a static image.
*
* #GtkImage is a “no window” widget (has no #GdkWindow of its own),
* so by default does not receive events. If you want to receive events
* on the image, such as button clicks, place the image inside a
* #GtkEventBox, then connect to the event signals on the event box.
*
* ## Handling button press events on a #GtkImage.
*
* |[<!-- language="C" -->
* static gboolean
* button_press_callback (GtkWidget *event_box,
* GdkEventButton *event,
* gpointer data)
* {
* g_print ("Event box clicked at coordinates %f,%f\n",
* event->x, event->y);
*
* // Returning TRUE means we handled the event, so the signal
* // emission should be stopped (don’t call any further callbacks
* // that may be connected). Return FALSE to continue invoking callbacks.
* return TRUE;
* }
*
* static GtkWidget*
* create_image (void)
* {
* GtkWidget *image;
* GtkWidget *event_box;
*
* image = gtk_image_new_from_file ("myfile.png");
*
* event_box = gtk_event_box_new ();
*
* gtk_container_add (GTK_CONTAINER (event_box), image);
*
* g_signal_connect (G_OBJECT (event_box),
* "button_press_event",
* G_CALLBACK (button_press_callback),
* image);
*
* return image;
* }
* ]|
*
* Sometimes an application will want to avoid depending on external data
* files, such as image files. GTK+ comes with a program to avoid this,
* called “gdk-pixbuf-csource”. This library
* allows you to convert an image into a C variable declaration, which
* can then be loaded into a #GdkPixbuf using
* gdk_pixbuf_new_from_inline().
*
* # CSS nodes
*
* GtkImage has a single CSS node with the name image.
*/
struct _GtkImagePrivate
{
GtkIconHelper *icon_helper;
GdkPixbufAnimationIter *animation_iter;
gint animation_timeout;
GtkCssGadget *gadget;
float baseline_align;
gchar *filename; /* Only used with GTK_IMAGE_ANIMATION, GTK_IMAGE_PIXBUF */
gchar *resource_path; /* Only used with GTK_IMAGE_PIXBUF */
};
#define DEFAULT_ICON_SIZE GTK_ICON_SIZE_BUTTON
static GskRenderNode *gtk_image_get_render_node (GtkWidget *widget,
GskRenderer *renderer);
static void gtk_image_size_allocate (GtkWidget *widget,
GtkAllocation*allocation);
static void gtk_image_unmap (GtkWidget *widget);
static void gtk_image_unrealize (GtkWidget *widget);
static void gtk_image_measure (GtkWidget *widget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline);
static void gtk_image_get_content_size (GtkCssGadget *gadget,
GtkOrientation orientation,
gint for_size,
gint *minimum,
gint *natural,
gint *minimum_baseline,
gint *natural_baseline,
gpointer unused);
static void gtk_image_style_updated (GtkWidget *widget);
static void gtk_image_finalize (GObject *object);
static void gtk_image_reset (GtkImage *image);
static void gtk_image_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_image_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
enum
{
PROP_0,
PROP_PIXBUF,
PROP_SURFACE,
PROP_FILE,
PROP_ICON_SIZE,
PROP_PIXEL_SIZE,
PROP_PIXBUF_ANIMATION,
PROP_ICON_NAME,
PROP_STORAGE_TYPE,
PROP_GICON,
PROP_RESOURCE,
PROP_USE_FALLBACK,
NUM_PROPERTIES
};
static GParamSpec *image_props[NUM_PROPERTIES] = { NULL, };
G_DEFINE_TYPE_WITH_PRIVATE (GtkImage, gtk_image, GTK_TYPE_WIDGET)
static void
gtk_image_class_init (GtkImageClass *class)
{
GObjectClass *gobject_class;
GtkWidgetClass *widget_class;
gobject_class = G_OBJECT_CLASS (class);
gobject_class->set_property = gtk_image_set_property;
gobject_class->get_property = gtk_image_get_property;
gobject_class->finalize = gtk_image_finalize;
widget_class = GTK_WIDGET_CLASS (class);
widget_class->get_render_node = gtk_image_get_render_node;
widget_class->measure = gtk_image_measure;
widget_class->size_allocate = gtk_image_size_allocate;
widget_class->unmap = gtk_image_unmap;
widget_class->unrealize = gtk_image_unrealize;
widget_class->style_updated = gtk_image_style_updated;
image_props[PROP_PIXBUF] =
g_param_spec_object ("pixbuf",
P_("Pixbuf"),
P_("A GdkPixbuf to display"),
GDK_TYPE_PIXBUF,
GTK_PARAM_READWRITE);
image_props[PROP_SURFACE] =
g_param_spec_boxed ("surface",
P_("Surface"),
P_("A cairo_surface_t to display"),
CAIRO_GOBJECT_TYPE_SURFACE,
GTK_PARAM_READWRITE);
image_props[PROP_FILE] =
g_param_spec_string ("file",
P_("Filename"),
P_("Filename to load and display"),
NULL,
GTK_PARAM_READWRITE);
image_props[PROP_ICON_SIZE] =
g_param_spec_int ("icon-size",
P_("Icon size"),
P_("Symbolic size to use for icon set or named icon"),
0, G_MAXINT,
DEFAULT_ICON_SIZE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkImage:pixel-size:
*
* The "pixel-size" property can be used to specify a fixed size
* overriding the #GtkImage:icon-size property for images of type
* %GTK_IMAGE_ICON_NAME.
*
* Since: 2.6
*/
image_props[PROP_PIXEL_SIZE] =
g_param_spec_int ("pixel-size",
P_("Pixel size"),
P_("Pixel size to use for named icon"),
-1, G_MAXINT,
-1,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
image_props[PROP_PIXBUF_ANIMATION] =
g_param_spec_object ("pixbuf-animation",
P_("Animation"),
P_("GdkPixbufAnimation to display"),
GDK_TYPE_PIXBUF_ANIMATION,
GTK_PARAM_READWRITE);
/**
* GtkImage:icon-name:
*
* The name of the icon in the icon theme. If the icon theme is
* changed, the image will be updated automatically.
*
* Since: 2.6
*/
image_props[PROP_ICON_NAME] =
g_param_spec_string ("icon-name",
P_("Icon Name"),
P_("The name of the icon from the icon theme"),
NULL,
GTK_PARAM_READWRITE);
/**
* GtkImage:gicon:
*
* The GIcon displayed in the GtkImage. For themed icons,
* If the icon theme is changed, the image will be updated
* automatically.
*
* Since: 2.14
*/
image_props[PROP_GICON] =
g_param_spec_object ("gicon",
P_("Icon"),
P_("The GIcon being displayed"),
G_TYPE_ICON,
GTK_PARAM_READWRITE);
/**
* GtkImage:resource:
*
* A path to a resource file to display.
*
* Since: 3.8
*/
image_props[PROP_RESOURCE] =
g_param_spec_string ("resource",
P_("Resource"),
P_("The resource path being displayed"),
NULL,
GTK_PARAM_READWRITE);
image_props[PROP_STORAGE_TYPE] =
g_param_spec_enum ("storage-type",
P_("Storage type"),
P_("The representation being used for image data"),
GTK_TYPE_IMAGE_TYPE,
GTK_IMAGE_EMPTY,
GTK_PARAM_READABLE);
/**
* GtkImage:use-fallback:
*
* Whether the icon displayed in the GtkImage will use
* standard icon names fallback. The value of this property
* is only relevant for images of type %GTK_IMAGE_ICON_NAME
* and %GTK_IMAGE_GICON.
*
* Since: 3.0
*/
image_props[PROP_USE_FALLBACK] =
g_param_spec_boolean ("use-fallback",
P_("Use Fallback"),
P_("Whether to use icon names fallback"),
FALSE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
g_object_class_install_properties (gobject_class, NUM_PROPERTIES, image_props);
gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_IMAGE_ACCESSIBLE);
gtk_widget_class_set_css_name (widget_class, "image");
}
static void
gtk_image_init (GtkImage *image)
{
GtkImagePrivate *priv;
GtkCssNode *widget_node;
image->priv = gtk_image_get_instance_private (image);
priv = image->priv;
widget_node = gtk_widget_get_css_node (GTK_WIDGET (image));
gtk_widget_set_has_window (GTK_WIDGET (image), FALSE);
priv->icon_helper = gtk_icon_helper_new (widget_node, GTK_WIDGET (image));
_gtk_icon_helper_set_icon_size (priv->icon_helper, DEFAULT_ICON_SIZE);
priv->gadget = gtk_css_custom_gadget_new_for_node (widget_node,
GTK_WIDGET (image),
gtk_image_get_content_size,
NULL,
NULL,
NULL, NULL);
}
static void
gtk_image_finalize (GObject *object)
{
GtkImage *image = GTK_IMAGE (object);
g_clear_object (&image->priv->icon_helper);
g_clear_object (&image->priv->gadget);
g_free (image->priv->filename);
g_free (image->priv->resource_path);
G_OBJECT_CLASS (gtk_image_parent_class)->finalize (object);
};
static void
gtk_image_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkImage *image = GTK_IMAGE (object);
GtkImagePrivate *priv = image->priv;
GtkIconSize icon_size = _gtk_icon_helper_get_icon_size (priv->icon_helper);
if (icon_size == GTK_ICON_SIZE_INVALID)
icon_size = DEFAULT_ICON_SIZE;
switch (prop_id)
{
case PROP_PIXBUF:
gtk_image_set_from_pixbuf (image, g_value_get_object (value));
break;
case PROP_SURFACE:
gtk_image_set_from_surface (image, g_value_get_boxed (value));
break;
case PROP_FILE:
gtk_image_set_from_file (image, g_value_get_string (value));
break;
case PROP_ICON_SIZE:
if (_gtk_icon_helper_set_icon_size (priv->icon_helper, g_value_get_int (value)))
{
g_object_notify_by_pspec (object, pspec);
gtk_widget_queue_resize (GTK_WIDGET (image));
}
break;
case PROP_PIXEL_SIZE:
gtk_image_set_pixel_size (image, g_value_get_int (value));
break;
case PROP_PIXBUF_ANIMATION:
gtk_image_set_from_animation (image, g_value_get_object (value));
break;
case PROP_ICON_NAME:
gtk_image_set_from_icon_name (image, g_value_get_string (value), icon_size);
break;
case PROP_GICON:
gtk_image_set_from_gicon (image, g_value_get_object (value), icon_size);
break;
case PROP_RESOURCE:
gtk_image_set_from_resource (image, g_value_get_string (value));
break;
case PROP_USE_FALLBACK:
if (_gtk_icon_helper_set_use_fallback (priv->icon_helper, g_value_get_boolean (value)))
g_object_notify_by_pspec (object, pspec);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_image_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkImage *image = GTK_IMAGE (object);
GtkImagePrivate *priv = image->priv;
switch (prop_id)
{
case PROP_PIXBUF:
g_value_set_object (value, _gtk_icon_helper_peek_pixbuf (priv->icon_helper));
break;
case PROP_SURFACE:
g_value_set_boxed (value, _gtk_icon_helper_peek_surface (priv->icon_helper));
break;
case PROP_FILE:
g_value_set_string (value, priv->filename);
break;
case PROP_ICON_SIZE:
g_value_set_int (value, _gtk_icon_helper_get_icon_size (priv->icon_helper));
break;
case PROP_PIXEL_SIZE:
g_value_set_int (value, _gtk_icon_helper_get_pixel_size (priv->icon_helper));
break;
case PROP_PIXBUF_ANIMATION:
g_value_set_object (value, _gtk_icon_helper_peek_animation (priv->icon_helper));
break;
case PROP_ICON_NAME:
g_value_set_string (value, _gtk_icon_helper_get_icon_name (priv->icon_helper));
break;
case PROP_GICON:
g_value_set_object (value, _gtk_icon_helper_peek_gicon (priv->icon_helper));
break;
case PROP_RESOURCE:
g_value_set_string (value, priv->resource_path);
break;
case PROP_USE_FALLBACK:
g_value_set_boolean (value, _gtk_icon_helper_get_use_fallback (priv->icon_helper));
break;
case PROP_STORAGE_TYPE:
g_value_set_enum (value, _gtk_icon_helper_get_storage_type (priv->icon_helper));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/**
* gtk_image_new_from_file:
* @filename: (type filename): a filename
*
* Creates a new #GtkImage displaying the file @filename. If the file
* isn’t found or can’t be loaded, the resulting #GtkImage will
* display a “broken image” icon. This function never returns %NULL,
* it always returns a valid #GtkImage widget.
*
* If the file contains an animation, the image will contain an
* animation.
*
* If you need to detect failures to load the file, use
* gdk_pixbuf_new_from_file() to load the file yourself, then create
* the #GtkImage from the pixbuf. (Or for animations, use
* gdk_pixbuf_animation_new_from_file()).
*
* The storage type (gtk_image_get_storage_type()) of the returned
* image is not defined, it will be whatever is appropriate for
* displaying the file.
*
* Returns: a new #GtkImage
**/
GtkWidget*
gtk_image_new_from_file (const gchar *filename)
{
GtkImage *image;
image = g_object_new (GTK_TYPE_IMAGE, NULL);
gtk_image_set_from_file (image, filename);
return GTK_WIDGET (image);
}
/**
* gtk_image_new_from_resource:
* @resource_path: a resource path
*
* Creates a new #GtkImage displaying the resource file @resource_path. If the file
* isn’t found or can’t be loaded, the resulting #GtkImage will
* display a “broken image” icon. This function never returns %NULL,
* it always returns a valid #GtkImage widget.
*
* If the file contains an animation, the image will contain an
* animation.
*
* If you need to detect failures to load the file, use
* gdk_pixbuf_new_from_file() to load the file yourself, then create
* the #GtkImage from the pixbuf. (Or for animations, use
* gdk_pixbuf_animation_new_from_file()).
*
* The storage type (gtk_image_get_storage_type()) of the returned
* image is not defined, it will be whatever is appropriate for
* displaying the file.
*
* Returns: a new #GtkImage
*
* Since: 3.4
**/
GtkWidget*
gtk_image_new_from_resource (const gchar *resource_path)
{
GtkImage *image;
image = g_object_new (GTK_TYPE_IMAGE, NULL);
gtk_image_set_from_resource (image, resource_path);
return GTK_WIDGET (image);
}
/**
* gtk_image_new_from_pixbuf:
* @pixbuf: (allow-none): a #GdkPixbuf, or %NULL
*
* Creates a new #GtkImage displaying @pixbuf.
* The #GtkImage does not assume a reference to the
* pixbuf; you still need to unref it if you own references.
* #GtkImage will add its own reference rather than adopting yours.
*
* Note that this function just creates an #GtkImage from the pixbuf. The
* #GtkImage created will not react to state changes. Should you want that,
* you should use gtk_image_new_from_icon_name().
*
* Returns: a new #GtkImage
**/
GtkWidget*
gtk_image_new_from_pixbuf (GdkPixbuf *pixbuf)
{
GtkImage *image;
image = g_object_new (GTK_TYPE_IMAGE, NULL);
gtk_image_set_from_pixbuf (image, pixbuf);
return GTK_WIDGET (image);
}
/**
* gtk_image_new_from_surface:
* @surface: (allow-none): a #cairo_surface_t, or %NULL
*
* Creates a new #GtkImage displaying @surface.
* The #GtkImage does not assume a reference to the
* surface; you still need to unref it if you own references.
* #GtkImage will add its own reference rather than adopting yours.
*
* Returns: a new #GtkImage
*
* Since: 3.10
**/
GtkWidget*
gtk_image_new_from_surface (cairo_surface_t *surface)
{
GtkImage *image;
image = g_object_new (GTK_TYPE_IMAGE, NULL);
gtk_image_set_from_surface (image, surface);
return GTK_WIDGET (image);
}
/**
* gtk_image_new_from_animation:
* @animation: an animation
*
* Creates a #GtkImage displaying the given animation.
* The #GtkImage does not assume a reference to the
* animation; you still need to unref it if you own references.
* #GtkImage will add its own reference rather than adopting yours.
*
* Note that the animation frames are shown using a timeout with
* #G_PRIORITY_DEFAULT. When using animations to indicate busyness,
* keep in mind that the animation will only be shown if the main loop
* is not busy with something that has a higher priority.
*
* Returns: a new #GtkImage widget
**/
GtkWidget*
gtk_image_new_from_animation (GdkPixbufAnimation *animation)
{
GtkImage *image;
g_return_val_if_fail (GDK_IS_PIXBUF_ANIMATION (animation), NULL);
image = g_object_new (GTK_TYPE_IMAGE, NULL);
gtk_image_set_from_animation (image, animation);
return GTK_WIDGET (image);
}
/**
* gtk_image_new_from_icon_name:
* @icon_name: an icon name
* @size: (type int): a stock icon size (#GtkIconSize)
*
* Creates a #GtkImage displaying an icon from the current icon theme.
* If the icon name isn’t known, a “broken image” icon will be
* displayed instead. If the current icon theme is changed, the icon
* will be updated appropriately.
*
* Returns: a new #GtkImage displaying the themed icon
*
* Since: 2.6
**/
GtkWidget*
gtk_image_new_from_icon_name (const gchar *icon_name,
GtkIconSize size)
{
GtkImage *image;
image = g_object_new (GTK_TYPE_IMAGE, NULL);
gtk_image_set_from_icon_name (image, icon_name, size);
return GTK_WIDGET (image);
}
/**
* gtk_image_new_from_gicon:
* @icon: an icon
* @size: (type int): a stock icon size (#GtkIconSize)
*
* Creates a #GtkImage displaying an icon from the current icon theme.
* If the icon name isn’t known, a “broken image” icon will be
* displayed instead. If the current icon theme is changed, the icon
* will be updated appropriately.
*
* Returns: a new #GtkImage displaying the themed icon
*
* Since: 2.14
**/
GtkWidget*
gtk_image_new_from_gicon (GIcon *icon,
GtkIconSize size)
{
GtkImage *image;
image = g_object_new (GTK_TYPE_IMAGE, NULL);
gtk_image_set_from_gicon (image, icon, size);
return GTK_WIDGET (image);
}
typedef struct {
GtkImage *image;
gint scale_factor;
} LoaderData;
static void
on_loader_size_prepared (GdkPixbufLoader *loader,
gint width,
gint height,
gpointer user_data)
{
LoaderData *loader_data = user_data;
gint scale_factor;
GdkPixbufFormat *format;
/* Let the regular icon helper code path handle non-scalable images */
format = gdk_pixbuf_loader_get_format (loader);
if (!gdk_pixbuf_format_is_scalable (format))
{
loader_data->scale_factor = 1;
return;
}
scale_factor = gtk_widget_get_scale_factor (GTK_WIDGET (loader_data->image));
gdk_pixbuf_loader_set_size (loader, width * scale_factor, height * scale_factor);
loader_data->scale_factor = scale_factor;
}
static GdkPixbufAnimation *
load_scalable_with_loader (GtkImage *image,
const gchar *file_path,
const gchar *resource_path,
gint *scale_factor_out)
{
GdkPixbufLoader *loader;
GBytes *bytes;
char *contents;
gsize length;
gboolean res;
GdkPixbufAnimation *animation;
LoaderData loader_data;
animation = NULL;
bytes = NULL;
loader = gdk_pixbuf_loader_new ();
loader_data.image = image;
g_signal_connect (loader, "size-prepared", G_CALLBACK (on_loader_size_prepared), &loader_data);
if (resource_path != NULL)
{
bytes = g_resources_lookup_data (resource_path, G_RESOURCE_LOOKUP_FLAGS_NONE, NULL);
}
else if (file_path != NULL)
{
res = g_file_get_contents (file_path, &contents, &length, NULL);
if (res)
bytes = g_bytes_new_take (contents, length);
}
else
{
g_assert_not_reached ();
}
if (!bytes)
goto out;
if (!gdk_pixbuf_loader_write_bytes (loader, bytes, NULL))
goto out;
if (!gdk_pixbuf_loader_close (loader, NULL))
goto out;
animation = gdk_pixbuf_loader_get_animation (loader);
if (animation != NULL)
{
g_object_ref (animation);
if (scale_factor_out != NULL)
*scale_factor_out = loader_data.scale_factor;
}
out:
gdk_pixbuf_loader_close (loader, NULL);
g_object_unref (loader);
g_bytes_unref (bytes);
return animation;
}
/**
* gtk_image_set_from_file:
* @image: a #GtkImage
* @filename: (type filename) (allow-none): a filename or %NULL
*
* See gtk_image_new_from_file() for details.
**/
void
gtk_image_set_from_file (GtkImage *image,
const gchar *filename)
{
GtkImagePrivate *priv;
GdkPixbufAnimation *anim;
gint scale_factor;
g_return_if_fail (GTK_IS_IMAGE (image));
priv = image->priv;
g_object_freeze_notify (G_OBJECT (image));
gtk_image_clear (image);
if (filename == NULL)
{
priv->filename = NULL;
g_object_thaw_notify (G_OBJECT (image));
return;
}
anim = load_scalable_with_loader (image, filename, NULL, &scale_factor);
if (anim == NULL)
{
gtk_image_set_from_icon_name (image,
"image-missing",
DEFAULT_ICON_SIZE);
g_object_thaw_notify (G_OBJECT (image));
return;
}
/* We could just unconditionally set_from_animation,
* but it's nicer for memory if we toss the animation
* if it's just a single pixbuf
*/
if (gdk_pixbuf_animation_is_static_image (anim))
gtk_image_set_from_pixbuf (image,
gdk_pixbuf_animation_get_static_image (anim));
else
gtk_image_set_from_animation (image, anim);
_gtk_icon_helper_set_pixbuf_scale (priv->icon_helper, scale_factor);
g_object_unref (anim);
priv->filename = g_strdup (filename);
g_object_thaw_notify (G_OBJECT (image));
}
/**
* gtk_image_set_from_resource:
* @image: a #GtkImage
* @resource_path: (allow-none): a resource path or %NULL
*
* See gtk_image_new_from_resource() for details.
**/
void
gtk_image_set_from_resource (GtkImage *image,
const gchar *resource_path)
{
GtkImagePrivate *priv;
GdkPixbufAnimation *animation;
gint scale_factor;
g_return_if_fail (GTK_IS_IMAGE (image));
priv = image->priv;
g_object_freeze_notify (G_OBJECT (image));
gtk_image_clear (image);
if (resource_path == NULL)
{
g_object_thaw_notify (G_OBJECT (image));
return;
}
animation = load_scalable_with_loader (image, NULL, resource_path, &scale_factor);
if (animation == NULL)
{
gtk_image_set_from_icon_name (image,
"image-missing",
DEFAULT_ICON_SIZE);
g_object_thaw_notify (G_OBJECT (image));
return;
}
if (gdk_pixbuf_animation_is_static_image (animation))
gtk_image_set_from_pixbuf (image, gdk_pixbuf_animation_get_static_image (animation));
else
gtk_image_set_from_animation (image, animation);
_gtk_icon_helper_set_pixbuf_scale (priv->icon_helper, scale_factor);
priv->resource_path = g_strdup (resource_path);
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_RESOURCE]);
g_object_unref (animation);
g_object_thaw_notify (G_OBJECT (image));
}
/**
* gtk_image_set_from_pixbuf:
* @image: a #GtkImage
* @pixbuf: (allow-none): a #GdkPixbuf or %NULL
*
* See gtk_image_new_from_pixbuf() for details.
**/
void
gtk_image_set_from_pixbuf (GtkImage *image,
GdkPixbuf *pixbuf)
{
GtkImagePrivate *priv;
g_return_if_fail (GTK_IS_IMAGE (image));
g_return_if_fail (pixbuf == NULL ||
GDK_IS_PIXBUF (pixbuf));
priv = image->priv;
g_object_freeze_notify (G_OBJECT (image));
gtk_image_clear (image);
if (pixbuf != NULL)
_gtk_icon_helper_set_pixbuf (priv->icon_helper, pixbuf);
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_PIXBUF]);
g_object_thaw_notify (G_OBJECT (image));
}
/**
* gtk_image_set_from_animation:
* @image: a #GtkImage
* @animation: the #GdkPixbufAnimation
*
* Causes the #GtkImage to display the given animation (or display
* nothing, if you set the animation to %NULL).
**/
void
gtk_image_set_from_animation (GtkImage *image,
GdkPixbufAnimation *animation)
{
GtkImagePrivate *priv;
g_return_if_fail (GTK_IS_IMAGE (image));
g_return_if_fail (animation == NULL ||
GDK_IS_PIXBUF_ANIMATION (animation));
priv = image->priv;
g_object_freeze_notify (G_OBJECT (image));
if (animation)
g_object_ref (animation);
gtk_image_clear (image);
if (animation != NULL)
{
_gtk_icon_helper_set_animation (priv->icon_helper, animation);
g_object_unref (animation);
}
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_PIXBUF_ANIMATION]);
g_object_thaw_notify (G_OBJECT (image));
}
/**
* gtk_image_set_from_icon_name:
* @image: a #GtkImage
* @icon_name: an icon name
* @size: (type int): an icon size (#GtkIconSize)
*
* See gtk_image_new_from_icon_name() for details.
*
* Since: 2.6
**/
void
gtk_image_set_from_icon_name (GtkImage *image,
const gchar *icon_name,
GtkIconSize size)
{
GtkImagePrivate *priv;
g_return_if_fail (GTK_IS_IMAGE (image));
priv = image->priv;
g_object_freeze_notify (G_OBJECT (image));
gtk_image_clear (image);
if (icon_name)
_gtk_icon_helper_set_icon_name (priv->icon_helper, icon_name, size);
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_ICON_NAME]);
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_ICON_SIZE]);
g_object_thaw_notify (G_OBJECT (image));
}
/**
* gtk_image_set_from_gicon:
* @image: a #GtkImage
* @icon: an icon
* @size: (type int): an icon size (#GtkIconSize)
*
* See gtk_image_new_from_gicon() for details.
*
* Since: 2.14
**/
void
gtk_image_set_from_gicon (GtkImage *image,
GIcon *icon,
GtkIconSize size)
{
GtkImagePrivate *priv;
g_return_if_fail (GTK_IS_IMAGE (image));
priv = image->priv;
g_object_freeze_notify (G_OBJECT (image));
if (icon)
g_object_ref (icon);
gtk_image_clear (image);
if (icon)
{
_gtk_icon_helper_set_gicon (priv->icon_helper, icon, size);
g_object_unref (icon);
}
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_GICON]);
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_ICON_SIZE]);
g_object_thaw_notify (G_OBJECT (image));
}
/**
* gtk_image_set_from_surface:
* @image: a #GtkImage
* @surface: a cairo_surface_t
*
* See gtk_image_new_from_surface() for details.
*
* Since: 3.10
**/
void
gtk_image_set_from_surface (GtkImage *image,
cairo_surface_t *surface)
{
GtkImagePrivate *priv;
g_return_if_fail (GTK_IS_IMAGE (image));
priv = image->priv;
g_object_freeze_notify (G_OBJECT (image));
if (surface)
cairo_surface_reference (surface);
gtk_image_clear (image);
if (surface)
{
_gtk_icon_helper_set_surface (priv->icon_helper, surface);
cairo_surface_destroy (surface);
}
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_SURFACE]);
g_object_thaw_notify (G_OBJECT (image));
}
/**
* gtk_image_get_storage_type:
* @image: a #GtkImage
*
* Gets the type of representation being used by the #GtkImage
* to store image data. If the #GtkImage has no image data,
* the return value will be %GTK_IMAGE_EMPTY.
*
* Returns: image representation being used
**/
GtkImageType
gtk_image_get_storage_type (GtkImage *image)
{
g_return_val_if_fail (GTK_IS_IMAGE (image), GTK_IMAGE_EMPTY);
return _gtk_icon_helper_get_storage_type (image->priv->icon_helper);
}
/**
* gtk_image_get_pixbuf:
* @image: a #GtkImage
*
* Gets the #GdkPixbuf being displayed by the #GtkImage.
* The storage type of the image must be %GTK_IMAGE_EMPTY or
* %GTK_IMAGE_PIXBUF (see gtk_image_get_storage_type()).
* The caller of this function does not own a reference to the
* returned pixbuf.
*
* Returns: (nullable) (transfer none): the displayed pixbuf, or %NULL if
* the image is empty
**/
GdkPixbuf*
gtk_image_get_pixbuf (GtkImage *image)
{
g_return_val_if_fail (GTK_IS_IMAGE (image), NULL);
return _gtk_icon_helper_peek_pixbuf (image->priv->icon_helper);
}
/**
* gtk_image_get_animation:
* @image: a #GtkImage
*
* Gets the #GdkPixbufAnimation being displayed by the #GtkImage.
* The storage type of the image must be %GTK_IMAGE_EMPTY or
* %GTK_IMAGE_ANIMATION (see gtk_image_get_storage_type()).
* The caller of this function does not own a reference to the
* returned animation.
*
* Returns: (nullable) (transfer none): the displayed animation, or %NULL if
* the image is empty
**/
GdkPixbufAnimation*
gtk_image_get_animation (GtkImage *image)
{
GtkImagePrivate *priv;
g_return_val_if_fail (GTK_IS_IMAGE (image), NULL);
priv = image->priv;
return _gtk_icon_helper_peek_animation (priv->icon_helper);
}
/**
* gtk_image_get_icon_name:
* @image: a #GtkImage
* @icon_name: (out) (transfer none) (allow-none): place to store an
* icon name, or %NULL
* @size: (out) (allow-none) (type int): place to store an icon size
* (#GtkIconSize), or %NULL
*
* Gets the icon name and size being displayed by the #GtkImage.
* The storage type of the image must be %GTK_IMAGE_EMPTY or
* %GTK_IMAGE_ICON_NAME (see gtk_image_get_storage_type()).
* The returned string is owned by the #GtkImage and should not
* be freed.
*
* Since: 2.6
**/
void
gtk_image_get_icon_name (GtkImage *image,
const gchar **icon_name,
GtkIconSize *size)
{
GtkImagePrivate *priv;
g_return_if_fail (GTK_IS_IMAGE (image));
priv = image->priv;
if (icon_name)
*icon_name = _gtk_icon_helper_get_icon_name (priv->icon_helper);
if (size)
*size = _gtk_icon_helper_get_icon_size (priv->icon_helper);
}
/**
* gtk_image_get_gicon:
* @image: a #GtkImage
* @gicon: (out) (transfer none) (allow-none): place to store a
* #GIcon, or %NULL
* @size: (out) (allow-none) (type int): place to store an icon size
* (#GtkIconSize), or %NULL
*
* Gets the #GIcon and size being displayed by the #GtkImage.
* The storage type of the image must be %GTK_IMAGE_EMPTY or
* %GTK_IMAGE_GICON (see gtk_image_get_storage_type()).
* The caller of this function does not own a reference to the
* returned #GIcon.
*
* Since: 2.14
**/
void
gtk_image_get_gicon (GtkImage *image,
GIcon **gicon,
GtkIconSize *size)
{
GtkImagePrivate *priv;
g_return_if_fail (GTK_IS_IMAGE (image));
priv = image->priv;
if (gicon)
*gicon = _gtk_icon_helper_peek_gicon (priv->icon_helper);
if (size)
*size = _gtk_icon_helper_get_icon_size (priv->icon_helper);
}
/**
* gtk_image_new:
*
* Creates a new empty #GtkImage widget.
*
* Returns: a newly created #GtkImage widget.
**/
GtkWidget*
gtk_image_new (void)
{
return g_object_new (GTK_TYPE_IMAGE, NULL);
}
static void
gtk_image_reset_anim_iter (GtkImage *image)
{
GtkImagePrivate *priv = image->priv;
if (gtk_image_get_storage_type (image) == GTK_IMAGE_ANIMATION)
{
/* Reset the animation */
if (priv->animation_timeout)
{
g_source_remove (priv->animation_timeout);
priv->animation_timeout = 0;
}
g_clear_object (&priv->animation_iter);
}
}
static void
gtk_image_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkAllocation clip;
GdkRectangle extents;
gtk_widget_set_allocation (widget, allocation);
gtk_css_gadget_allocate (GTK_IMAGE (widget)->priv->gadget,
allocation,
gtk_widget_get_allocated_baseline (widget),
&clip);
_gtk_style_context_get_icon_extents (gtk_widget_get_style_context (widget),
&extents,
allocation->x,
allocation->y,
allocation->width,
allocation->height);
gdk_rectangle_union (&clip, &extents, &clip);
gtk_widget_set_clip (widget, &clip);
}
static void
gtk_image_unmap (GtkWidget *widget)
{
gtk_image_reset_anim_iter (GTK_IMAGE (widget));
GTK_WIDGET_CLASS (gtk_image_parent_class)->unmap (widget);
}
static void
gtk_image_unrealize (GtkWidget *widget)
{
gtk_image_reset_anim_iter (GTK_IMAGE (widget));
GTK_WIDGET_CLASS (gtk_image_parent_class)->unrealize (widget);
}
static gint
animation_timeout (gpointer data)
{
GtkImage *image = GTK_IMAGE (data);
GtkImagePrivate *priv = image->priv;
int delay;
priv->animation_timeout = 0;
gdk_pixbuf_animation_iter_advance (priv->animation_iter, NULL);
delay = gdk_pixbuf_animation_iter_get_delay_time (priv->animation_iter);
if (delay >= 0)
{
GtkWidget *widget = GTK_WIDGET (image);
priv->animation_timeout =
gdk_threads_add_timeout (delay, animation_timeout, image);
g_source_set_name_by_id (priv->animation_timeout, "[gtk+] animation_timeout");
gtk_widget_queue_draw (widget);
}
return FALSE;
}
static GdkPixbuf *
get_animation_frame (GtkImage *image)
{
GtkImagePrivate *priv = image->priv;
if (priv->animation_iter == NULL)
{
int delay;
priv->animation_iter =
gdk_pixbuf_animation_get_iter (_gtk_icon_helper_peek_animation (priv->icon_helper), NULL);
delay = gdk_pixbuf_animation_iter_get_delay_time (priv->animation_iter);
if (delay >= 0) {
priv->animation_timeout =
gdk_threads_add_timeout (delay, animation_timeout, image);
g_source_set_name_by_id (priv->animation_timeout, "[gtk+] animation_timeout");
}
}
/* don't advance the anim iter here, or we could get frame changes between two
* exposes of different areas.
*/
return g_object_ref (gdk_pixbuf_animation_iter_get_pixbuf (priv->animation_iter));
}
static float
gtk_image_get_baseline_align (GtkImage *image)
{
PangoContext *pango_context;
PangoFontMetrics *metrics;
if (image->priv->baseline_align == 0.0)
{
pango_context = gtk_widget_get_pango_context (GTK_WIDGET (image));
metrics = pango_context_get_metrics (pango_context,
pango_context_get_font_description (pango_context),
pango_context_get_language (pango_context));
image->priv->baseline_align =
(float)pango_font_metrics_get_ascent (metrics) /
(pango_font_metrics_get_ascent (metrics) + pango_font_metrics_get_descent (metrics));
pango_font_metrics_unref (metrics);
}
return image->priv->baseline_align;
}
static void
gtk_image_get_content_size (GtkCssGadget *gadget,
GtkOrientation orientation,
gint for_size,
gint *minimum,
gint *natural,
gint *minimum_baseline,
gint *natural_baseline,
gpointer unused)
{
GtkWidget *widget;
gint width, height;
float baseline_align;
widget = gtk_css_gadget_get_owner (gadget);
_gtk_icon_helper_get_size (GTK_IMAGE (widget)->priv->icon_helper,
&width, &height);
if (orientation == GTK_ORIENTATION_HORIZONTAL)
{
*minimum = *natural = width;
}
else
{
baseline_align = gtk_image_get_baseline_align (GTK_IMAGE (widget));
*minimum = *natural = height;
if (minimum_baseline)
*minimum_baseline = height * baseline_align;
if (natural_baseline)
*natural_baseline = height * baseline_align;
}
}
static GskRenderNode *
gtk_image_get_render_node (GtkWidget *widget,
GskRenderer *renderer)
{
GtkImage *image = GTK_IMAGE (widget);
GtkImagePrivate *priv = image->priv;
gint w, h, baseline;
gint x, y, width, height;
GskRenderNode *res;
GskRenderNode *node;
GtkAllocation alloc, clip;
cairo_t *cr;
res = gtk_css_gadget_get_render_node (priv->gadget, renderer, FALSE);
if (res == NULL)
return NULL;
if (gtk_image_get_storage_type (image) == GTK_IMAGE_ANIMATION)
{
node = gtk_widget_create_render_node (widget, renderer, "Image Content");
gtk_widget_get_clip (widget, &clip);
_gtk_widget_get_allocation (widget, &alloc);
cr = gsk_render_node_get_draw_context (node, renderer);
cairo_translate (cr, alloc.x - clip.x, alloc.y - clip.y);
x = 0;
y = 0;
width = alloc.width;
height = alloc.height;
_gtk_icon_helper_get_size (priv->icon_helper, &w, &h);
baseline = gtk_widget_get_allocated_baseline (widget);
if (baseline == -1)
y += floor(height - h) / 2;
else
y += CLAMP (baseline - h * gtk_image_get_baseline_align (image), 0, height - h);
x += (width - w) / 2;
GtkStyleContext *context = gtk_widget_get_style_context (widget);
GdkPixbuf *pixbuf = get_animation_frame (image);
gtk_render_icon (context, cr, pixbuf, x, y);
g_object_unref (pixbuf);
cairo_destroy (cr);
}
else
{
node = gtk_icon_helper_get_render_node (priv->icon_helper, renderer);
}
if (node != NULL)
{
gsk_render_node_append_child (res, node);
gsk_render_node_unref (node);
}
return res;
}
static void
gtk_image_notify_for_storage_type (GtkImage *image,
GtkImageType storage_type)
{
switch (storage_type)
{
case GTK_IMAGE_PIXBUF:
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_PIXBUF]);
break;
case GTK_IMAGE_ANIMATION:
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_PIXBUF_ANIMATION]);
break;
case GTK_IMAGE_ICON_NAME:
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_ICON_NAME]);
break;
case GTK_IMAGE_GICON:
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_GICON]);
break;
case GTK_IMAGE_EMPTY:
default:
break;
}
}
void
gtk_image_set_from_definition (GtkImage *image,
GtkImageDefinition *def,
GtkIconSize icon_size)
{
GtkImagePrivate *priv;
g_return_if_fail (GTK_IS_IMAGE (image));
priv = image->priv;
g_object_freeze_notify (G_OBJECT (image));
gtk_image_clear (image);
if (def != NULL)
{
_gtk_icon_helper_set_definition (priv->icon_helper, def);
gtk_image_notify_for_storage_type (image, gtk_image_definition_get_storage_type (def));
}
_gtk_icon_helper_set_icon_size (priv->icon_helper, icon_size);
g_object_thaw_notify (G_OBJECT (image));
}
static void
gtk_image_reset (GtkImage *image)
{
GtkImagePrivate *priv = image->priv;
GtkImageType storage_type;
g_object_freeze_notify (G_OBJECT (image));
storage_type = gtk_image_get_storage_type (image);
if (storage_type != GTK_IMAGE_EMPTY)
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_STORAGE_TYPE]);
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_ICON_SIZE]);
gtk_image_reset_anim_iter (image);
gtk_image_notify_for_storage_type (image, storage_type);
if (priv->filename)
{
g_free (priv->filename);
priv->filename = NULL;
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_FILE]);
}
if (priv->resource_path)
{
g_free (priv->resource_path);
priv->resource_path = NULL;
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_RESOURCE]);
}
_gtk_icon_helper_clear (priv->icon_helper);
g_object_thaw_notify (G_OBJECT (image));
}
/**
* gtk_image_clear:
* @image: a #GtkImage
*
* Resets the image to be empty.
*
* Since: 2.8
*/
void
gtk_image_clear (GtkImage *image)
{
gtk_image_reset (image);
if (gtk_widget_get_visible (GTK_WIDGET (image)))
gtk_widget_queue_resize (GTK_WIDGET (image));
}
static void
gtk_image_measure (GtkWidget *widget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline)
{
gtk_css_gadget_get_preferred_size (GTK_IMAGE (widget)->priv->gadget,
orientation,
for_size,
minimum, natural,
minimum_baseline, natural_baseline);
}
static void
gtk_image_style_updated (GtkWidget *widget)
{
GtkImage *image = GTK_IMAGE (widget);
GtkImagePrivate *priv = image->priv;
GtkStyleContext *context = gtk_widget_get_style_context (widget);
GtkCssStyleChange *change = gtk_style_context_get_change (context);
gtk_icon_helper_invalidate_for_change (priv->icon_helper, change);
GTK_WIDGET_CLASS (gtk_image_parent_class)->style_updated (widget);
priv->baseline_align = 0.0;
}
/**
* gtk_image_set_pixel_size:
* @image: a #GtkImage
* @pixel_size: the new pixel size
*
* Sets the pixel size to use for named icons. If the pixel size is set
* to a value != -1, it is used instead of the icon size set by
* gtk_image_set_from_icon_name().
*
* Since: 2.6
*/
void
gtk_image_set_pixel_size (GtkImage *image,
gint pixel_size)
{
g_return_if_fail (GTK_IS_IMAGE (image));
if (_gtk_icon_helper_set_pixel_size (image->priv->icon_helper, pixel_size))
{
if (gtk_widget_get_visible (GTK_WIDGET (image)))
gtk_widget_queue_resize (GTK_WIDGET (image));
g_object_notify_by_pspec (G_OBJECT (image), image_props[PROP_PIXEL_SIZE]);
}
}
/**
* gtk_image_get_pixel_size:
* @image: a #GtkImage
*
* Gets the pixel size used for named icons.
*
* Returns: the pixel size used for named icons.
*
* Since: 2.6
*/
gint
gtk_image_get_pixel_size (GtkImage *image)
{
g_return_val_if_fail (GTK_IS_IMAGE (image), -1);
return _gtk_icon_helper_get_pixel_size (image->priv->icon_helper);
}
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