[gtk+/win32-theme2: 6/18] Add initial cut at win32 theme support for CSS



commit abe6598a13ed1b86db0f315f08b27dad9172c864
Author: Alexander Larsson <alexl redhat com>
Date:   Tue Nov 15 20:52:45 2011 +0100

    Add initial cut at win32 theme support for CSS
    
    We now support -gtk-win32-theme-part(class,part,state) in background
    and border-image CSS properties. This renders the corresponding
    theme part using DrawThemeBackground() and acts as a base for a
    CSS based windows theme.
    
    Note that we build the parsing code even on non-win32 so that
    all themese will parse the same on all arches. We draw pink instead
    of the actual theme parts on non-win32 though.

 gtk/Makefile.am            |    2 +
 gtk/gtkstyleproperties.c   |    7 +-
 gtk/gtkstyleproperty.c     |   33 ++++
 gtk/gtkwin32theme.c        |  367 ++++++++++++++++++++++++++++++++++++++++++++
 gtk/gtkwin32themeprivate.h |   48 ++++++
 5 files changed, 455 insertions(+), 2 deletions(-)
---
diff --git a/gtk/Makefile.am b/gtk/Makefile.am
index dc613aa..c12b006 100644
--- a/gtk/Makefile.am
+++ b/gtk/Makefile.am
@@ -465,6 +465,7 @@ gtk_private_h_sources =		\
 	gtktreedatalist.h	\
 	gtktreeprivate.h	\
 	gtkwidgetprivate.h	\
+	gtkwin32themeprivate.h	\
 	gtkwindowprivate.h	\
 	gtktreemenu.h		\
 	$(gtk_clipboard_dnd_h_sources) \
@@ -724,6 +725,7 @@ gtk_base_c_sources = 		\
 	gtkwidget.c		\
 	gtkwidgetpath.c		\
 	gtkwindow.c		\
+	gtkwin32theme.c		\
 	$(gtk_clipboard_dnd_c_sources) \
 	$(gtk_appchooser_impl_c_sources)
 
diff --git a/gtk/gtkstyleproperties.c b/gtk/gtkstyleproperties.c
index 3182802..8b931ad 100644
--- a/gtk/gtkstyleproperties.c
+++ b/gtk/gtkstyleproperties.c
@@ -37,6 +37,8 @@
 #include "gtkstylepropertyprivate.h"
 #include "gtkintl.h"
 
+#include "gtkwin32themeprivate.h"
+
 /**
  * SECTION:gtkstyleproperties
  * @Short_description: Store for style property information
@@ -465,9 +467,10 @@ _gtk_style_properties_set_property_by_property (GtkStyleProperties     *props,
     }
   else if (style_prop->pspec->value_type == CAIRO_GOBJECT_TYPE_PATTERN)
     {
-      /* Allow GtkGradient as a substitute */
+      /* Allow GtkGradient and theme part as a substitute */
       g_return_if_fail (value_type == CAIRO_GOBJECT_TYPE_PATTERN ||
-                        value_type == GTK_TYPE_GRADIENT);
+                        value_type == GTK_TYPE_GRADIENT	||
+			value_type == GTK_TYPE_WIN32_THEME_PART);
     }
   else if (style_prop->pspec->value_type == G_TYPE_INT)
     {
diff --git a/gtk/gtkstyleproperty.c b/gtk/gtkstyleproperty.c
index 1c73d30..7c302ad 100644
--- a/gtk/gtkstyleproperty.c
+++ b/gtk/gtkstyleproperty.c
@@ -41,6 +41,7 @@
 #include "gtkshadowprivate.h"
 #include "gtkthemingengine.h"
 #include "gtktypebuiltins.h"
+#include "gtkwin32themeprivate.h"
 
 /* this is in case round() is not provided by the compiler, 
  * such as in the case of C89 compilers, like MSVC
@@ -908,6 +909,11 @@ pattern_value_parse (GtkCssParser *parser,
 {
   if (_gtk_css_parser_begins_with (parser, '-'))
     {
+      int res;
+      res = _gtk_win32_theme_part_parse (parser, base, value);
+      if (res >= 0)
+	return res > 0;
+      /* < 0 => continue */
       g_value_unset (value);
       g_value_init (value, GTK_TYPE_GRADIENT);
       return gradient_value_parse (parser, base, value);
@@ -2475,6 +2481,27 @@ resolve_color_rgb (GtkStyleProperties *props,
 }
 
 static gboolean
+resolve_win32_theme_part (GtkStyleProperties *props,
+			  GValue             *value,
+			  GValue             *value_out,
+			  GtkStylePropertyContext *context)
+{
+  GtkWin32ThemePart  *part;
+  cairo_pattern_t *pattern;
+
+  part = g_value_get_boxed (value);
+  if (part == NULL)
+    return FALSE;
+
+  pattern = _gtk_win32_theme_part_render (part, context->width, context->height);
+
+  g_value_take_boxed (value_out, pattern);
+
+  return TRUE;
+}
+
+
+static gboolean
 resolve_gradient (GtkStyleProperties *props,
                   GValue             *value)
 {
@@ -2560,6 +2587,12 @@ _gtk_style_property_resolve (const GtkStyleProperty *property,
       if (!resolve_shadow (props, val))
         _gtk_style_property_default_value (property, props, state, val);
     }
+  else if (G_VALUE_TYPE (val) == GTK_TYPE_WIN32_THEME_PART)
+    {
+      if (resolve_win32_theme_part (props, val, val_out, context))
+	return; /* Don't copy val, this sets val_out */
+      _gtk_style_property_default_value (property, props, state, val);
+    }
 
  out:
   g_value_copy (val, val_out);
diff --git a/gtk/gtkwin32theme.c b/gtk/gtkwin32theme.c
new file mode 100644
index 0000000..71f7ad2
--- /dev/null
+++ b/gtk/gtkwin32theme.c
@@ -0,0 +1,367 @@
+/* GTK - The GIMP Toolkit
+ * Copyright (C) 2010 Carlos Garnacho <carlosg gnome org>
+ * Copyright (C) 2011 Red Hat, Inc.
+ *
+ * Authors: Carlos Garnacho <carlosg gnome org>
+ *          Cosimo Cecchi <cosimoc 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, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include <config.h>
+
+#include "gtkwin32themeprivate.h"
+
+#ifdef G_OS_WIN32
+
+#include <windows.h>
+#include <cairo-win32.h>
+
+typedef HANDLE HTHEME;
+
+#define UXTHEME_DLL "uxtheme.dll"
+
+static HINSTANCE uxtheme_dll = NULL;
+static gboolean use_xp_theme = FALSE;
+
+typedef HRESULT (FAR PASCAL *GetThemeSysFontFunc)           (HTHEME hTheme, int iFontID, OUT LOGFONTW *plf);
+typedef int (FAR PASCAL *GetThemeSysSizeFunc)               (HTHEME hTheme, int iSizeId);
+typedef COLORREF (FAR PASCAL *GetThemeSysColorFunc)         (HTHEME hTheme,
+							     int iColorID);
+typedef HTHEME (FAR PASCAL *OpenThemeDataFunc)              (HWND hwnd,
+							     LPCWSTR pszClassList);
+typedef HRESULT (FAR PASCAL *CloseThemeDataFunc)            (HTHEME theme);
+typedef HRESULT (FAR PASCAL *DrawThemeBackgroundFunc)       (HTHEME hTheme, HDC hdc, int iPartId, int iStateId,
+							     const RECT *pRect, const RECT *pClipRect);
+typedef HRESULT (FAR PASCAL *EnableThemeDialogTextureFunc)  (HWND hwnd,
+							     DWORD dwFlags);
+typedef BOOL (FAR PASCAL *IsThemeActiveFunc)                (VOID);
+typedef BOOL (FAR PASCAL *IsAppThemedFunc)                  (VOID);
+typedef BOOL (FAR PASCAL *IsThemeBackgroundPartiallyTransparentFunc) (HTHEME hTheme,
+								      int iPartId,
+								      int iStateId);
+typedef HRESULT (FAR PASCAL *DrawThemeParentBackgroundFunc) (HWND hwnd,
+							     HDC hdc,
+							     RECT *prc);
+typedef HRESULT (FAR PASCAL *GetThemePartSizeFunc)          (HTHEME hTheme,
+							     HDC hdc,
+							     int iPartId,
+							     int iStateId,
+							     RECT *prc,
+							     int eSize,
+							     SIZE *psz);
+
+static GetThemeSysFontFunc get_theme_sys_font = NULL;
+static GetThemeSysColorFunc get_theme_sys_color = NULL;
+static GetThemeSysSizeFunc get_theme_sys_metric = NULL;
+static OpenThemeDataFunc open_theme_data = NULL;
+static CloseThemeDataFunc close_theme_data = NULL;
+static DrawThemeBackgroundFunc draw_theme_background = NULL;
+static EnableThemeDialogTextureFunc enable_theme_dialog_texture = NULL;
+static IsThemeActiveFunc is_theme_active = NULL;
+static IsAppThemedFunc is_app_themed = NULL;
+static IsThemeBackgroundPartiallyTransparentFunc is_theme_partially_transparent = NULL;
+static DrawThemeParentBackgroundFunc draw_theme_parent_background = NULL;
+static GetThemePartSizeFunc get_theme_part_size = NULL;
+
+static GHashTable *hthemes_by_class = NULL;
+
+static void
+_gtk_win32_theme_init (void)
+{
+  char *buf;
+  char dummy;
+  int n, k;
+
+  if (uxtheme_dll)
+    return;
+
+  n = GetSystemDirectory (&dummy, 0);
+  if (n <= 0)
+    return;
+
+  buf = g_malloc (n + 1 + strlen (UXTHEME_DLL));
+  k = GetSystemDirectory (buf, n);
+  if (k == 0 || k > n)
+    {
+      g_free (buf);
+      return;
+    }
+
+  if (!G_IS_DIR_SEPARATOR (buf[strlen (buf) -1]))
+    strcat (buf, G_DIR_SEPARATOR_S);
+  strcat (buf, UXTHEME_DLL);
+
+  uxtheme_dll = LoadLibrary (buf);
+  g_free (buf);
+
+  if (!uxtheme_dll)
+    return;
+
+  is_app_themed = (IsAppThemedFunc) GetProcAddress (uxtheme_dll, "IsAppThemed");
+  if (is_app_themed)
+    {
+      is_theme_active = (IsThemeActiveFunc) GetProcAddress (uxtheme_dll, "IsThemeActive");
+      open_theme_data = (OpenThemeDataFunc) GetProcAddress (uxtheme_dll, "OpenThemeData");
+      close_theme_data = (CloseThemeDataFunc) GetProcAddress (uxtheme_dll, "CloseThemeData");
+      draw_theme_background = (DrawThemeBackgroundFunc) GetProcAddress (uxtheme_dll, "DrawThemeBackground");
+      enable_theme_dialog_texture = (EnableThemeDialogTextureFunc) GetProcAddress (uxtheme_dll, "EnableThemeDialogTexture");
+      get_theme_sys_font = (GetThemeSysFontFunc) GetProcAddress (uxtheme_dll, "GetThemeSysFont");
+      get_theme_sys_color = (GetThemeSysColorFunc) GetProcAddress (uxtheme_dll, "GetThemeSysColor");
+      get_theme_sys_metric = (GetThemeSysSizeFunc) GetProcAddress (uxtheme_dll, "GetThemeSysSize");
+      is_theme_partially_transparent = (IsThemeBackgroundPartiallyTransparentFunc) GetProcAddress (uxtheme_dll, "IsThemeBackgroundPartiallyTransparent");
+      draw_theme_parent_background = (DrawThemeParentBackgroundFunc) GetProcAddress (uxtheme_dll, "DrawThemeParentBackground");
+      get_theme_part_size = (GetThemePartSizeFunc) GetProcAddress (uxtheme_dll, "GetThemePartSize");
+    }
+
+  if (is_app_themed && is_theme_active)
+    {
+      use_xp_theme = (is_app_themed () && is_theme_active ());
+    }
+  else
+    {
+      use_xp_theme = FALSE;
+    }
+
+  hthemes_by_class = g_hash_table_new (g_str_hash, g_str_equal);
+}
+
+static HTHEME
+lookup_htheme_by_classname (const char *class)
+{
+  HTHEME theme;
+  guint16 *wclass;
+  char *lower;
+  
+  lower = g_ascii_strdown (class, -1);
+
+  theme = (HTHEME)  g_hash_table_lookup (hthemes_by_class, lower);
+  if (theme)
+    {
+      g_free (lower);
+      return theme;
+    }
+
+  wclass = g_utf8_to_utf16 (lower, -1, NULL, NULL, NULL);
+  theme  = open_theme_data (NULL, wclass);
+  g_free (wclass);
+
+  if (theme == NULL)
+    {
+      g_free (lower);
+      return NULL;
+    }
+
+  /* Takes ownership of lower: */
+  g_hash_table_insert (hthemes_by_class, lower, theme);
+
+  return theme;
+}
+
+#else
+
+typedef void * HTHEME;
+
+static void
+_gtk_win32_theme_init (void)
+{
+}
+
+static HTHEME
+lookup_htheme_by_classname (const char *class)
+{
+  return NULL;
+}
+
+#endif /* G_OS_WIN32 */
+
+G_DEFINE_BOXED_TYPE_WITH_CODE (GtkWin32ThemePart, _gtk_win32_theme_part,
+			       _gtk_win32_theme_part_ref, _gtk_win32_theme_part_unref, 
+			       _gtk_win32_theme_init() )
+
+struct _GtkWin32ThemePart {
+  HTHEME theme;
+  int part;
+  int state;
+
+  gint ref_count;
+};
+
+GtkWin32ThemePart *
+_gtk_win32_theme_part_new (const char *class, 
+			   int xp_part, int state)
+{
+  GtkWin32ThemePart *part;
+
+  part = g_slice_new0 (GtkWin32ThemePart);
+  part->ref_count = 1;
+
+  part->theme = lookup_htheme_by_classname (class);
+  part->part = xp_part;
+  part->state = state;
+
+  return part;
+}
+
+GtkWin32ThemePart *
+_gtk_win32_theme_part_ref (GtkWin32ThemePart *part)
+{
+  g_return_val_if_fail (part != NULL, NULL);
+
+  part->ref_count++;
+
+  return part;
+}
+
+void
+_gtk_win32_theme_part_unref (GtkWin32ThemePart *part)
+{
+  g_return_if_fail (part != NULL);
+
+  part->ref_count--;
+
+  if (part->ref_count == 0)
+    {
+      g_slice_free (GtkWin32ThemePart, part);
+    }
+}
+
+int
+_gtk_win32_theme_part_parse (GtkCssParser *parser, 
+			     GFile *base, 
+			     GValue *value)
+{
+  char *class;
+  int xp_part, state;
+  GtkWin32ThemePart *theme_part;
+
+  if (!_gtk_css_parser_try (parser, "-gtk-win32-theme-part", TRUE))
+    {
+      return -1;
+    }
+  
+  g_value_unset (value);
+  g_value_init (value, GTK_TYPE_WIN32_THEME_PART);
+
+  if (!_gtk_css_parser_try (parser, "(", TRUE))
+    {
+      _gtk_css_parser_error (parser,
+                             "Expected '(' after '-gtk-win32-theme-part'");
+      return 0;
+    }
+  
+  class = _gtk_css_parser_try_name (parser, TRUE);
+  if (class == NULL)
+    {
+      _gtk_css_parser_error (parser,
+                             "Expected name as first argument to  '-gtk-win32-theme-part'");
+      return 0;
+    }
+
+  if (! _gtk_css_parser_try (parser, ",", TRUE))
+    {
+      g_free (class);
+      _gtk_css_parser_error (parser,
+			     "Expected ','");
+      return 0;
+    }
+
+  if (!_gtk_css_parser_try_int (parser, &xp_part))
+    {
+      g_free (class);
+      _gtk_css_parser_error (parser, "Expected a valid integer value");
+      return 0;
+    }
+
+  if (! _gtk_css_parser_try (parser, ",", TRUE))
+    {
+      g_free (class);
+      _gtk_css_parser_error (parser,
+			     "Expected ','");
+      return 0;
+    }
+
+  if (!_gtk_css_parser_try_int (parser, &state))
+    {
+      g_free (class);
+      _gtk_css_parser_error (parser, "Expected a valid integer value");
+      return 0;
+    }
+
+  if (!_gtk_css_parser_try (parser, ")", TRUE))
+    {
+      g_free (class);
+      _gtk_css_parser_error (parser,
+			     "Expected ')'");
+      return 0;
+    }
+  
+  theme_part = _gtk_win32_theme_part_new (class, xp_part, state);
+  g_free (class);
+  
+  g_value_take_boxed (value, theme_part);
+  return 1;
+}
+
+cairo_pattern_t *
+_gtk_win32_theme_part_render  (GtkWin32ThemePart  *part,
+			       int                 width,
+			       int                 height)
+{
+#ifdef G_OS_WIN32
+  cairo_surface_t *surface, *image;
+  cairo_pattern_t *pattern;
+  cairo_matrix_t matrix;
+  HDC hdc;
+  RECT rect;
+  HRESULT res;
+  cairo_user_data_key_t key;
+
+  surface = cairo_win32_surface_create_with_dib (CAIRO_FORMAT_ARGB32, width, height);
+  hdc = cairo_win32_surface_get_dc (surface);
+  
+  rect.left = 0;
+  rect.top = 0;
+  rect.right = width;
+  rect.bottom = height;
+
+  res = draw_theme_background (part->theme, hdc, part->part, part->state, &rect, &rect);
+
+  /* We need to return an image surface, as that is what the code expects in order
+     to get the size */
+  image = cairo_win32_surface_get_image (surface);
+  pattern = cairo_pattern_create_for_surface (cairo_surface_reference (image));
+
+  cairo_matrix_init_scale (&matrix,
+			   width,
+			   height);
+  cairo_pattern_set_matrix (pattern, &matrix);
+
+  /* We can't immediately destroy the surface, because that would free the data
+     the image surface refers too. Instead we destroy it with the pattern. */
+  cairo_pattern_set_user_data (pattern,
+			       &key,
+			       surface, (cairo_destroy_func_t) cairo_surface_destroy);
+
+  return pattern;
+#else
+  GdkRGBA color;
+  
+  gdk_rgba_parse (&color, "pink");
+
+  return cairo_pattern_create_rgb (color.red, color.green, color.blue);
+#endif
+}
diff --git a/gtk/gtkwin32themeprivate.h b/gtk/gtkwin32themeprivate.h
new file mode 100644
index 0000000..adad562
--- /dev/null
+++ b/gtk/gtkwin32themeprivate.h
@@ -0,0 +1,48 @@
+/* GTK - The GIMP Toolkit
+ * Copyright (C) 2011 Red Hat, Inc.
+ *
+ * Authors: Alexander Larsson <alexl 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, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef __GTK_WIN32_THEME_PART_H__
+#define __GTK_WIN32_THEME_PART_H__
+
+#include "gtkcssparserprivate.h"
+
+G_BEGIN_DECLS
+
+typedef struct _GtkWin32ThemePart GtkWin32ThemePart;
+
+#define GTK_TYPE_WIN32_THEME_PART (_gtk_win32_theme_part_get_type ())
+
+GType              _gtk_win32_theme_part_get_type  (void) G_GNUC_CONST;
+
+GtkWin32ThemePart *_gtk_win32_theme_part_new       (const char *class, 
+						    int xp_part, int state);
+GtkWin32ThemePart *_gtk_win32_theme_part_ref       (GtkWin32ThemePart *part);
+void               _gtk_win32_theme_part_unref     (GtkWin32ThemePart *part);
+int                _gtk_win32_theme_part_parse     (GtkCssParser      *parser, 
+						    GFile             *base, 
+						    GValue            *value);
+cairo_pattern_t   *_gtk_win32_theme_part_render   (GtkWin32ThemePart  *part,
+						   int                 width,
+						   int                 height);
+
+G_END_DECLS
+
+#endif /* __GTK_WIN32_THEME_PART_H__ */



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