brl/gnome-shell
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Import stylesheet code from hippo-canvas

Browse Source 
Import:

  HippoCanvasTheme      => StTheme
  HippoCanvasThemeImage => StThemeImage
  HippoCanvasStyle      => StThemeNode

StThemeContext is a new class managing the theme for a stage and
global properties like resolution.

test-theme.c is a newly written test program to do verification of the
style matching and property handling rules.

Various changes are made in the import:

 - Comprehensive reindentation
 - guint32 pixels replaced with ClutterColor
 - General pseudo-class support added
 - Old-fashioned (non-bordered) background image support added, though
   with no support for repeat, etc.
 - Bug fixes for problems revealed by test program

https://bugzilla.gnome.org/show_bug.cgi?id=595990
This commit is contained in:
Owen W. Taylor 2009-09-19 20:43:49 -04:00
parent 6b95864076
commit 276d9a9302
15 changed files with 3821 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
.gitignore vendored
View File

@ -38,6 +38,7 @@ src/gnomeshell-taskpanel
src/gnome-shell
src/test-recorder
src/test-recorder.ogg
src/test-theme
stamp-h1
tests/run-test.sh
xmldocs.make

1
configure.ac
View File

@ -60,6 +60,7 @@ PKG_CHECK_MODULES(TIDY, clutter-1.0)
PKG_CHECK_MODULES(ST, clutter-1.0 gtk+-2.0 libccss-1 >= 0.3.1 clutter-imcontext-0.1)
PKG_CHECK_MODULES(BIG, clutter-1.0 gtk+-2.0 librsvg-2.0)
PKG_CHECK_MODULES(GDMUSER, dbus-glib-1 gtk+-2.0)
PKG_CHECK_MODULES(TOOLKIT, clutter-1.0 libcroco-0.6)
PKG_CHECK_MODULES(TRAY, gtk+-2.0)
MUTTER_BIN_DIR=`$PKG_CONFIG --variable=exec_prefix mutter-plugins`/bin

21
src/Makefile-st.am
View File

@ -73,7 +73,6 @@ st_source_h = \
st/st-clipboard.h \
st/st-entry.h \
st/st-label.h \
st/st-private.h \
st/st-stylable.h \
st/st-style.h \
st/st-scrollable.h \
@ -82,11 +81,19 @@ st_source_h = \
st/st-subtexture.h \
st/st-texture-cache.h \
st/st-texture-frame.h \
st/st-theme.h \
st/st-theme-context.h \
st/st-theme-image.h \
st/st-theme-node.h \
st/st-tooltip.h \
st/st-types.h \
st/st-widget.h \
$(NULL)
st_source_private_h = \
st/st-private.h \
st/st-theme-private.h
# please, keep this sorted alphabetically
st_source_c = \
st/st-adjustment.c \
@ -106,6 +113,10 @@ st_source_c = \
st/st-subtexture.c \
st/st-texture-cache.c \
st/st-texture-frame.c \
st/st-theme.c \
st/st-theme-context.c \
st/st-theme-image.c \
st/st-theme-node.c \
st/st-tooltip.c \
st/st-widget.c \
$(NULL)
@ -115,8 +126,16 @@ noinst_LTLIBRARIES += libst-1.0.la
libst_1_0_la_LIBADD = $(ST_LIBS)
libst_1_0_la_SOURCES = \
$(st_source_c) \
$(st_source_private_c) \
$(st_source_h) \
$(st_built_sources) \
$(NULL)
libst_1_0_la_CPPFLAGS = $(st_cflags)
libst_1_0_la_LDFLAGS = $(LDADD)
noinst_PROGRAMS += test-theme
test_theme_CPPFLAGS = $(st_cflags)
test_theme_LDADD = libst-1.0.la
test_theme_SOURCES = st/test-theme.c

5
src/Makefile.am
View File

@ -4,6 +4,7 @@ CLEANFILES =
EXTRA_DIST =
libexec_PROGRAMS =
noinst_LTLIBRARIES =
noinst_PROGRAMS =
.AUTOPARALLEL:
@ -95,7 +96,7 @@ libgnome_shell_la_SOURCES = \
shell-wm.c \
shell-wm.h
non_gir_sources = \
non_gir_sources = \
shell-embedded-window-private.h
shell_recorder_sources = \
@ -113,7 +114,7 @@ if BUILD_RECORDER
libgnome_shell_la_SOURCES += $(shell_recorder_sources)
non_gir_sources += $(shell_recorder_non_gir_sources)
noinst_PROGRAMS = test-recorder
noinst_PROGRAMS += test-recorder
test_recorder_CPPFLAGS = $(TEST_SHELL_RECORDER_CFLAGS)
test_recorder_LDADD = $(TEST_SHELL_RECORDER_LIBS)

287
src/st/st-theme-context.c Normal file
View File

@ -0,0 +1,287 @@
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
#include <config.h>
#include "st-theme.h"
#include "st-theme-context.h"
struct _StThemeContext {
GObject parent;
double resolution;
PangoFontDescription *font;
StThemeNode *root_node;
StTheme *theme;
};
struct _StThemeContextClass {
GObjectClass parent_class;
};
#define DEFAULT_RESOLUTION 96.
#define DEFAULT_FONT "sans-serif 10"
enum
{
CHANGED,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL] = { 0, };
G_DEFINE_TYPE (StThemeContext, st_theme_context, G_TYPE_OBJECT)
static void
st_theme_context_finalize (GObject *object)
{
StThemeContext *context = ST_THEME_CONTEXT (object);
if (context->root_node)
g_object_unref (context->root_node);
if (context->theme)
g_object_unref (context->theme);
pango_font_description_free (context->font);
G_OBJECT_CLASS (st_theme_context_parent_class)->finalize (object);
}
static void
st_theme_context_class_init (StThemeContextClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = st_theme_context_finalize;
signals[CHANGED] =
g_signal_new ("changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
0, /* no default handler slot */
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
}
static void
st_theme_context_init (StThemeContext *context)
{
context->resolution = DEFAULT_RESOLUTION;
context->font = pango_font_description_from_string (DEFAULT_FONT);
}
/**
* st_theme_context_new:
*
* Create a new theme context not associated with any #ClutterStage.
* This can be useful in testing scenarios, or if using StThemeContext
* with something other than #ClutterActor objects, but you generally
* should use st_theme_context_get_for_stage() instead.
*/
StThemeContext *
st_theme_context_new (void)
{
StThemeContext *context;
context = g_object_new (ST_TYPE_THEME_CONTEXT, NULL);
return context;
}
static void
on_stage_destroy (ClutterStage *stage)
{
StThemeContext *context = st_theme_context_get_for_stage (stage);
g_object_set_data (G_OBJECT (stage), "st-theme-context", NULL);
g_object_unref (context);
}
static void
st_theme_context_changed (StThemeContext *context)
{
StThemeNode *old_root = context->root_node;
context->root_node = NULL;
g_signal_emit (context, signals[CHANGED], 0);
if (old_root)
g_object_unref (old_root);
}
/**
* st_theme_context_get_for_stage:
* @stage: a #ClutterStage
*
* Gets a singleton theme context associated with the stage.
*
* Return value: (transfer none): the singleton theme context for the stage
*/
StThemeContext *
st_theme_context_get_for_stage (ClutterStage *stage)
{
StThemeContext *context;
g_return_val_if_fail (CLUTTER_IS_STAGE (stage), NULL);
context = g_object_get_data (G_OBJECT (stage), "st-theme-context");
if (context)
return context;
context = st_theme_context_new ();
g_object_set_data (G_OBJECT (stage), "st-theme-context", context);
g_signal_connect (stage, "destroy",
G_CALLBACK (on_stage_destroy), NULL);
return context;
}
/**
* st_theme_context_set_theme:
* @context: a #StThemeContext
*
* Sets the default set of theme stylesheets for the context. This theme will
* be used for the root node and for nodes descending from it, unless some other
* style is explicitely specified.
*/
void
st_theme_context_set_theme (StThemeContext *context,
StTheme *theme)
{
g_return_if_fail (ST_IS_THEME_CONTEXT (context));
g_return_if_fail (theme == NULL || ST_IS_THEME (theme));
if (context->theme != theme)
{
if (context->theme)
g_object_unref (context->theme);
context->theme = theme;
if (context->theme)
g_object_ref (context->theme);
st_theme_context_changed (context);
}
}
/**
* st_theme_context_get_theme:
* @context: a #StThemeContext
*
* Gets the default theme for the context. See st_theme_context_set_theme()
*
* Return value: (transfer none): the default theme for the context
*/
StTheme *
st_theme_context_get_theme (StThemeContext *context)
{
g_return_val_if_fail (ST_IS_THEME_CONTEXT (context), NULL);
return context->theme;
}
/**
* st_theme_context_set_resolution:
* @context: a #StThemeContext
* @resolution: resolution of the context (number of pixels in an "inch")
*
* Sets the resolution of the theme context. This is the scale factor
* used to convert between points and the length units pt, in, and cm.
* This does not necessarily need to correspond to the actual number
* resolution of the device. A value of 72. means that points and
* pixels are identical. The default value is 96.
*/
void
st_theme_context_set_resolution (StThemeContext *context,
double resolution)
{
g_return_if_fail (ST_IS_THEME_CONTEXT (context));
if (resolution == context->resolution)
return;
context->resolution = resolution;
st_theme_context_changed (context);
}
/**
* st_theme_context_set_resolution:
* @context: a #StThemeContext
*
* Gets the current resolution of the theme context.
* See st_theme_context_set_resolution().
*
* Return value: the resolution (in dots-per-"inch")
*/
double
st_theme_context_get_resolution (StThemeContext *context)
{
g_return_val_if_fail (ST_IS_THEME_CONTEXT (context), DEFAULT_RESOLUTION);
return context->resolution;
}
/**
* st_theme_context_set_font:
* @context: a #StThemeContext
* @font: the default font for theme context
*
* Sets the default font for the theme context. This is the font that
* is inherited by the root node of the tree of theme nodes. If the
* font is not overriden, then this font will be used. If the font is
* partially modified (for example, with 'font-size: 110%', then that
* modification is based on this font.
*/
void
st_theme_context_set_font (StThemeContext *context,
const PangoFontDescription *font)
{
g_return_if_fail (ST_IS_THEME_CONTEXT (context));
g_return_if_fail (font != NULL);
if (context->font == font ||
pango_font_description_equal (context->font, font))
return;
pango_font_description_free (context->font);
context->font = pango_font_description_copy (font);
st_theme_context_changed (context);
}
/**
* st_theme_context_get_font:
* @context: a #StThemeContext
*
* Gets the default font for the theme context. See st_theme_context_set_font().
*
* Return value: the default font for the theme context.
*/
const PangoFontDescription *
st_theme_context_get_font (StThemeContext *context)
{
g_return_val_if_fail (ST_IS_THEME_CONTEXT (context), NULL);
return context->font;
}
/**
* st_theme_context_get_root_node:
* @context: a #StThemeContext
*
* Gets the root node of the tree of theme style nodes that associated with this
* context. For the node tree associated with a stage, this node represents
* styles applied to the stage itself.
*
* Return value: (transfer none): the root node of the context's style tree
*/
StThemeNode *
st_theme_context_get_root_node (StThemeContext *context)
{
if (context->root_node == NULL)
context->root_node = st_theme_node_new (context, NULL, context->theme,
G_TYPE_NONE, NULL, NULL, NULL);
return context->root_node;
}

50
src/st/st-theme-context.h Normal file
View File

@ -0,0 +1,50 @@
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
#ifndef __ST_THEME_CONTEXT_H__
#define __ST_THEME_CONTEXT_H__
#include <clutter/clutter.h>
#include <pango/pango.h>
#include "st-theme-node.h"
G_BEGIN_DECLS
/**
* SECTION:StThemeContext
* @short_description: holds global information about a tree of styled objects
*
* #StThemeContext is responsible for managing information global to a tree of styled objects,
* such as the set of stylesheets or the default font. In normal usage, a #StThemeContext
* is bound to a #ClutterStage; a singleton #StThemeContext can be obtained for a #ClutterStage
* by using st_theme_context_get_for_stage().
*/
typedef struct _StThemeContextClass StThemeContextClass;
#define ST_TYPE_THEME_CONTEXT (st_theme_context_get_type ())
#define ST_THEME_CONTEXT(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), ST_TYPE_THEME_CONTEXT, StThemeContext))
#define ST_THEME_CONTEXT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), ST_TYPE_THEME_CONTEXT, StThemeContextClass))
#define ST_IS_THEME_CONTEXT(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), ST_TYPE_THEME_CONTEXT))
#define ST_IS_THEME_CONTEXT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), ST_TYPE_THEME_CONTEXT))
#define ST_THEME_CONTEXT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), ST_TYPE_THEME_CONTEXT, StThemeContextClass))
GType st_theme_context_get_type (void) G_GNUC_CONST;
StThemeContext *st_theme_context_new (void);
StThemeContext *st_theme_context_get_for_stage (ClutterStage *stage);
void st_theme_context_set_theme (StThemeContext *context,
StTheme *theme);
StTheme * st_theme_context_get_theme (StThemeContext *context);
void st_theme_context_set_resolution (StThemeContext *context,
gdouble resolution);
double st_theme_context_get_resolution (StThemeContext *context);
void st_theme_context_set_font (StThemeContext *context,
const PangoFontDescription *font);
const PangoFontDescription *st_theme_context_get_font (StThemeContext *context);
StThemeNode * st_theme_context_get_root_node (StThemeContext *context);
G_END_DECLS
#endif /* __ST_THEME_CONTEXT_H__ */

92
src/st/st-theme-image.c Normal file
View File

@ -0,0 +1,92 @@
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
#include <config.h>
#include "st-theme-image.h"
struct _StThemeImage {
GObject parent;
char *filename;
int border_top;
int border_right;
int border_bottom;
int border_left;
};
struct _StThemeImageClass {
GObjectClass parent_class;
};
G_DEFINE_TYPE (StThemeImage, st_theme_image, G_TYPE_OBJECT)
static void
st_theme_image_finalize (GObject *object)
{
StThemeImage *image = ST_THEME_IMAGE (object);
g_free (image->filename);
G_OBJECT_CLASS (st_theme_image_parent_class)->finalize (object);
}
static void
st_theme_image_class_init (StThemeImageClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = st_theme_image_finalize;
}
static void
st_theme_image_init (StThemeImage *image)
{
}
StThemeImage *
st_theme_image_new (const char *filename,
int border_top,
int border_right,
int border_bottom,
int border_left)
{
StThemeImage *image;
image = g_object_new (ST_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 *
st_theme_image_get_filename (StThemeImage *image)
{
g_return_val_if_fail (ST_IS_THEME_IMAGE (image), NULL);
return image->filename;
}
void
st_theme_image_get_borders (StThemeImage *image,
int *border_top,
int *border_right,
int *border_bottom,
int *border_left)
{
g_return_if_fail (ST_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;
}

38
src/st/st-theme-image.h Normal file
View File

@ -0,0 +1,38 @@
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
#ifndef __ST_THEME_IMAGE_H__
#define __ST_THEME_IMAGE_H__
#include <glib-object.h>
G_BEGIN_DECLS
/* A StThemeImage encapsulates an image with specified unscaled borders on each edge.
*/
typedef struct _StThemeImage StThemeImage;
typedef struct _StThemeImageClass StThemeImageClass;
#define ST_TYPE_THEME_IMAGE (st_theme_image_get_type ())
#define ST_THEME_IMAGE(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), ST_TYPE_THEME_IMAGE, StThemeImage))
#define ST_THEME_IMAGE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), ST_TYPE_THEME_IMAGE, StThemeImageClass))
#define ST_IS_THEME_IMAGE(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), ST_TYPE_THEME_IMAGE))
#define ST_IS_THEME_IMAGE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), ST_TYPE_THEME_IMAGE))
#define ST_THEME_IMAGE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), ST_TYPE_THEME_IMAGE, StThemeImageClass))
GType st_theme_image_get_type (void) G_GNUC_CONST;
StThemeImage *st_theme_image_new (const char *filename,
int border_top,
int border_right,
int border_bottom,
int border_left);
const char *st_theme_image_get_filename (StThemeImage *image);
void st_theme_image_get_borders (StThemeImage *image,
int *border_top,
int *border_right,
int *border_bottom,
int *border_left);
G_END_DECLS
#endif /* __ST_THEME_IMAGE_H__ */

1813
src/st/st-theme-node.c Normal file
View File

File diff suppressed because it is too large Load Diff

125
src/st/st-theme-node.h Normal file
View File

@ -0,0 +1,125 @@
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
#ifndef __ST_THEME_NODE_H__
#define __ST_THEME_NODE_H__
#include <clutter/clutter.h>
#include "st-theme-image.h"
G_BEGIN_DECLS
/**
* SECTION:StThemeNode
* @short_description: style information for one node in a tree of themed objects
*
* A #StThemeNode represents the CSS style information (the set of CSS properties) for one
* node in a tree of themed objects. In typical usage, it represents the style information
* for a single #ClutterActor. A #StThemeNode is immutable: attributes such as the
* CSS classes for the node are passed in at construction. If the attributes of the node
* or any parent node change, the node should be discarded and a new node created.
* #StThemeNode has generic accessors to look up properties by name and specific
* accessors for standard CSS properties that add caching and handling of various
* details of the CSS specification. #StThemeNode also has convenience functions to help
* in implementing a #ClutterActor with borders and padding.
*/
typedef struct _StTheme StTheme;
typedef struct _StThemeContext StThemeContext;
typedef struct _StThemeNode StThemeNode;
typedef struct _StThemeNodeClass StThemeNodeClass;
#define ST_TYPE_THEME_NODE (st_theme_node_get_type ())
#define ST_THEME_NODE(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), ST_TYPE_THEME_NODE, StThemeNode))
#define ST_THEME_NODE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), ST_TYPE_THEME_NODE, StThemeNodeClass))
#define ST_IS_THEME_NODE(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), ST_TYPE_THEME_NODE))
#define ST_IS_THEME_NODE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), ST_TYPE_THEME_NODE))
#define ST_THEME_NODE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), ST_TYPE_THEME_NODE, StThemeNodeClass))
typedef enum {
ST_SIDE_LEFT,
ST_SIDE_RIGHT,
ST_SIDE_TOP,
ST_SIDE_BOTTOM
} StSide;
/* These are the CSS values; that doesn't mean we have to implement blink... */
typedef enum {
ST_TEXT_DECORATION_UNDERLINE = 1 << 0,
ST_TEXT_DECORATION_OVERLINE = 1 << 1,
ST_TEXT_DECORATION_LINE_THROUGH = 1 << 2,
ST_TEXT_DECORATION_BLINK = 1 << 3
} StTextDecoration;
GType st_theme_node_get_type (void) G_GNUC_CONST;
StThemeNode *st_theme_node_new (StThemeContext *context,
StThemeNode *parent_node, /* can be null */
StTheme *theme, /* can be null */
GType element_type,
const char *element_id,
const char *element_class,
const char *pseudo_class);
StThemeNode *st_theme_node_get_parent (StThemeNode *node);
StTheme *st_theme_node_get_theme (StThemeNode *node);
GType st_theme_node_get_element_type (StThemeNode *node);
const char *st_theme_node_get_element_id (StThemeNode *node);
const char *st_theme_node_get_element_class (StThemeNode *node);
const char *st_theme_node_get_pseudo_class (StThemeNode *node);
/* Generic getters ... these are not cached so are less efficient. The other
* reason for adding the more specific version is that we can handle the
* details of the actual CSS rules, which can be complicated, especially
* for fonts
*/
gboolean st_theme_node_get_color (StThemeNode *node,
const char *property_name,
gboolean inherit,
ClutterColor *color);
gboolean st_theme_node_get_double (StThemeNode *node,
const char *property_name,
gboolean inherit,
double *value);
gboolean st_theme_node_get_length (StThemeNode *node,
const char *property_name,
gboolean inherit,
gdouble *length);
/* Specific getters for particular properties: cached
*/
void st_theme_node_get_background_color (StThemeNode *node,
ClutterColor *color);
void st_theme_node_get_foreground_color (StThemeNode *node,
ClutterColor *color);
const char *st_theme_node_get_background_image (StThemeNode *node);
double st_theme_node_get_border_width (StThemeNode *node,
StSide side);
void st_theme_node_get_border_color (StThemeNode *node,
StSide side,
ClutterColor *color);
double st_theme_node_get_padding (StThemeNode *node,
StSide side);
StTextDecoration st_theme_node_get_text_decoration (StThemeNode *node);
/* Font rule processing is pretty complicated, so we just hardcode it
* under the standard font/font-family/font-size/etc names. This means
* you can't have multiple separate styled fonts for a single item,
* but that should be OK.
*/
const PangoFontDescription *st_theme_node_get_font (StThemeNode *node);
/* This is the getter for -st-background-image, which is different from
* background-image in having provisions for unscaled borders.
*/
StThemeImage *st_theme_node_get_background_theme_image (StThemeNode *node);
G_END_DECLS
#endif /* __ST_THEME_NODE_H__ */

22
src/st/st-theme-private.h Normal file
View File

@ -0,0 +1,22 @@
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
#ifndef __ST_THEME_PRIVATE_H__
#define __ST_THEME_PRIVATE_H__
#include <libcroco/libcroco.h>
#include "st-theme.h"
G_BEGIN_DECLS
void _st_theme_get_matched_properties (StTheme *theme,
StThemeNode *node,
CRDeclaration ***properties,
int *n_properties);
/* Resolve an URL from the stylesheet to a filename */
char *_st_theme_resolve_url (StTheme *theme,
CRStyleSheet *base_stylesheet,
const char *url);
G_END_DECLS
#endif /* __ST_THEME_PRIVATE_H__ */

971
src/st/st-theme.c Normal file
View File

@ -0,0 +1,971 @@
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/* This file started as a cut-and-paste of cr-sel-eng.c from libcroco.
*
* In moving it to hippo-canvas:
* - Reformatted and otherwise edited to match our coding style
* - Switched from handling xmlNode to handling HippoStyle
* - Simplified by removing things that we don't need or that don't
* make sense in our context.
* - The code to get a list of matching properties works quite differently;
* we order things in priority order, but we don't actually try to
* coalesce properties with the same name.
*
* In moving it to GNOME Shell:
* - Renamed again to StTheme
* - Reformatted to match the gnome-shell coding style
* - Removed notion of "theme engine" from hippo-canvas
* - pseudo-class matching changed from link enum to strings
* - Some code simplification
*/
/*
* This file is part of The Croco Library
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2.1 of the GNU Lesser General Public
* License as published by the Free Software Foundation.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU Lesser
* General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*
* Copyright (C) 2003-2004 Dodji Seketeli. All Rights Reserved.
*/
#include <stdlib.h>
#include <string.h>
#include "st-theme-node.h"
#include "st-theme-private.h"
static GObject *st_theme_constructor (GType type,
guint n_construct_properties,
GObjectConstructParam *construct_properties);
static void st_theme_finalize (GObject *object);
static void st_theme_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void st_theme_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
struct _StTheme
{
GObject parent;
char *application_stylesheet;
char *default_stylesheet;
char *theme_stylesheet;
GHashTable *stylesheets_by_filename;
GHashTable *filenames_by_stylesheet;
CRCascade *cascade;
};
struct _StThemeClass
{
GObjectClass parent_class;
};
enum
{
PROP_0,
PROP_APPLICATION_STYLESHEET,
PROP_THEME_STYLESHEET,
PROP_DEFAULT_STYLESHEET
};
G_DEFINE_TYPE (StTheme, st_theme, G_TYPE_OBJECT)
/* Quick strcmp. Test only for == 0 or != 0, not < 0 or > 0. */
#define strqcmp(str,lit,lit_len) \
(strlen (str) != (lit_len) || memcmp (str, lit, lit_len))
static void
st_theme_init (StTheme *theme)
{
theme->stylesheets_by_filename = g_hash_table_new_full (g_str_hash, g_str_equal,
(GDestroyNotify)g_free, (GDestroyNotify)cr_stylesheet_unref);
theme->filenames_by_stylesheet = g_hash_table_new (g_direct_hash, g_direct_equal);
}
static void
st_theme_class_init (StThemeClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->constructor = st_theme_constructor;
object_class->finalize = st_theme_finalize;
object_class->set_property = st_theme_set_property;
object_class->get_property = st_theme_get_property;
/**
* StTheme:application-stylesheet:
*
* The highest priority stylesheet, representing application-specific
* styling; this is associated with the CSS "author" stylesheet.
*/
g_object_class_install_property (object_class,
PROP_APPLICATION_STYLESHEET,
g_param_spec_string ("application-stylesheet",
"Application Stylesheet",
"Stylesheet with application-specific styling",
NULL,
G_PARAM_READABLE | G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY));
/**
* StTheme:theme-stylesheet:
*
* The second priority stylesheet, representing theme-specific styling;
* this is associated with the CSS "user" stylesheet.
*/
g_object_class_install_property (object_class,
PROP_THEME_STYLESHEET,
g_param_spec_string ("theme-stylesheet",
"Theme Stylesheet",
"Stylesheet with theme-specific styling",
NULL,
G_PARAM_READABLE | G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY));
/**
* StTheme:default-stylesheet:
*
* The lowest priority stylesheet, representing global default
* styling; this is associated with the CSS "user agent" stylesheet.
*/
g_object_class_install_property (object_class,
PROP_DEFAULT_STYLESHEET,
g_param_spec_string ("default-stylesheet",
"Default Stylesheet",
"Stylesheet with global default styling",
NULL,
G_PARAM_READABLE | G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY));
}
static CRStyleSheet *
parse_stylesheet (const char *filename)
{
enum CRStatus status;
CRStyleSheet *stylesheet;
if (filename == NULL)
return NULL;
status = cr_om_parser_simply_parse_file ((const guchar *) filename,
CR_UTF_8,
&stylesheet);
if (status != CR_OK)
{
g_warning ("Error parsing stylesheet '%s'", filename);
return NULL;
}
return stylesheet;
}
static void
insert_stylesheet (StTheme *theme,
const char *filename,
CRStyleSheet *stylesheet)
{
char *filename_copy;
if (stylesheet == NULL)
return;
filename_copy = g_strdup(filename);
cr_stylesheet_ref (stylesheet);
g_hash_table_insert (theme->stylesheets_by_filename, filename_copy, stylesheet);
g_hash_table_insert (theme->filenames_by_stylesheet, stylesheet, filename_copy);
}
static GObject *
st_theme_constructor (GType type,
guint n_construct_properties,
GObjectConstructParam *construct_properties)
{
GObject *object;
StTheme *theme;
CRStyleSheet *application_stylesheet;
CRStyleSheet *theme_stylesheet;
CRStyleSheet *default_stylesheet;
object = (*G_OBJECT_CLASS (st_theme_parent_class)->constructor) (type,
n_construct_properties,
construct_properties);
theme = ST_THEME (object);
application_stylesheet = parse_stylesheet (theme->application_stylesheet);
theme_stylesheet = parse_stylesheet (theme->theme_stylesheet);
default_stylesheet = parse_stylesheet (theme->default_stylesheet);
theme->cascade = cr_cascade_new (application_stylesheet,
theme_stylesheet,
default_stylesheet);
if (theme->cascade == NULL)
g_error ("Out of memory when creating cascade object");
insert_stylesheet (theme, theme->application_stylesheet, application_stylesheet);
insert_stylesheet (theme, theme->theme_stylesheet, theme_stylesheet);
insert_stylesheet (theme, theme->default_stylesheet, default_stylesheet);
return object;
}
static void
st_theme_finalize (GObject * object)
{
StTheme *theme = ST_THEME (object);
g_hash_table_destroy (theme->stylesheets_by_filename);
g_hash_table_destroy (theme->filenames_by_stylesheet);
g_free (theme->application_stylesheet);
g_free (theme->theme_stylesheet);
g_free (theme->default_stylesheet);
if (theme->cascade)
{
cr_cascade_unref (theme->cascade);
theme->cascade = NULL;
}
G_OBJECT_CLASS (st_theme_parent_class)->finalize (object);
}
static void
st_theme_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
StTheme *theme = ST_THEME (object);
switch (prop_id)
{
case PROP_APPLICATION_STYLESHEET:
{
const char *path = g_value_get_string (value);
if (path != theme->application_stylesheet)
{
g_free (theme->application_stylesheet);
theme->application_stylesheet = g_strdup (path);
}
break;
}
case PROP_THEME_STYLESHEET:
{
const char *path = g_value_get_string (value);
if (path != theme->theme_stylesheet)
{
g_free (theme->theme_stylesheet);
theme->theme_stylesheet = g_strdup (path);
}
break;
}
case PROP_DEFAULT_STYLESHEET:
{
const char *path = g_value_get_string (value);
if (path != theme->default_stylesheet)
{
g_free (theme->default_stylesheet);
theme->default_stylesheet = g_strdup (path);
}
break;
}
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
st_theme_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
StTheme *theme = ST_THEME (object);
switch (prop_id)
{
case PROP_APPLICATION_STYLESHEET:
g_value_set_string (value, theme->application_stylesheet);
break;
case PROP_THEME_STYLESHEET:
g_value_set_string (value, theme->theme_stylesheet);
break;
case PROP_DEFAULT_STYLESHEET:
g_value_set_string (value, theme->default_stylesheet);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/**
* st_theme_new:
* @application_stylesheet: The highest priority stylesheet, representing application-specific
* styling; this is associated with the CSS "author" stylesheet, may be %NULL
* @theme_stylesheet: The second priority stylesheet, representing theme-specific styling ;
* this is associated with the CSS "user" stylesheet, may be %NULL
* @default_stylesheet: The lowest priority stylesheet, representing global default styling;
* this is associated with the CSS "user agent" stylesheet, may be %NULL
*
* Return value: the newly created theme object
**/
StTheme *
st_theme_new (const char *application_stylesheet,
const char *theme_stylesheet,
const char *default_stylesheet)
{
StTheme *theme = g_object_new (ST_TYPE_THEME,
"application-stylesheet", application_stylesheet,
"theme-stylesheet", theme_stylesheet,
"default-stylesheet", default_stylesheet,
NULL);
return theme;
}
static gboolean
string_in_list (GString *stryng,
const char *list)
{
const char *cur;
for (cur = list; *cur;)
{
while (*cur && cr_utils_is_white_space (*cur))
cur++;
if (strncmp (cur, stryng->str, stryng->len) == 0)
{
cur += stryng->len;
if ((!*cur) || cr_utils_is_white_space (*cur))
return TRUE;
}
/* skip to next whitespace character */
while (*cur && !cr_utils_is_white_space (*cur))
cur++;
}
return FALSE;
}
static gboolean
pseudo_class_add_sel_matches_style (StTheme *a_this,
CRAdditionalSel *a_add_sel,
StThemeNode *a_node)
{
const char *node_pseudo_class;
g_return_val_if_fail (a_this
&& a_add_sel
&& a_add_sel->content.pseudo
&& a_add_sel->content.pseudo->name
&& a_add_sel->content.pseudo->name->stryng
&& a_add_sel->content.pseudo->name->stryng->str
&& a_node, FALSE);
node_pseudo_class = st_theme_node_get_pseudo_class (a_node);
if (node_pseudo_class == NULL)
return FALSE;
return string_in_list (a_add_sel->content.pseudo->name->stryng, node_pseudo_class);
}
/**
*@param a_add_sel the class additional selector to consider.
*@param a_node the style node to consider.
*@return TRUE if the class additional selector matches
*the style node given in argument, FALSE otherwise.
*/
static gboolean
class_add_sel_matches_style (CRAdditionalSel *a_add_sel,
StThemeNode *a_node)
{
const char *element_class;
g_return_val_if_fail (a_add_sel
&& a_add_sel->type == CLASS_ADD_SELECTOR
&& a_add_sel->content.class_name
&& a_add_sel->content.class_name->stryng
&& a_add_sel->content.class_name->stryng->str
&& a_node, FALSE);
element_class = st_theme_node_get_element_class (a_node);
if (element_class == NULL)
return FALSE;
return string_in_list (a_add_sel->content.class_name->stryng, element_class);
}
/**
*@return TRUE if the additional attribute selector matches
*the current style node given in argument, FALSE otherwise.
*@param a_add_sel the additional attribute selector to consider.
*@param a_node the style node to consider.
*/
static gboolean
id_add_sel_matches_style (CRAdditionalSel *a_add_sel,
StThemeNode *a_node)
{
gboolean result = FALSE;
const char *id;
g_return_val_if_fail (a_add_sel
&& a_add_sel->type == ID_ADD_SELECTOR
&& a_add_sel->content.id_name
&& a_add_sel->content.id_name->stryng
&& a_add_sel->content.id_name->stryng->str
&& a_node, FALSE);
g_return_val_if_fail (a_add_sel
&& a_add_sel->type == ID_ADD_SELECTOR
&& a_node, FALSE);
id = st_theme_node_get_element_id (a_node);
if (id != NULL)
{
if (!strqcmp (id, a_add_sel->content.id_name->stryng->str,
a_add_sel->content.id_name->stryng->len))
{
result = TRUE;
}
}
return result;
}
/**
*Evaluates if a given additional selector matches an style node.
*@param a_add_sel the additional selector to consider.
*@param a_node the style node to consider.
*@return TRUE is a_add_sel matches a_node, FALSE otherwise.
*/
static gboolean
additional_selector_matches_style (StTheme *a_this,
CRAdditionalSel *a_add_sel,
StThemeNode *a_node)
{
CRAdditionalSel *cur_add_sel = NULL;
g_return_val_if_fail (a_add_sel, FALSE);
for (cur_add_sel = a_add_sel; cur_add_sel; cur_add_sel = cur_add_sel->next)
{
switch (cur_add_sel->type)
{
case NO_ADD_SELECTOR:
return FALSE;
case CLASS_ADD_SELECTOR:
if (!class_add_sel_matches_style (cur_add_sel, a_node))
return FALSE;
break;
case ID_ADD_SELECTOR:
if (!id_add_sel_matches_style (cur_add_sel, a_node))
return FALSE;
break;
case ATTRIBUTE_ADD_SELECTOR:
g_warning ("Attribute selectors not supported");
return FALSE;
case PSEUDO_CLASS_ADD_SELECTOR:
if (!pseudo_class_add_sel_matches_style (a_this, cur_add_sel, a_node))
return FALSE;
break;
}
}
return TRUE;
}
static gboolean
element_name_matches_type (const char *element_name,
GType element_type)
{
if (element_type == G_TYPE_NONE)
{
return strcmp (element_name, "stage") == 0;
}
else
{
GType match_type = g_type_from_name (element_name);
if (match_type == G_TYPE_INVALID)
return FALSE;
return g_type_is_a (element_type, match_type);
}
}
/**
*Evaluate a selector (a simple selectors list) and says
*if it matches the style node given in parameter.
*The algorithm used here is the following:
*Walk the combinator separated list of simple selectors backward, starting
*from the end of the list. For each simple selector, looks if
*if matches the current style.
*
*@param a_this the selection engine.
*@param a_sel the simple selection list.
*@param a_node the style node.
*@param a_result out parameter. Set to true if the
*selector matches the style node, FALSE otherwise.
*@param a_recurse if set to TRUE, the function will walk to
*the next simple selector (after the evaluation of the current one)
*and recursively evaluate it. Must be usually set to TRUE unless you
*know what you are doing.
*/
static enum CRStatus
sel_matches_style_real (StTheme *a_this,
CRSimpleSel *a_sel,
StThemeNode *a_node,
gboolean *a_result,
gboolean a_eval_sel_list_from_end,
gboolean a_recurse)
{
CRSimpleSel *cur_sel = NULL;
StThemeNode *cur_node = NULL;
GType cur_type;
*a_result = FALSE;
if (a_eval_sel_list_from_end)
{
/*go and get the last simple selector of the list */
for (cur_sel = a_sel; cur_sel && cur_sel->next; cur_sel = cur_sel->next)
;
}
else
{
cur_sel = a_sel;
}
cur_node = a_node;
cur_type = st_theme_node_get_element_type (cur_node);
while (cur_sel)
{
if (((cur_sel->type_mask & TYPE_SELECTOR)
&& (cur_sel->name
&& cur_sel->name->stryng
&& cur_sel->name->stryng->str)
&&
(element_name_matches_type (cur_sel->name->stryng->str, cur_type)))
|| (cur_sel->type_mask & UNIVERSAL_SELECTOR))
{
/*
*this simple selector
*matches the current style node
*Let's see if the preceding
*simple selectors also match
*their style node counterpart.
*/
if (cur_sel->add_sel)
{
if (additional_selector_matches_style (a_this, cur_sel->add_sel, cur_node))
goto walk_a_step_in_expr;
else
goto done;
}
else
goto walk_a_step_in_expr;
}
if (!(cur_sel->type_mask & TYPE_SELECTOR)
&& !(cur_sel->type_mask & UNIVERSAL_SELECTOR))
{
if (!cur_sel->add_sel)
goto done;
if (additional_selector_matches_style (a_this, cur_sel->add_sel, cur_node))
goto walk_a_step_in_expr;
else
goto done;
}
else
{
goto done;
}
walk_a_step_in_expr:
if (a_recurse == FALSE)
{
*a_result = TRUE;
goto done;
}
/*
*here, depending on the combinator of cur_sel
*choose the axis of the element tree traversal
*and walk one step in the element tree.
*/
if (!cur_sel->prev)
break;
switch (cur_sel->combinator)
{
case NO_COMBINATOR:
break;
case COMB_WS: /*descendant selector */
{
StThemeNode *n = NULL;
/*
*walk the element tree upward looking for a parent
*style that matches the preceding selector.
*/
for (n = st_theme_node_get_parent (a_node); n; n = st_theme_node_get_parent (n))
{
enum CRStatus status;
gboolean matches = FALSE;
status = sel_matches_style_real (a_this, cur_sel->prev, n, &matches, FALSE, TRUE);
if (status != CR_OK)
goto done;
if (matches)
{
cur_node = n;
cur_type = st_theme_node_get_element_type (cur_node);
break;
}
}
if (!n)
{
/*
*didn't find any ancestor that matches
*the previous simple selector.
*/
goto done;
}
/*
*in this case, the preceding simple sel
*will have been interpreted twice, which
*is a cpu and mem waste ... I need to find
*another way to do this. Anyway, this is
*my first attempt to write this function and
*I am a bit clueless.
*/
break;
}
case COMB_PLUS:
g_warning ("+ combinators are not supported");
goto done;
case COMB_GT:
cur_node = st_theme_node_get_parent (cur_node);
if (!cur_node)
goto done;
cur_type = st_theme_node_get_element_type (cur_node);
break;
default:
goto done;
}
cur_sel = cur_sel->prev;
}
/*
*if we reached this point, it means the selector matches
*the style node.
*/
*a_result = TRUE;
done:
return CR_OK;
}
static void
add_matched_properties (StTheme *a_this,
CRStyleSheet *a_nodesheet,
StThemeNode *a_node,
GPtrArray *props)
{
CRStatement *cur_stmt = NULL;
CRSelector *sel_list = NULL;
CRSelector *cur_sel = NULL;
gboolean matches = FALSE;
enum CRStatus status = CR_OK;
/*
*walk through the list of statements and,
*get the selectors list inside the statements that
*contain some, and try to match our style node in these
*selectors lists.
*/
for (cur_stmt = a_nodesheet->statements; cur_stmt; cur_stmt = cur_stmt->next)
{
/*
*initialyze the selector list in which we will
*really perform the search.
*/
sel_list = NULL;
/*
*get the the damn selector list in
*which we have to look
*/
switch (cur_stmt->type)
{
case RULESET_STMT:
if (cur_stmt->kind.ruleset && cur_stmt->kind.ruleset->sel_list)
{
sel_list = cur_stmt->kind.ruleset->sel_list;
}
break;
case AT_MEDIA_RULE_STMT:
if (cur_stmt->kind.media_rule
&& cur_stmt->kind.media_rule->rulesets
&& cur_stmt->kind.media_rule->rulesets->kind.ruleset
&& cur_stmt->kind.media_rule->rulesets->kind.ruleset->sel_list)
{
sel_list = cur_stmt->kind.media_rule->rulesets->kind.ruleset->sel_list;
}
break;
case AT_IMPORT_RULE_STMT:
{
CRAtImportRule *import_rule = cur_stmt->kind.import_rule;
if (import_rule->sheet == NULL)
{
char *filename = NULL;
if (import_rule->url->stryng && import_rule->url->stryng->str)
filename = _st_theme_resolve_url (a_this,
a_nodesheet,
import_rule->url->stryng->str);
if (filename)
import_rule->sheet = parse_stylesheet (filename);
if (import_rule->sheet)
{
insert_stylesheet (a_this, filename, import_rule->sheet);
/* refcount of stylesheets starts off at zero, so we don't need to unref! */
}
else
{
/* Set a marker to avoid repeatedly trying to parse a non-existent or
* broken stylesheet
*/
import_rule->sheet = (CRStyleSheet *) - 1;
}
if (filename)
g_free (filename);
}
if (import_rule->sheet != (CRStyleSheet *) - 1)
{
add_matched_properties (a_this, import_rule->sheet,
a_node, props);
}
}
break;
default:
break;
}
if (!sel_list)
continue;
/*
*now, we have a comma separated selector list to look in.
*let's walk it and try to match the style node
*on each item of the list.
*/
for (cur_sel = sel_list; cur_sel; cur_sel = cur_sel->next)
{
if (!cur_sel->simple_sel)
continue;
status = sel_matches_style_real (a_this, cur_sel->simple_sel, a_node, &matches, TRUE, TRUE);
if (status == CR_OK && matches)
{
CRDeclaration *cur_decl = NULL;
/* In order to sort the matching properties, we need to compute the
* specificity of the selector that actually matched this
* element. In a non-thread-safe fashion, we store it in the
* ruleset. (Fixing this would mean cut-and-pasting
* cr_simple_sel_compute_specificity(), and have no need for
* thread-safety anyways.)
*
* Once we've sorted the properties, the specificity no longer
* matters and it can be safely overriden.
*/
cr_simple_sel_compute_specificity (cur_sel->simple_sel);
cur_stmt->specificity = cur_sel->simple_sel->specificity;
for (cur_decl = cur_stmt->kind.ruleset->decl_list; cur_decl; cur_decl = cur_decl->next)
g_ptr_array_add (props, cur_decl);
}
}
}
}
#define ORIGIN_AUTHOR_IMPORTANT (ORIGIN_AUTHOR + 1)
#define ORIGIN_USER_IMPORTANT (ORIGIN_AUTHOR + 2)
static inline int
get_origin (const CRDeclaration * decl)
{
enum CRStyleOrigin origin = decl->parent_statement->parent_sheet->origin;
if (decl->important)
{
if (origin == ORIGIN_AUTHOR)
return ORIGIN_AUTHOR_IMPORTANT;
else if (origin == ORIGIN_USER)
return ORIGIN_USER_IMPORTANT;
}
return origin;
}
/* Order of comparison is so that higher priority statements compare after
* lower priority statements */
static int
compare_declarations (gconstpointer a,
gconstpointer b)
{
/* g_ptr_array_sort() is broooken */
CRDeclaration *decl_a = *(CRDeclaration **) a;
CRDeclaration *decl_b = *(CRDeclaration **) b;
int origin_a = get_origin (decl_a);
int origin_b = get_origin (decl_b);
if (origin_a != origin_b)
return origin_a - origin_b;
if (decl_a->parent_statement->specificity != decl_b->parent_statement->specificity)
return decl_a->parent_statement->specificity - decl_b->parent_statement->specificity;
return 0;
}
void
_st_theme_get_matched_properties (StTheme *theme,
StThemeNode *node,
CRDeclaration ***properties,
int *n_properties)
{
enum CRStyleOrigin origin = 0;
CRStyleSheet *sheet = NULL;
GPtrArray *props = g_ptr_array_new ();
g_return_if_fail (ST_IS_THEME (theme));
g_return_if_fail (ST_IS_THEME_NODE (node));
for (origin = ORIGIN_UA; origin < NB_ORIGINS; origin++)
{
sheet = cr_cascade_get_sheet (theme->cascade, origin);
if (!sheet)
continue;
add_matched_properties (theme, sheet, node, props);
}
/* We count on a stable sort here so that later declarations come
* after earlier declarations */
g_ptr_array_sort (props, compare_declarations);
*n_properties = props->len;
*properties = (CRDeclaration **) g_ptr_array_free (props, FALSE);
}
/* Resolve an url from an url() reference in a stylesheet into an absolute
* local filename, if possible. The resolution here is distinctly lame and
* will fail on many examples.
*/
char *
_st_theme_resolve_url (StTheme *theme,
CRStyleSheet *base_stylesheet,
const char *url)
{
const char *base_filename = NULL;
char *dirname;
char *filename;
/* Handle absolute file:/ URLs */
if (g_str_has_prefix (url, "file:") ||
g_str_has_prefix (url, "File:") ||
g_str_has_prefix (url, "FILE:"))
{
GError *error = NULL;
char *filename;
filename = g_filename_from_uri (url, NULL, &error);
if (filename == NULL)
{
g_warning ("%s", error->message);
g_error_free (error);
}
return NULL;
}
/* Guard against http:/ URLs */
if (g_str_has_prefix (url, "http:") ||
g_str_has_prefix (url, "Http:") ||
g_str_has_prefix (url, "HTTP:"))
{
g_warning ("Http URL '%s' in theme stylesheet is not supported", url);
return NULL;
}
/* Assume anything else is a relative URL, and "resolve" it
*/
if (url[0] == '/')
return g_strdup (url);
base_filename = g_hash_table_lookup (theme->filenames_by_stylesheet, base_stylesheet);
if (base_filename == NULL)
{
g_warning ("Can't get base to resolve url '%s'", url);
return NULL;
}
dirname = g_path_get_dirname (base_filename);
filename = g_build_filename (dirname, url, NULL);
g_free (dirname);
return filename;
}

38
src/st/st-theme.h Normal file
View File

@ -0,0 +1,38 @@
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
#ifndef __ST_THEME_H__
#define __ST_THEME_H__
#include <glib-object.h>
#include "st-theme-node.h"
G_BEGIN_DECLS
/**
* SECTION:StTheme
* @short_description: a set of stylesheets
*
* #StTheme holds a set of stylesheets. (The "cascade" of the name
* Cascading Stylesheets.) A #StTheme can be set to apply to all the actors
* in a stage using st_theme_context_set_theme() or applied to a subtree
* of actors using st_widget_set_theme().
*/
typedef struct _StThemeClass StThemeClass;
#define ST_TYPE_THEME (st_theme_get_type ())
#define ST_THEME(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), ST_TYPE_THEME, StTheme))
#define ST_THEME_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), ST_TYPE_THEME, StThemeClass))
#define ST_IS_THEME(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), ST_TYPE_THEME))
#define ST_IS_THEME_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), ST_TYPE_THEME))
#define ST_THEME_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), ST_TYPE_THEME, StThemeClass))
GType st_theme_get_type (void) G_GNUC_CONST;
StTheme *st_theme_new (const char *application_stylesheet,
const char *theme_stylesheet,
const char *default_stylesheet);
G_END_DECLS
#endif /* __ST_THEME_H__ */

292
src/st/test-theme.c Normal file
View File

@ -0,0 +1,292 @@
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
#include <clutter/clutter.h>
#include "st-theme.h"
#include "st-theme-context.h"
#include <math.h>
#include <string.h>
static StThemeNode *root;
static StThemeNode *group1;
static StThemeNode *text1;
static StThemeNode *text2;
static StThemeNode *group2;
static StThemeNode *text3;
static StThemeNode *text4;
static StThemeNode *group3;
static StThemeNode *cairo_texture;
static gboolean fail;
static const char *test;
static void
assert_font (StThemeNode *node,
const char *node_description,
const char *expected)
{
char *value = pango_font_description_to_string (st_theme_node_get_font (node));
if (strcmp (expected, value) != 0)
{
g_print ("%s: %s.font: expected: %s, got: %s\n",
test, node_description, expected, value);
fail = TRUE;
}
g_free (value);
}
static char *
text_decoration_to_string (StTextDecoration decoration)
{
GString *result = g_string_new (NULL);
if (decoration & ST_TEXT_DECORATION_UNDERLINE)
g_string_append(result, " underline");
if (decoration & ST_TEXT_DECORATION_OVERLINE)
g_string_append(result, " overline");
if (decoration & ST_TEXT_DECORATION_LINE_THROUGH)
g_string_append(result, " line_through");
if (decoration & ST_TEXT_DECORATION_BLINK)
g_string_append(result, " blink");
if (result->len > 0)
g_string_erase (result, 0, 1);
else
g_string_append(result, "none");
return g_string_free (result, FALSE);
}
static void
assert_text_decoration (StThemeNode *node,
const char *node_description,
StTextDecoration expected)
{
StTextDecoration value = st_theme_node_get_text_decoration (node);
if (expected != value)
{
char *es = text_decoration_to_string (expected);
char *vs = text_decoration_to_string (value);
g_print ("%s: %s.text-decoration: expected: %s, got: %s\n",
test, node_description, es, vs);
fail = TRUE;
g_free (es);
g_free (vs);
}
}
static void
assert_foreground_color (StThemeNode *node,
const char *node_description,
guint32 expected)
{
ClutterColor color;
st_theme_node_get_foreground_color (node, &color);
guint32 value = clutter_color_to_pixel (&color);
if (expected != value)
{
g_print ("%s: %s.color: expected: #%08x, got: #%08x\n",
test, node_description, expected, value);
fail = TRUE;
}
}
static void
assert_background_color (StThemeNode *node,
const char *node_description,
guint32 expected)
{
ClutterColor color;
st_theme_node_get_background_color (node, &color);
guint32 value = clutter_color_to_pixel (&color);
if (expected != value)
{
g_print ("%s: %s.background-color: expected: #%08x, got: #%08x\n",
test, node_description, expected, value);
fail = TRUE;
}
}
static void
assert_background_image (StThemeNode *node,
const char *node_description,
const char *expected)
{
const char *value = st_theme_node_get_background_image (node);
if (expected == NULL)
expected = "(null)";
if (value == NULL)
value = "(null)";
if (strcmp (expected, value) != 0)
{
g_print ("%s: %s.background-image: expected: %s, got: %s\n",
test, node_description, expected, value);
fail = TRUE;
}
}
#define LENGTH_EPSILON 0.001
static void
assert_length (const char *node_description,
const char *property_description,
double expected,
double value)
{
if (fabs (expected - value) > LENGTH_EPSILON)
{
g_print ("%s %s.%s: expected: %3f, got: %3f\n",
test, node_description, property_description, expected, value);
fail = TRUE;
}
}
static void
test_defaults (void)
{
test = "defaults";
/* font comes from context */
assert_font (root, "stage", "sans-serif 12");
/* black is the default foreground color */
assert_foreground_color (root, "stage", 0x00000ff);
}
static void
test_lengths (void)
{
test = "lengths";
/* 12pt == 16px at 96dpi */
assert_length ("group1", "padding-top", 16.,
st_theme_node_get_padding (group1, ST_SIDE_TOP));
/* 12px == 12px */
assert_length ("group1", "padding-right", 12.,
st_theme_node_get_padding (group1, ST_SIDE_RIGHT));
/* 2em == 32px (with a 12pt font) */
assert_length ("group1", "padding-bottom", 32.,
st_theme_node_get_padding (group1, ST_SIDE_BOTTOM));
/* 1in == 72pt == 96px, at 96dpi */
assert_length ("group1", "padding-left", 96.,
st_theme_node_get_padding (group1, ST_SIDE_LEFT));
}
static void
test_classes (void)
{
test = "classes";
/* .special-text class overrides size and style;
* the ClutterTexture.special-text selector doesn't match */
assert_font (text1, "text1", "sans-serif Italic 32px");
}
static void
test_type_inheritance (void)
{
test = "type_inheritance";
/* From ClutterTexture element selector */
assert_length ("cairoTexture", "padding-top", 10.,
st_theme_node_get_padding (cairo_texture, ST_SIDE_TOP));
/* From ClutterCairoTexture element selector */
assert_length ("cairoTexture", "padding-right", 20.,
st_theme_node_get_padding (cairo_texture, ST_SIDE_RIGHT));
}
static void
test_adjacent_selector (void)
{
test = "adjacent_selector";
/* #group1 > #text1 matches text1 */
assert_foreground_color (text1, "text1", 0x00ff00ff);
/* stage > #text2 doesn't match text2 */
assert_foreground_color (text2, "text2", 0x000000ff);
}
static void
test_background (void)
{
test = "background";
/* group1 has a background: shortcut property setting color and image */
assert_background_color (group1, "group1", 0xff0000ff);
assert_background_image (group1, "group1", "st/some-background.png");
/* text1 inherits the background image but not the color */
assert_background_color (text1, "text1", 0x00000000);
assert_background_image (text1, "text1", "st/some-background.png");
/* text1 inherits inherits both, but then background: none overrides both */
assert_background_color (text2, "text2", 0x00000000);
assert_background_image (text2, "text2", NULL);
/* background-image property */
assert_background_image (group2, "group2", "st/other-background.png");
}
static void
test_font (void)
{
test = "font";
/* font specified with font: */
assert_font (group2, "group2", "serif Italic 12px");
/* text3 inherits and overrides individually properties */
assert_font (text3, "text3", "serif Bold Oblique Small-Caps 24px");
}
static void
test_pseudo_class (void)
{
test = "pseudo_class";
/* text4 has :visited and :hover pseudo-classes, so should pick up both of these */
assert_foreground_color (text4, "text4", 0x888888ff);
assert_text_decoration (text4, "text4", ST_TEXT_DECORATION_UNDERLINE);
/* :hover pseudo-class matches, but class doesn't match */
assert_text_decoration (group3, "group3", 0);
}
int
main (int argc, char **argv)
{
StTheme *theme;
StThemeContext *context;
clutter_init (&argc, &argv);
theme = st_theme_new ("st/test-theme.css",
NULL, NULL);
context = st_theme_context_new ();
st_theme_context_set_theme (context, theme);
st_theme_context_set_resolution (context, 96.);
st_theme_context_set_font (context,
pango_font_description_from_string ("sans-serif 12"));
root = st_theme_context_get_root_node (context);
group1 = st_theme_node_new (context, root, NULL,
CLUTTER_TYPE_GROUP, "group1", NULL, NULL);
text1 = st_theme_node_new (context, group1, NULL,
CLUTTER_TYPE_TEXT, "text1", "special-text", NULL);
text2 = st_theme_node_new (context, group1, NULL,
CLUTTER_TYPE_TEXT, "text2", NULL, NULL);
group2 = st_theme_node_new (context, root, NULL,
CLUTTER_TYPE_GROUP, "group2", NULL, NULL);
text3 = st_theme_node_new (context, group2, NULL,
CLUTTER_TYPE_TEXT, "text3", NULL, NULL);
text4 = st_theme_node_new (context, group2, NULL,
CLUTTER_TYPE_TEXT, "text4", NULL, "visited hover");
group3 = st_theme_node_new (context, group2, NULL,
CLUTTER_TYPE_GROUP, "group3", NULL, "hover");
cairo_texture = st_theme_node_new (context, root, NULL,
CLUTTER_TYPE_CAIRO_TEXTURE, "cairoTexture", NULL, NULL);
test_defaults ();
test_lengths ();
test_classes ();
test_type_inheritance ();
test_adjacent_selector ();
test_background ();
test_font ();
test_pseudo_class ();
return fail ? 1 : 0;
}

68
src/st/test-theme.css Normal file
View File

@ -0,0 +1,68 @@
stage {
}
#group1 {
padding: 12pt;
padding-right: 12px;
padding-bottom: 2em;
padding-left: 1in;
background: #ff0000 url('some-background.png');
}
#text1 {
background-image: inherit;
}
.special-text {
font-size: 24pt;
font-style: italic;
}
ClutterTexture.special-text {
font-weight: bold;
}
#text2 {
background: inherit;
background: none; /* also overrides the color */
}
#group2 {
font: italic 12px serif;
}
#text3 {
font-variant: small-caps;
font-weight: bold;
font-style: oblique;
font-size: 200%;
}
ClutterTexture {
padding: 10px;
}
ClutterCairoTexture {
padding-right: 20px;
}
#group1 > #text1 {
color: #00ff00;
}
stage > #text2 {
color: #ff0000;
}
#group2 {
background-image: url('other-background.png');
}
ClutterText:hover {
text-decoration: underline;
}
ClutterText:visited {
color: #888888;
}