Rename ShellThemeImage to ShellBorderImage

The current CSS3 border-image is close to a superset of what we were
doing for -hippo-background-image. Woot! rename ShellThemeImage to
ShellBorderImage and change parsing to look for:

 border-image: <url> <number>...

Rather than

 -shell-background-image: <url> <length>...

percentanges for the border sizes are not currently supported, neither
are the keywords for handling of the middle part. We always do 'stretch'
for now.

data/theme/gnome-shell.css

@@ -31,32 +31,32 @@ NbtkScrollView
 
 NbtkButton#up-stepper
 {
-  -shell-background-image: url("scroll-button-up.png") 5px;
+  border-image: url("scroll-button-up.png") 5;
 }
 
 NbtkButton#up-stepper:hover,
 NbtkButton#up-stepper:active
 {
-  -shell-background-image: url("scroll-button-up-hover.png") 5px;
+  border-image: url("scroll-button-up-hover.png") 5;
 }
 
 NbtkButton#down-stepper
 {
-  -shell-background-image: url("scroll-button-down.png") 5px;
+  border-image: url("scroll-button-down.png") 5;
 }
 
 NbtkButton#down-stepper:hover,
 NbtkButton#down-stepper:active
 {
-  -shell-background-image: url("scroll-button-down-hover.png") 5px;
+  border-image: url("scroll-button-down-hover.png") 5;
 }
 
 NbtkScrollBar NbtkButton#vhandle
 {
-  -shell-background-image: url("scroll-vhandle.png") 5px;
+  border-image: url("scroll-vhandle.png") 5;
 }
 
 NbtkScrollBar NbtkButton#vhandle:hover
 {
-  -shell-background-image: url("scroll-vhandle.png") 5px;
+  border-image: url("scroll-vhandle.png") 5;
 }

src/Makefile-toolkit.am

@@ -8,12 +8,12 @@ toolkit_cflags =				\
 
 # please, keep this sorted alphabetically
 toolkit_sources =				\
+	toolkit/shell-border-image.c		\
+	toolkit/shell-border-image.h		\
 	toolkit/shell-theme.c			\
 	toolkit/shell-theme.h			\
 	toolkit/shell-theme-context.c		\
 	toolkit/shell-theme-context.h		\
-	toolkit/shell-theme-image.c		\
-	toolkit/shell-theme-image.h		\
 	toolkit/shell-theme-node.c		\
 	toolkit/shell-theme-node.h		\
 	toolkit/shell-theme-private.h

src/nbtk/nbtk-widget.c

@@ -479,7 +479,7 @@ nbtk_widget_real_style_changed (NbtkWidget *self)
 {
   NbtkWidgetPrivate *priv = NBTK_WIDGET (self)->priv;
   ShellThemeNode *theme_node;
-  ShellThemeImage *theme_image;
+  ShellBorderImage *border_image;
   NbtkTextureCache *texture_cache;
   ClutterTexture *texture;
   const char *bg_file = NULL;
@@ -576,14 +576,14 @@ nbtk_widget_real_style_changed (NbtkWidget *self)
    * and a single background image above it.
    */
 
-  theme_image = shell_theme_node_get_background_theme_image (theme_node);
+  border_image = shell_theme_node_get_border_image (theme_node);
-  if (theme_image)
+  if (border_image)
     {
       const char *filename;
       gint border_left, border_right, border_top, border_bottom;
       gint width, height;
 
-      filename = shell_theme_image_get_filename (theme_image);
+      filename = shell_border_image_get_filename (border_image);
 
       /* `border-image' takes precedence over `background-image'.
        * Firefox lets the background-image shine thru when border-image has
@@ -595,7 +595,7 @@ nbtk_widget_real_style_changed (NbtkWidget *self)
       clutter_texture_get_base_size (CLUTTER_TEXTURE (texture),
                                      &width, &height);
 
-      shell_theme_image_get_borders (theme_image,
+      shell_border_image_get_borders (border_image,
 				      &border_left, &border_right, &border_top, &border_bottom);
 
       priv->border_image = nbtk_texture_frame_new (texture,

src/toolkit/shell-border-image.c

@@ -0,0 +1,92 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+
+#include <config.h>
+
+#include "shell-border-image.h"
+
+struct _ShellBorderImage {
+  GObject parent;
+
+  char *filename;
+  int border_top;
+  int border_right;
+  int border_bottom;
+  int border_left;
+};
+
+struct _ShellBorderImageClass {
+  GObjectClass parent_class;
+
+};
+
+G_DEFINE_TYPE (ShellBorderImage, shell_border_image, G_TYPE_OBJECT)
+
+static void
+shell_border_image_finalize (GObject *object)
+{
+  ShellBorderImage *image = SHELL_BORDER_IMAGE (object);
+
+  g_free (image->filename);
+
+  G_OBJECT_CLASS (shell_border_image_parent_class)->finalize (object);
+}
+
+static void
+shell_border_image_class_init (ShellBorderImageClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+  object_class->finalize = shell_border_image_finalize;
+}
+
+static void
+shell_border_image_init (ShellBorderImage *image)
+{
+}
+
+ShellBorderImage *
+shell_border_image_new (const char *filename,
+                       int         border_top,
+                       int         border_right,
+                       int         border_bottom,
+                       int         border_left)
+{
+  ShellBorderImage *image;
+
+  image = g_object_new (SHELL_TYPE_BORDER_IMAGE, NULL);
+
+  image->filename = g_strdup (filename);
+  image->border_top = border_top;
+  image->border_right = border_right;
+  image->border_bottom = border_bottom;
+  image->border_left = border_left;
+
+  return image;
+}
+
+const char *
+shell_border_image_get_filename (ShellBorderImage *image)
+{
+  g_return_val_if_fail (SHELL_IS_BORDER_IMAGE (image), NULL);
+
+  return image->filename;
+}
+
+void
+shell_border_image_get_borders (ShellBorderImage *image,
+                                int              *border_top,
+                                int              *border_right,
+                                int              *border_bottom,
+                                int              *border_left)
+{
+  g_return_if_fail (SHELL_IS_BORDER_IMAGE (image));
+
+  if (border_top)
+    *border_top = image->border_top;
+  if (border_right)
+    *border_right = image->border_right;
+  if (border_bottom)
+    *border_bottom = image->border_bottom;
+  if (border_left)
+    *border_left = image->border_left;
+}

src/toolkit/shell-border-image.h

@@ -0,0 +1,38 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+#ifndef __SHELL_BORDER_IMAGE_H__
+#define __SHELL_BORDER_IMAGE_H__
+
+#include <glib-object.h>
+
+G_BEGIN_DECLS
+
+/* A ShellBorderImage encapsulates an image with specified unscaled borders on each edge.
+ */
+typedef struct _ShellBorderImage      ShellBorderImage;
+typedef struct _ShellBorderImageClass ShellBorderImageClass;
+
+#define SHELL_TYPE_BORDER_IMAGE             (shell_border_image_get_type ())
+#define SHELL_BORDER_IMAGE(object)          (G_TYPE_CHECK_INSTANCE_CAST ((object), SHELL_TYPE_BORDER_IMAGE, ShellBorderImage))
+#define SHELL_BORDER_IMAGE_CLASS(klass)     (G_TYPE_CHECK_CLASS_CAST ((klass), SHELL_TYPE_BORDER_IMAGE, ShellBorderImageClass))
+#define SHELL_IS_BORDER_IMAGE(object)       (G_TYPE_CHECK_INSTANCE_TYPE ((object), SHELL_TYPE_BORDER_IMAGE))
+#define SHELL_IS_BORDER_IMAGE_CLASS(klass)  (G_TYPE_CHECK_CLASS_TYPE ((klass), SHELL_TYPE_BORDER_IMAGE))
+#define SHELL_BORDER_IMAGE_GET_CLASS(obj)   (G_TYPE_INSTANCE_GET_CLASS ((obj), SHELL_TYPE_BORDER_IMAGE, ShellBorderImageClass))
+
+GType             shell_border_image_get_type          (void) G_GNUC_CONST;
+
+ShellBorderImage *shell_border_image_new (const char *filename,
+                                          int         border_top,
+                                          int         border_right,
+                                          int         border_bottom,
+                                          int         border_left);
+
+const char *shell_border_image_get_filename (ShellBorderImage *image);
+void        shell_border_image_get_borders  (ShellBorderImage *image,
+                                             int             *border_top,
+                                             int             *border_right,
+                                             int             *border_bottom,
+                                             int             *border_left);
+
+G_END_DECLS
+
+#endif /* __SHELL_BORDER_IMAGE_H__ */

src/toolkit/shell-theme-image.c

@@ -1,92 +0,0 @@
-/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
-
-#include <config.h>
-
-#include "shell-theme-image.h"
-
-struct _ShellThemeImage {
-  GObject parent;
-
-  char *filename;
-  int border_top;
-  int border_right;
-  int border_bottom;
-  int border_left;
-};
-
-struct _ShellThemeImageClass {
-  GObjectClass parent_class;
-
-};
-
-G_DEFINE_TYPE (ShellThemeImage, shell_theme_image, G_TYPE_OBJECT)
-
-static void
-shell_theme_image_finalize (GObject *object)
-{
-  ShellThemeImage *image = SHELL_THEME_IMAGE (object);
-
-  g_free (image->filename);
-
-  G_OBJECT_CLASS (shell_theme_image_parent_class)->finalize (object);
-}
-
-static void
-shell_theme_image_class_init (ShellThemeImageClass *klass)
-{
-  GObjectClass *object_class = G_OBJECT_CLASS (klass);
-
-  object_class->finalize = shell_theme_image_finalize;
-}
-
-static void
-shell_theme_image_init (ShellThemeImage *image)
-{
-}
-
-ShellThemeImage *
-shell_theme_image_new (const char *filename,
-                       int         border_top,
-                       int         border_right,
-                       int         border_bottom,
-                       int         border_left)
-{
-  ShellThemeImage *image;
-
-  image = g_object_new (SHELL_TYPE_THEME_IMAGE, NULL);
-
-  image->filename = g_strdup (filename);
-  image->border_top = border_top;
-  image->border_right = border_right;
-  image->border_bottom = border_bottom;
-  image->border_left = border_left;
-
-  return image;
-}
-
-const char *
-shell_theme_image_get_filename (ShellThemeImage *image)
-{
-  g_return_val_if_fail (SHELL_IS_THEME_IMAGE (image), NULL);
-
-  return image->filename;
-}
-
-void
-shell_theme_image_get_borders (ShellThemeImage *image,
-                               int             *border_top,
-                               int             *border_right,
-                               int             *border_bottom,
-                               int             *border_left)
-{
-  g_return_if_fail (SHELL_IS_THEME_IMAGE (image));
-
-  if (border_top)
-    *border_top = image->border_top;
-  if (border_right)
-    *border_right = image->border_right;
-  if (border_bottom)
-    *border_bottom = image->border_bottom;
-  if (border_left)
-    *border_left = image->border_left;
-}

src/toolkit/shell-theme-image.h

@@ -1,38 +0,0 @@
-/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
-#ifndef __SHELL_THEME_IMAGE_H__
-#define __SHELL_THEME_IMAGE_H__
-
-#include <glib-object.h>
-
-G_BEGIN_DECLS
-
-/* A ShellThemeImage encapsulates an image with specified unscaled borders on each edge.
- */
-typedef struct _ShellThemeImage      ShellThemeImage;
-typedef struct _ShellThemeImageClass ShellThemeImageClass;
-
-#define SHELL_TYPE_THEME_IMAGE             (shell_theme_image_get_type ())
-#define SHELL_THEME_IMAGE(object)          (G_TYPE_CHECK_INSTANCE_CAST ((object), SHELL_TYPE_THEME_IMAGE, ShellThemeImage))
-#define SHELL_THEME_IMAGE_CLASS(klass)     (G_TYPE_CHECK_CLASS_CAST ((klass), SHELL_TYPE_THEME_IMAGE, ShellThemeImageClass))
-#define SHELL_IS_THEME_IMAGE(object)       (G_TYPE_CHECK_INSTANCE_TYPE ((object), SHELL_TYPE_THEME_IMAGE))
-#define SHELL_IS_THEME_IMAGE_CLASS(klass)  (G_TYPE_CHECK_CLASS_TYPE ((klass), SHELL_TYPE_THEME_IMAGE))
-#define SHELL_THEME_IMAGE_GET_CLASS(obj)   (G_TYPE_INSTANCE_GET_CLASS ((obj), SHELL_TYPE_THEME_IMAGE, ShellThemeImageClass))
-
-GType             shell_theme_image_get_type          (void) G_GNUC_CONST;
-
-ShellThemeImage *shell_theme_image_new (const char *filename,
-                                        int         border_top,
-                                        int         border_right,
-                                        int         border_bottom,
-                                        int         border_left);
-
-const char *shell_theme_image_get_filename (ShellThemeImage *image);
-void        shell_theme_image_get_borders  (ShellThemeImage *image,
-                                            int             *border_top,
-                                            int             *border_right,
-                                            int             *border_bottom,
-                                            int             *border_left);
-
-G_END_DECLS
-
-#endif /* __SHELL_THEME_IMAGE_H__ */

src/toolkit/shell-theme-node.c

@@ -39,7 +39,7 @@ struct _ShellThemeNode {
   guint padding[4];
 
   char *background_image;
-  ShellThemeImage *background_theme_image;
+  ShellBorderImage *border_image;
 
   GType element_type;
   char *element_id;
@@ -58,7 +58,7 @@ struct _ShellThemeNode {
   guint borders_computed : 1;
   guint background_computed : 1;
   guint foreground_computed : 1;
-  guint background_theme_image_computed : 1;
+  guint border_image_computed : 1;
   guint link_type : 2;
 };
 
@@ -121,10 +121,10 @@ shell_theme_node_finalize (GObject *object)
       node->font_desc = NULL;
     }
 
-  if (node->background_theme_image)
+  if (node->border_image)
     {
-      g_object_unref (node->background_theme_image);
+      g_object_unref (node->border_image);
-      node->background_theme_image = NULL;
+      node->border_image = NULL;
     }
 
   if (node->background_image)
@@ -1811,24 +1811,24 @@ shell_theme_node_get_font (ShellThemeNode *node)
 }
 
 /**
- * shell_theme_node_get_background_theme_image:
+ * shell_theme_node_get_border_image:
  * @node: a #ShellThemeNode
  *
- * Gets the value for the -shell-background-image style property
+ * Gets the value for the border-image style property
  *
- * Return value: (transfer none): the background image, or %NULL
+ * Return value: (transfer none): the border image, or %NULL
- *   if there is no background theme image.
+ *   if there is no border image.
  */
-ShellThemeImage *
+ShellBorderImage *
-shell_theme_node_get_background_theme_image (ShellThemeNode *node)
+shell_theme_node_get_border_image (ShellThemeNode *node)
 {
   int i;
 
-  if (node->background_theme_image_computed)
+  if (node->border_image_computed)
-    return node->background_theme_image;
+    return node->border_image;
 
-  node->background_theme_image = NULL;
+  node->border_image = NULL;
-  node->background_theme_image_computed = TRUE;
+  node->border_image_computed = TRUE;
 
   ensure_properties (node);
 
@@ -1836,11 +1836,11 @@ shell_theme_node_get_background_theme_image (ShellThemeNode *node)
     {
       CRDeclaration *decl = node->properties[i];
 
-      if (strcmp (decl->property->stryng->str, "-shell-background-image") == 0)
+      if (strcmp (decl->property->stryng->str, "border-image") == 0)
         {
           CRTerm *term = decl->value;
-          int lengths[4];
+          int borders[4];
-          int n_lengths = 0;
+          int n_borders = 0;
           int i;
 
           const char *url;
@@ -1859,46 +1859,57 @@ shell_theme_node_get_background_theme_image (ShellThemeNode *node)
 
           term = term->next;
 
-          /* Followed by 0 to 4 lengths */
+          /* Followed by 0 to 4 numbers or percentages. *Not lengths*. The interpretation
+           * of a number is supposed to be pixels if the image is pixel based, otherwise CSS pixels.
+           */
           for (i = 0; i < 4; i++)
             {
-              double value;
-
               if (term == NULL)
                 break;
 
-              if (get_length_from_term (node, term, FALSE, &value) != VALUE_FOUND)
+              if (term->type != TERM_NUMBER)
                 goto next_property;
 
-              lengths[n_lengths] = (int)(0.5 + value);
+              if (term->content.num->type == NUM_GENERIC)
-              n_lengths++;
+                {
+                  borders[n_borders] = round (0.5 + term->content.num->val);
+                  n_borders++;
+                }
+              else if (term->content.num->type == NUM_PERCENTAGE)
+                {
+                  /* This would be easiest to support if we moved image handling into ShellBorderImage */
+                  g_warning ("Percentages not supported for border-image");
+                  goto next_property;
+                }
+              else
+                goto next_property;
 
               term = term->next;
             }
 
-          switch (n_lengths)
+          switch (n_borders)
             {
             case 0:
               border_top = border_right = border_bottom = border_left = 0;
               break;
             case 1:
-              border_top = border_right = border_bottom = border_left = lengths[0];
+              border_top = border_right = border_bottom = border_left = borders[0];
               break;
             case 2:
-              border_top = border_bottom = lengths[0];
+              border_top = border_bottom = borders[0];
-              border_left = border_right = lengths[1];
+              border_left = border_right = borders[1];
               break;
             case 3:
-              border_top = lengths[0];
+              border_top = borders[0];
-              border_left = border_right = lengths[1];
+              border_left = border_right = borders[1];
-              border_bottom = lengths[2];
+              border_bottom = borders[2];
               break;
             case 4:
             default:
-              border_top = lengths[0];
+              border_top = borders[0];
-              border_right = lengths[1];
+              border_right = borders[1];
-              border_bottom = lengths[2];
+              border_bottom = borders[2];
-              border_left = lengths[3];
+              border_left = borders[3];
               break;
             }
 
@@ -1906,12 +1917,12 @@ shell_theme_node_get_background_theme_image (ShellThemeNode *node)
           if (filename == NULL)
             goto next_property;
 
-          node->background_theme_image = shell_theme_image_new (filename,
+          node->border_image = shell_border_image_new (filename,
                                                        border_top, border_right, border_bottom, border_left);
 
           g_free (filename);
 
-          return node->background_theme_image;
+          return node->border_image;
         }
 
     next_property:

src/toolkit/shell-theme-node.h

@@ -3,7 +3,7 @@
 #define __SHELL_THEME_NODE_H__
 
 #include <clutter/clutter.h>
-#include "shell-theme-image.h"
+#include "shell-border-image.h"
 
 G_BEGIN_DECLS
 
@@ -116,10 +116,7 @@ ShellTextDecoration shell_theme_node_get_text_decoration (ShellThemeNode *node);
  */
 const PangoFontDescription *shell_theme_node_get_font (ShellThemeNode *node);
 
-/* This is the getter for -shell-background-image, which is different from
+ShellBorderImage *shell_theme_node_get_border_image (ShellThemeNode *node);
- * background-image in having provisions for unscaled borders.
- */
-ShellThemeImage *shell_theme_node_get_background_theme_image (ShellThemeNode *node);
 
 /* Helpers for get_preferred_width()/get_preferred_height() ClutterActor vfuncs */
 void shell_theme_node_adjust_for_height       (ShellThemeNode  *node,

tests/testcommon/test.css

@@ -34,7 +34,7 @@ stage {
 
 .border-image {
     border: 15px;
-    -shell-background-image: url('border-image.png') 16px;
+    border-image: url('border-image.png') 16;
 }
 
 NbtkButton {