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gtk3/gtk/gtkcssprovider.c
Cosimo Cecchi f70fc49ebc docs: fix a number of typos and obsolete references
2012-07-02 10:41:11 -04:00

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/* GTK - The GIMP Toolkit
* Copyright (C) 2010 Carlos Garnacho <carlosg@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, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <string.h>
#include <stdlib.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <cairo-gobject.h>
#include "gtkcssproviderprivate.h"
#include "gtkbitmaskprivate.h"
#include "gtkcssarrayvalueprivate.h"
#include "gtkcssstylefuncsprivate.h"
#include "gtkcssparserprivate.h"
#include "gtkcsssectionprivate.h"
#include "gtkcssselectorprivate.h"
#include "gtkcssshorthandpropertyprivate.h"
#include "gtksymboliccolor.h"
#include "gtkstyleprovider.h"
#include "gtkstylecontextprivate.h"
#include "gtkstylepropertiesprivate.h"
#include "gtkstylepropertyprivate.h"
#include "gtkstyleproviderprivate.h"
#include "gtkbindings.h"
#include "gtkmarshalers.h"
#include "gtkprivate.h"
#include "gtkintl.h"
/**
* SECTION:gtkcssprovider
* @Short_description: CSS-like styling for widgets
* @Title: GtkCssProvider
* @See_also: #GtkStyleContext, #GtkStyleProvider
*
* GtkCssProvider is an object implementing the #GtkStyleProvider interface.
* It is able to parse <ulink url="http://www.w3.org/TR/CSS2">CSS</ulink>-like
* input in order to style widgets.
*
* <refsect2 id="gtkcssprovider-files">
* <title>Default files</title>
* <para>
* An application can cause GTK+ to parse a specific CSS style sheet by
* calling gtk_css_provider_load_from_file() and adding the provider with
* gtk_style_context_add_provider() or gtk_style_context_add_provider_for_screen().
* In addition, certain files will be read when GTK+ is initialized. First,
* the file <filename><envar>$XDG_CONFIG_HOME</envar>/gtk-3.0/gtk.css</filename>
* is loaded if it exists. Then, GTK+ tries to load
* <filename><envar>$HOME</envar>/.themes/<replaceable>theme-name</replaceable>/gtk-3.0/gtk.css</filename>,
* falling back to
* <filename><replaceable>datadir</replaceable>/share/themes/<replaceable>theme-name</replaceable>/gtk-3.0/gtk.css</filename>,
* where <replaceable>theme-name</replaceable> is the name of the current theme
* (see the #GtkSettings:gtk-theme-name setting) and <replaceable>datadir</replaceable>
* is the prefix configured when GTK+ was compiled, unless overridden by the
* <envar>GTK_DATA_PREFIX</envar> environment variable.
* </para>
* </refsect2>
* <refsect2 id="gtkcssprovider-stylesheets">
* <title>Style sheets</title>
* <para>
* The basic structure of the style sheets understood by this provider is
* a series of statements, which are either rule sets or '@-rules', separated
* by whitespace.
* </para>
* <para>
* A rule set consists of a selector and a declaration block, which is
* a series of declarations enclosed in curly braces ({ and }). The
* declarations are separated by semicolons (;). Multiple selectors can
* share the same declaration block, by putting all the separators in
* front of the block, separated by commas.
* </para>
* <example><title>A rule set with two selectors</title>
* <programlisting language="text">
* GtkButton, GtkEntry {
* color: &num;ff00ea;
* font: Comic Sans 12
* }
* </programlisting>
* </example>
* </refsect2>
* <refsect2 id="gtkcssprovider-selectors">
* <title>Selectors</title>
* <para>
* Selectors work very similar to the way they do in CSS, with widget class
* names taking the role of element names, and widget names taking the role
* of IDs. When used in a selector, widget names must be prefixed with a
* '&num;' character. The '*' character represents the so-called universal
* selector, which matches any widget.
* </para>
* <para>
* To express more complicated situations, selectors can be combined in
* various ways:
* <itemizedlist>
* <listitem><para>To require that a widget satisfies several conditions,
* combine several selectors into one by concatenating them. E.g.
* <literal>GtkButton&num;button1</literal> matches a GtkButton widget
* with the name button1.</para></listitem>
* <listitem><para>To only match a widget when it occurs inside some other
* widget, write the two selectors after each other, separated by whitespace.
* E.g. <literal>GtkToolBar GtkButton</literal> matches GtkButton widgets
* that occur inside a GtkToolBar.</para></listitem>
* <listitem><para>In the previous example, the GtkButton is matched even
* if it occurs deeply nested inside the toolbar. To restrict the match
* to direct children of the parent widget, insert a '>' character between
* the two selectors. E.g. <literal>GtkNotebook > GtkLabel</literal> matches
* GtkLabel widgets that are direct children of a GtkNotebook.</para></listitem>
* </itemizedlist>
* </para>
* <example>
* <title>Widget classes and names in selectors</title>
* <programlisting language="text">
* /&ast; Theme labels that are descendants of a window &ast;/
* GtkWindow GtkLabel {
* background-color: &num;898989
* }
*
* /&ast; Theme notebooks, and anything that's within these &ast;/
* GtkNotebook {
* background-color: &num;a939f0
* }
*
* /&ast; Theme combo boxes, and entries that
* are direct children of a notebook &ast;/
* GtkComboBox,
* GtkNotebook > GtkEntry {
* color: @fg_color;
* background-color: &num;1209a2
* }
*
* /&ast; Theme any widget within a GtkBin &ast;/
* GtkBin * {
* font: Sans 20
* }
*
* /&ast; Theme a label named title-label &ast;/
* GtkLabel&num;title-label {
* font: Sans 15
* }
*
* /&ast; Theme any widget named main-entry &ast;/
* &num;main-entry {
* background-color: &num;f0a810
* }
* </programlisting>
* </example>
* <para>
* Widgets may also define style classes, which can be used for matching.
* When used in a selector, style classes must be prefixed with a '.'
* character.
* </para>
* <para>
* Refer to the documentation of individual widgets to learn which
* style classes they define and see <xref linkend="gtkstylecontext-classes"/>
* for a list of all style classes used by GTK+ widgets.
* </para>
* <para>
* Note that there is some ambiguity in the selector syntax when it comes
* to differentiation widget class names from regions. GTK+ currently treats
* a string as a widget class name if it contains any uppercase characters
* (which should work for more widgets with names like GtkLabel).
* </para>
* <example>
* <title>Style classes in selectors</title>
* <programlisting language="text">
* /&ast; Theme all widgets defining the class entry &ast;/
* .entry {
* color: &num;39f1f9;
* }
*
* /&ast; Theme spinbuttons' entry &ast;/
* GtkSpinButton.entry {
* color: &num;900185
* }
* </programlisting>
* </example>
* <para>
* In complicated widgets like e.g. a GtkNotebook, it may be desirable
* to style different parts of the widget differently. To make this
* possible, container widgets may define regions, whose names
* may be used for matching in selectors.
* </para>
* <para>
* Some containers allow to further differentiate between regions by
* applying so-called pseudo-classes to the region. For example, the
* tab region in GtkNotebook allows to single out the first or last
* tab by using the :first-child or :last-child pseudo-class.
* When used in selectors, pseudo-classes must be prefixed with a
* ':' character.
* </para>
* <para>
* Refer to the documentation of individual widgets to learn which
* regions and pseudo-classes they define and see
* <xref linkend="gtkstylecontext-classes"/> for a list of all regions
* used by GTK+ widgets.
* </para>
* <example>
* <title>Regions in selectors</title>
* <programlisting language="text">
* /&ast; Theme any label within a notebook &ast;/
* GtkNotebook GtkLabel {
* color: &num;f90192;
* }
*
* /&ast; Theme labels within notebook tabs &ast;/
* GtkNotebook tab GtkLabel {
* color: &num;703910;
* }
*
* /&ast; Theme labels in the any first notebook
* tab, both selectors are equivalent &ast;/
* GtkNotebook tab:nth-child(first) GtkLabel,
* GtkNotebook tab:first-child GtkLabel {
* color: &num;89d012;
* }
* </programlisting>
* </example>
* <para>
* Another use of pseudo-classes is to match widgets depending on their
* state. This is conceptually similar to the :hover, :active or :focus
* pseudo-classes in CSS. The available pseudo-classes for widget states
* are :active, :prelight (or :hover), :insensitive, :selected, :focused
* and :inconsistent.
* </para>
* <example>
* <title>Styling specific widget states</title>
* <programlisting language="text">
* /&ast; Theme active (pressed) buttons &ast;/
* GtkButton:active {
* background-color: &num;0274d9;
* }
*
* /&ast; Theme buttons with the mouse pointer on it,
* both are equivalent &ast;/
* GtkButton:hover,
* GtkButton:prelight {
* background-color: &num;3085a9;
* }
*
* /&ast; Theme insensitive widgets, both are equivalent &ast;/
* :insensitive,
* *:insensitive {
* background-color: &num;320a91;
* }
*
* /&ast; Theme selection colors in entries &ast;/
* GtkEntry:selected {
* background-color: &num;56f9a0;
* }
*
* /&ast; Theme focused labels &ast;/
* GtkLabel:focused {
* background-color: &num;b4940f;
* }
*
* /&ast; Theme inconsistent checkbuttons &ast;/
* GtkCheckButton:inconsistent {
* background-color: &num;20395a;
* }
* </programlisting>
* </example>
* <para>
* Widget state pseudoclasses may only apply to the last element
* in a selector.
* </para>
* <para>
* To determine the effective style for a widget, all the matching rule
* sets are merged. As in CSS, rules apply by specificity, so the rules
* whose selectors more closely match a widget path will take precedence
* over the others.
* </para>
* </refsect2>
* <refsect2 id="gtkcssprovider-rules">
* <title>&commat; Rules</title>
* <para>
* GTK+'s CSS supports the &commat;import rule, in order to load another
* CSS style sheet in addition to the currently parsed one.
* </para>
* <example>
* <title>Using the &commat;import rule</title>
* <programlisting language="text">
* &commat;import url ("path/to/common.css");
* </programlisting>
* </example>
* <para id="css-binding-set">
* In order to extend key bindings affecting different widgets, GTK+
* supports the &commat;binding-set rule to parse a set of bind/unbind
* directives, see #GtkBindingSet for the supported syntax. Note that
* the binding sets defined in this way must be associated with rule sets
* by setting the gtk-key-bindings style property.
* </para>
* <para>
* Customized key bindings are typically defined in a separate
* <filename>gtk-keys.css</filename> CSS file and GTK+ loads this file
* according to the current key theme, which is defined by the
* #GtkSettings:gtk-key-theme-name setting.
* </para>
* <example>
* <title>Using the &commat;binding rule</title>
* <programlisting language="text">
* &commat;binding-set binding-set1 {
* bind "&lt;alt&gt;Left" { "move-cursor" (visual-positions, -3, 0) };
* unbind "End";
* };
*
* &commat;binding-set binding-set2 {
* bind "&lt;alt&gt;Right" { "move-cursor" (visual-positions, 3, 0) };
* bind "&lt;alt&gt;KP_space" { "delete-from-cursor" (whitespace, 1)
* "insert-at-cursor" (" ") };
* };
*
* GtkEntry {
* gtk-key-bindings: binding-set1, binding-set2;
* }
* </programlisting>
* </example>
* <para>
* GTK+ also supports an additional &commat;define-color rule, in order
* to define a color name which may be used instead of color numeric
* representations. Also see the #GtkSettings:gtk-color-scheme setting
* for a way to override the values of these named colors.
* </para>
* <example>
* <title>Defining colors</title>
* <programlisting language="text">
* &commat;define-color bg_color &num;f9a039;
*
* &ast; {
* background-color: &commat;bg_color;
* }
* </programlisting>
* </example>
* </refsect2>
* <refsect2 id="gtkcssprovider-symbolic-colors">
* <title>Symbolic colors</title>
* <para>
* Besides being able to define color names, the CSS parser is also able
* to read different color expressions, which can also be nested, providing
* a rich language to define colors which are derived from a set of base
* colors.
* </para>
* <example>
* <title>Using symbolic colors</title>
* <programlisting language="text">
* &commat;define-color entry-color shade (&commat;bg_color, 0.7);
*
* GtkEntry {
* background-color: @entry-color;
* }
*
* GtkEntry:focused {
* background-color: mix (&commat;entry-color,
* shade (&num;fff, 0.5),
* 0.8);
* }
* </programlisting>
* </example>
* <para>
* The various ways to express colors in GTK+ CSS are:
* </para>
* <informaltable>
* <tgroup cols="3">
* <thead>
* <row>
* <entry>Syntax</entry>
* <entry>Explanation</entry>
* <entry>Examples</entry>
* </row>
* </thead>
* <tbody>
* <row>
* <entry>rgb(@r, @g, @b)</entry>
* <entry>An opaque color; @r, @g, @b can be either integers between
* 0 and 255 or percentages</entry>
* <entry><literallayout>rgb(128, 10, 54)
* rgb(20%, 30%, 0%)</literallayout></entry>
* </row>
* <row>
* <entry>rgba(@r, @g, @b, @a)</entry>
* <entry>A translucent color; @r, @g, @b are as in the previous row,
* @a is a floating point number between 0 and 1</entry>
* <entry><literallayout>rgba(255, 255, 0, 0.5)</literallayout></entry>
* </row>
* <row>
* <entry>&num;@xxyyzz</entry>
* <entry>An opaque color; @xx, @yy, @zz are hexadecimal numbers
* specifying @r, @g, @b variants with between 1 and 4
* hexadecimal digits per component are allowed</entry>
* <entry><literallayout>&num;ff12ab
* &num;f0c</literallayout></entry>
* </row>
* <row>
* <entry>&commat;name</entry>
* <entry>Reference to a color that has been defined with
* &commat;define-color
* </entry>
* <entry>&commat;bg_color</entry>
* </row>
* <row>
* <entry>mix(@color1, @color2, @f)</entry>
* <entry>A linear combination of @color1 and @color2. @f is a
* floating point number between 0 and 1.</entry>
* <entry><literallayout>mix(&num;ff1e0a, &commat;bg_color, 0.8)</literallayout></entry>
* </row>
* <row>
* <entry>shade(@color, @f)</entry>
* <entry>A lighter or darker variant of @color. @f is a
* floating point number.
* </entry>
* <entry>shade(&commat;fg_color, 0.5)</entry>
* </row>
* <row>
* <entry>lighter(@color)</entry>
* <entry>A lighter variant of @color</entry>
* </row>
* <row>
* <entry>darker(@color)</entry>
* <entry>A darker variant of @color</entry>
* </row>
* <row>
* <entry>alpha(@color, @f)</entry>
* <entry>Modifies passed color's alpha by a factor @f. @f is a
* floating point number. @f < 1.0 results in a more transparent
* color while @f > 1.0 results in a more opaque color.
* </entry>
* <entry>alhpa(blue, 0.5)</entry>
* </row>
* </tbody>
* </tgroup>
* </informaltable>
* </refsect2>
* <refsect2 id="gtkcssprovider-gradients">
* <title>Gradients</title>
* <para>
* Linear or radial Gradients can be used as background images.
* </para>
* <para>
* A linear gradient along the line from (@start_x, @start_y) to
* (@end_x, @end_y) is specified using the syntax
* <literallayout>-gtk-gradient (linear,
* @start_x @start_y, @end_x @end_y,
* color-stop (@position, @color),
* ...)</literallayout>
* where @start_x and @end_x can be either a floating point number between
* 0 and 1 or one of the special values 'left', 'right' or 'center', @start_y
* and @end_y can be either a floating point number between 0 and 1 or one
* of the special values 'top', 'bottom' or 'center', @position is a floating
* point number between 0 and 1 and @color is a color expression (see above).
* The color-stop can be repeated multiple times to add more than one color
* stop. 'from (@color)' and 'to (@color)' can be used as abbreviations for
* color stops with position 0 and 1, respectively.
* </para>
* <example>
* <title>A linear gradient</title>
* <inlinegraphic fileref="gradient1.png" format="PNG"/>
* <para>This gradient was specified with
* <literallayout>-gtk-gradient (linear,
* left top, right bottom,
* from(&commat;yellow), to(&commat;blue))</literallayout></para>
* </example>
* <example>
* <title>Another linear gradient</title>
* <inlinegraphic fileref="gradient2.png" format="PNG"/>
* <para>This gradient was specified with
* <literallayout>-gtk-gradient (linear,
* 0 0, 0 1,
* color-stop(0, &commat;yellow),
* color-stop(0.2, &commat;blue),
* color-stop(1, &num;0f0))</literallayout></para>
* </example>
* <para>
* A radial gradient along the two circles defined by (@start_x, @start_y,
* @start_radius) and (@end_x, @end_y, @end_radius) is specified using the
* syntax
* <literallayout>-gtk-gradient (radial,
* @start_x @start_y, @start_radius,
* @end_x @end_y, @end_radius,
* color-stop (@position, @color),
* ...)</literallayout>
* where @start_radius and @end_radius are floating point numbers and
* the other parameters are as before.
* </para>
* <example>
* <title>A radial gradient</title>
* <inlinegraphic fileref="gradient3.png" format="PNG"/>
* <para>This gradient was specified with
* <literallayout>-gtk-gradient (radial,
* center center, 0,
* center center, 1,
* from(&commat;yellow), to(&commat;green))</literallayout></para>
* </example>
* <example>
* <title>Another radial gradient</title>
* <inlinegraphic fileref="gradient4.png" format="PNG"/>
* <para>This gradient was specified with
* <literallayout>-gtk-gradient (radial,
* 0.4 0.4, 0.1,
* 0.6 0.6, 0.7,
* color-stop (0, &num;f00),
* color-stop (0.1, &num;a0f),
* color-stop (0.2, &commat;yellow),
* color-stop (1, &commat;green))</literallayout></para>
* </example>
* </refsect2>
* <refsect2 id="gtkcssprovider-shadows">
* <title>Text shadow</title>
* <para>
* A shadow list can be applied to text or symbolic icons, using the CSS3
* text-shadow syntax, as defined in
* <ulink url="http://www.w3.org/TR/css3-text/#text-shadow">the CSS3 specification</ulink>.
* </para>
* <para>
* A text shadow is specified using the syntax
* <literallayout>text-shadow: @horizontal_offset @vertical_offset [ @blur_radius ] @color</literallayout>
* The offset of the shadow is specified with the @horizontal_offset and @vertical_offset
* parameters. The optional blur radius is parsed, but it is currently not rendered by
* the GTK+ theming engine.
* </para>
* <para>
* To set multiple shadows on an element, you can specify a comma-separated list
* of shadow elements in the text-shadow property. Shadows are always rendered
* front-back, i.e. the first shadow specified is on top of the others. Shadows
* can thus overlay each other, but they can never overlay the text itself,
* which is always rendered on top of the shadow layer.
* </para>
* </refsect2>
* <refsect2>
* <title>Box shadow</title>
* <para>
* Themes can apply shadows on framed elements using the CSS3 box-shadow syntax,
* as defined in
* <ulink url="http://www.w3.org/TR/css3-background/#the-box-shadow">the CSS3 specification</ulink>.
* </para>
* <para>
* A box shadow is specified using the syntax
* <literallayout>box-shadow: [ @inset ] @horizontal_offset @vertical_offset [ @blur_radius ] [ @spread ] @color</literallayout>
* A positive offset will draw a shadow that is offset to the right (down) of the box,
* a negative offset to the left (top). The optional spread parameter defines an additional
* distance to expand the shadow shape in all directions, by the specified radius.
* The optional blur radius parameter is parsed, but it is currently not rendered by
* the GTK+ theming engine.
* The inset parameter defines whether the drop shadow should be rendered inside or outside
* the box canvas. Only inset box-shadows are currently supported by the GTK+ theming engine,
* non-inset elements are currently ignored.
* </para>
* <para>
* To set multiple box-shadows on an element, you can specify a comma-separated list
* of shadow elements in the box-shadow property. Shadows are always rendered
* front-back, i.e. the first shadow specified is on top of the others, so they may
* overlap other boxes or other shadows.
* </para>
* </refsect2>
* <refsect2 id="gtkcssprovider-border-image">
* <title>Border images</title>
* <para>
* Images and gradients can also be used in slices for the purpose of creating
* scalable borders.
* For more information, see the CSS3 documentation for the border-image property,
* which can be found <ulink url="http://www.w3.org/TR/css3-background/#border-images">here</ulink>.
* </para>
* <inlinegraphic fileref="slices.png" format="PNG"/>
* <para>
* The parameters of the slicing process are controlled by
* four separate properties. Note that you can use the
* <literallayout>border-image</literallayout> shorthand property
* to set values for the three properties at the same time.
* </para>
* <para>
* <literallayout>border-image-source: url(@path)
* (or border-image-source: -gtk-gradient(...))</literallayout>:
* Specifies the source of the border image, and it can either
* be an URL or a gradient (see above).
* </para>
* <para>
* <literallayout>border-image-slice: @top @right @bottom @left</literallayout>
* The sizes specified by the @top, @right, @bottom and @left parameters
* are the offsets, in pixels, from the relevant edge where the image
* should be "cut off" to build the slices used for the rendering
* of the border.
* </para>
* <para>
* <literallayout>border-image-width: @top @right @bottom @left</literallayout>
* The sizes specified by the @top, @right, @bottom and @left parameters
* are inward distances from the border box edge, used to specify the
* rendered size of each slice determined by border-image-slice.
* If this property is not specified, the values of border-width will
* be used as a fallback.
* </para>
* <para>
* <literallayout>border-image-repeat: [stretch|repeat|round|space] ?
* [stretch|repeat|round|space]</literallayout>
* Specifies how the image slices should be rendered in the area
* outlined by border-width.
* The default (stretch) is to resize the slice to fill in the whole
* allocated area.
* If the value of this property is 'repeat', the image slice
* will be tiled to fill the area.
* If the value of this property is 'round', the image slice will
* be tiled to fill the area, and scaled to fit it exactly
* a whole number of times.
* If the value of this property is 'space', the image slice will
* be tiled to fill the area, and if it doesn't fit it exactly a whole
* number of times, the extra space is distributed as padding around
* the slices.
* If two options are specified, the first one affects
* the horizontal behaviour and the second one the vertical behaviour.
* If only one option is specified, it affects both.
* </para>
* <example>
* <title>A border image</title>
* <inlinegraphic fileref="border1.png" format="PNG"/>
* <para>This border image was specified with
* <literallayout>url("gradient1.png") 10 10 10 10</literallayout>
* </para>
* </example>
* <example>
* <title>A repeating border image</title>
* <inlinegraphic fileref="border2.png" format="PNG"/>
* <para>This border image was specified with
* <literallayout>url("gradient1.png") 10 10 10 10 repeat</literallayout>
* </para>
* </example>
* <example>
* <title>A stretched border image</title>
* <inlinegraphic fileref="border3.png" format="PNG"/>
* <para>This border image was specified with
* <literallayout>url("gradient1.png") 10 10 10 10 stretch</literallayout>
* </para>
* </example>
* </refsect2>
* <refsect2 id="gtkcssprovider-transitions">
* <para>Styles can specify transitions that will be used to create a gradual
* change in the appearance when a widget state changes. The following
* syntax is used to specify transitions:
* <literallayout>@duration [s|ms] [linear|ease|ease-in|ease-out|ease-in-out] [loop]?</literallayout>
* The @duration is the amount of time that the animation will take for
* a complete cycle from start to end. If the loop option is given, the
* animation will be repated until the state changes again.
* The option after the duration determines the transition function from a
* small set of predefined functions.
* <figure><title>Linear transition</title>
* <graphic fileref="linear.png" format="PNG"/>
* </figure>
* <figure><title>Ease transition</title>
* <graphic fileref="ease.png" format="PNG"/>
* </figure>
* <figure><title>Ease-in-out transition</title>
* <graphic fileref="ease-in-out.png" format="PNG"/>
* </figure>
* <figure><title>Ease-in transition</title>
* <graphic fileref="ease-in.png" format="PNG"/>
* </figure>
* <figure><title>Ease-out transition</title>
* <graphic fileref="ease-out.png" format="PNG"/>
* </figure>
* </para>
* </refsect2>
* <refsect2 id="gtkcssprovider-properties">
* <title>Supported properties</title>
* <para>
* Properties are the part that differ the most to common CSS,
* not all properties are supported (some are planned to be
* supported eventually, some others are meaningless or don't
* map intuitively in a widget based environment).
* </para>
* <para>
* The currently supported properties are:
* </para>
* <informaltable>
* <tgroup cols="4">
* <thead>
* <row>
* <entry>Property name</entry>
* <entry>Syntax</entry>
* <entry>Maps to</entry>
* <entry>Examples</entry>
* </row>
* </thead>
* <tbody>
* <row>
* <entry>engine</entry>
* <entry>engine-name</entry>
* <entry>#GtkThemingEngine</entry>
* <entry>engine: clearlooks;
* engine: none; /&ast; use the default (i.e. builtin) engine) &ast;/ </entry>
* </row>
* <row>
* <entry>background-color</entry>
* <entry morerows="2">color (see above)</entry>
* <entry morerows="7">#GdkRGBA</entry>
* <entry morerows="7"><literallayout>background-color: &num;fff;
* color: &amp;color1;
* background-color: shade (&amp;color1, 0.5);
* color: mix (&amp;color1, &num;f0f, 0.8);</literallayout>
* </entry>
* </row>
* <row>
* <entry>color</entry>
* </row>
* <row>
* <entry>border-top-color</entry>
* <entry morerows="4">transparent|color (see above)</entry>
* </row>
* <row>
* <entry>border-right-color</entry>
* </row>
* <row>
* <entry>border-bottom-color</entry>
* </row>
* <row>
* <entry>border-left-color</entry>
* </row>
* <row>
* <entry>border-color</entry>
* <entry>[transparent|color]{1,4}</entry>
* </row>
* <row>
* <entry>font-family</entry>
* <entry>@family [, @family]*</entry>
* <entry>#gchararray</entry>
* <entry>font-family: Sans, Arial;</entry>
* </row>
* <row>
* <entry>font-style</entry>
* <entry>[normal|oblique|italic]</entry>
* <entry>#PANGO_TYPE_STYLE</entry>
* <entry>font-style: italic;</entry>
* </row>
* <row>
* <entry>font-variant</entry>
* <entry>[normal|small-caps]</entry>
* <entry>#PANGO_TYPE_VARIANT</entry>
* <entry>font-variant: normal;</entry>
* </row>
* <row>
* <entry>font-weight</entry>
* <entry>[normal|bold|bolder|lighter|100|200|300|400|500|600|700|800|900]</entry>
* <entry>#PANGO_TYPE_WEIGHT</entry>
* <entry>font-weight: bold;</entry>
* </row>
* <row>
* <entry>font-size</entry>
* <entry>Font size in point</entry>
* <entry>#gint</entry>
* <entry>font-size: 13;</entry>
* </row>
* <row>
* <entry>font</entry>
* <entry>@family [@style] [@size]</entry>
* <entry>#PangoFontDescription</entry>
* <entry>font: Sans 15;</entry>
* </row>
* <row>
* <entry>margin-top</entry>
* <entry>integer</entry>
* <entry>#gint</entry>
* <entry>margin-top: 0;</entry>
* </row>
* <row>
* <entry>margin-left</entry>
* <entry>integer</entry>
* <entry>#gint</entry>
* <entry>margin-left: 1;</entry>
* </row>
* <row>
* <entry>margin-bottom</entry>
* <entry>integer</entry>
* <entry>#gint</entry>
* <entry>margin-bottom: 2;</entry>
* </row>
* <row>
* <entry>margin-right</entry>
* <entry>integer</entry>
* <entry>#gint</entry>
* <entry>margin-right: 4;</entry>
* </row>
* <row>
* <entry>margin</entry>
* <entry morerows="1"><literallayout>@width
* @vertical_width @horizontal_width
* @top_width @horizontal_width @bottom_width
* @top_width @right_width @bottom_width @left_width</literallayout>
* </entry>
* <entry morerows="1">#GtkBorder</entry>
* <entry morerows="1"><literallayout>margin: 5;
* margin: 5 10;
* margin: 5 10 3;
* margin: 5 10 3 5;</literallayout>
* </entry>
* </row>
* <row>
* <entry>padding-top</entry>
* <entry>integer</entry>
* <entry>#gint</entry>
* <entry>padding-top: 5;</entry>
* </row>
* <row>
* <entry>padding-left</entry>
* <entry>integer</entry>
* <entry>#gint</entry>
* <entry>padding-left: 5;</entry>
* </row>
* <row>
* <entry>padding-bottom</entry>
* <entry>integer</entry>
* <entry>#gint</entry>
* <entry>padding-bottom: 5;</entry>
* </row>
* <row>
* <entry>padding-right</entry>
* <entry>integer</entry>
* <entry>#gint</entry>
* <entry>padding-right: 5;</entry>
* </row>
* <row>
* <entry>padding</entry>
* </row>
* <row>
* <entry>background-image</entry>
* <entry><literallayout>gradient (see above) or
* url(@path)</literallayout></entry>
* <entry>#cairo_pattern_t</entry>
* <entry><literallayout>-gtk-gradient (linear,
* left top, right top,
* from (&num;fff), to (&num;000));
* -gtk-gradient (linear, 0.0 0.5, 0.5 1.0,
* from (&num;fff),
* color-stop (0.5, &num;f00),
* to (&num;000));
* -gtk-gradient (radial,
* center center, 0.2,
* center center, 0.8,
* color-stop (0.0, &num;fff),
* color-stop (1.0, &num;000));
* url ('background.png');</literallayout>
* </entry>
* </row>
* <row>
* <entry>background-repeat</entry>
* <entry>[repeat|no-repeat]</entry>
* <entry>internal</entry>
* <entry><literallayout>background-repeat: no-repeat;</literallayout>
* If not specified, the style doesn't respect the CSS3
* specification, since the background will be
* stretched to fill the area.
* </entry>
* </row>
* <row>
* <entry>border-top-width</entry>
* <entry>integer</entry>
* <entry>#gint</entry>
* <entry>border-top-width: 5;</entry>
* </row>
* <row>
* <entry>border-left-width</entry>
* <entry>integer</entry>
* <entry>#gint</entry>
* <entry>border-left-width: 5;</entry>
* </row>
* <row>
* <entry>border-bottom-width</entry>
* <entry>integer</entry>
* <entry>#gint</entry>
* <entry>border-bottom-width: 5;</entry>
* </row>
* <row>
* <entry>border-right-width</entry>
* <entry>integer</entry>
* <entry>#gint</entry>
* <entry>border-right-width: 5;</entry>
* </row>
* <row>
* <entry>border-width</entry>
* <entry morerows="1">#GtkBorder</entry>
* <entry morerows="1"><literallayout>border-width: 1;
* border-width: 1 2;
* border-width: 1 2 3;
* border-width: 1 2 3 5;</literallayout>
* </entry>
* </row>
* <row>
* <entry>border-radius</entry>
* <entry>integer</entry>
* <entry>#gint</entry>
* <entry>border-radius: 5;</entry>
* </row>
* <row>
* <entry>border-style</entry>
* <entry>[none|solid|inset|outset]</entry>
* <entry>#GtkBorderStyle</entry>
* <entry>border-style: solid;</entry>
* </row>
* <row>
* <entry>border-image</entry>
* <entry><literallayout>border image (see above)</literallayout></entry>
* <entry>internal use only</entry>
* <entry><literallayout>border-image: url("/path/to/image.png") 3 4 3 4 stretch;
* border-image: url("/path/to/image.png") 3 4 4 3 repeat stretch;</literallayout>
* </entry>
* </row>
* <row>
* <entry>text-shadow</entry>
* <entry>shadow list (see above)</entry>
* <entry>internal use only</entry>
* <entry><literallayout>text-shadow: 1 1 0 blue, -4 -4 red;</literallayout></entry>
* </row>
* <row>
* <entry>transition</entry>
* <entry>transition (see above)</entry>
* <entry>internal use only</entry>
* <entry><literallayout>transition: 150ms ease-in-out;
* transition: 1s linear loop;</literallayout>
* </entry>
* </row>
* <row>
* <entry>gtk-key-bindings</entry>
* <entry>binding set name list</entry>
* <entry>internal use only</entry>
* <entry><literallayout>gtk-bindings: binding1, binding2, ...;</literallayout>
* </entry>
* </row>
* </tbody>
* </tgroup>
* </informaltable>
* <para>
* GtkThemingEngines can register their own, engine-specific style properties
* with the function gtk_theming_engine_register_property(). These properties
* can be set in CSS like other properties, using a name of the form
* <literallayout>-<replaceable>namespace</replaceable>-<replaceable>name</replaceable></literallayout>, where <replaceable>namespace</replaceable> is typically
* the name of the theming engine, and <replaceable>name</replaceable> is the
* name of the property. Style properties that have been registered by widgets
* using gtk_widget_class_install_style_property() can also be set in this
* way, using the widget class name for <replaceable>namespace</replaceable>.
* </para>
* <example>
* <title>Using engine-specific style properties</title>
* <programlisting>
* * {
* engine: clearlooks;
* border-radius: 4;
* -GtkPaned-handle-size: 6;
* -clearlooks-colorize-scrollbar: false;
* }
* </programlisting>
* </example>
* </refsect2>
*/
typedef struct GtkCssRuleset GtkCssRuleset;
typedef struct _GtkCssScanner GtkCssScanner;
typedef struct _PropertyValue PropertyValue;
typedef struct _WidgetPropertyValue WidgetPropertyValue;
typedef enum ParserScope ParserScope;
typedef enum ParserSymbol ParserSymbol;
struct _PropertyValue {
GtkCssStyleProperty *property;
GtkCssValue *value;
GtkCssSection *section;
};
struct _WidgetPropertyValue {
WidgetPropertyValue *next;
char *name;
char *value;
GtkCssSection *section;
};
struct GtkCssRuleset
{
GtkCssSelector *selector;
WidgetPropertyValue *widget_style;
PropertyValue *styles;
GtkBitmask *set_styles;
guint n_styles;
guint owns_styles : 1;
guint owns_widget_style : 1;
};
struct _GtkCssScanner
{
GtkCssProvider *provider;
GtkCssParser *parser;
GtkCssSection *section;
GtkCssScanner *parent;
GSList *state;
};
struct _GtkCssProviderPrivate
{
GScanner *scanner;
GHashTable *symbolic_colors;
GArray *rulesets;
GResource *resource;
};
enum {
PARSING_ERROR,
LAST_SIGNAL
};
static gboolean gtk_keep_css_sections = FALSE;
static guint css_provider_signals[LAST_SIGNAL] = { 0 };
static void gtk_css_provider_finalize (GObject *object);
static void gtk_css_style_provider_iface_init (GtkStyleProviderIface *iface);
static void gtk_css_style_provider_private_iface_init (GtkStyleProviderPrivateInterface *iface);
static void widget_property_value_list_free (WidgetPropertyValue *head);
static gboolean
gtk_css_provider_load_internal (GtkCssProvider *css_provider,
GtkCssScanner *scanner,
GFile *file,
const char *data,
GError **error);
GQuark
gtk_css_provider_error_quark (void)
{
return g_quark_from_static_string ("gtk-css-provider-error-quark");
}
G_DEFINE_TYPE_EXTENDED (GtkCssProvider, gtk_css_provider, G_TYPE_OBJECT, 0,
G_IMPLEMENT_INTERFACE (GTK_TYPE_STYLE_PROVIDER,
gtk_css_style_provider_iface_init)
G_IMPLEMENT_INTERFACE (GTK_TYPE_STYLE_PROVIDER_PRIVATE,
gtk_css_style_provider_private_iface_init));
static void
gtk_css_provider_parsing_error (GtkCssProvider *provider,
GtkCssSection *section,
const GError *error)
{
/* Only emit a warning when we have no error handlers. This is our
* default handlers. And in this case erroneous CSS files are a bug
* and should be fixed.
* Note that these warnings can also be triggered by a broken theme
* that people installed from some weird location on the internets.
*/
if (!g_signal_has_handler_pending (provider,
css_provider_signals[PARSING_ERROR],
0,
TRUE))
{
GFileInfo *info;
GFile *file;
const char *path;
file = gtk_css_section_get_file (section);
if (file)
{
info = g_file_query_info (file, G_FILE_ATTRIBUTE_STANDARD_DISPLAY_NAME, 0, NULL, NULL);
if (info)
path = g_file_info_get_display_name (info);
else
path = "<broken file>";
}
else
{
info = NULL;
path = "<data>";
}
g_warning ("Theme parsing error: %s:%u:%u: %s",
path,
gtk_css_section_get_end_line (section) + 1,
gtk_css_section_get_end_position (section),
error->message);
if (info)
g_object_unref (info);
}
}
static void
gtk_css_provider_class_init (GtkCssProviderClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
if (g_getenv ("GTK_CSS_DEBUG"))
gtk_keep_css_sections = TRUE;
/**
* GtkCssProvider::parsing-error:
* @provider: the provider that had a parsing error
* @section: section the error happened in
* @error: The parsing error
*
* Signals that a parsing error occured. the @path, @line and @position
* describe the actual location of the error as accurately as possible.
*
* Parsing errors are never fatal, so the parsing will resume after
* the error. Errors may however cause parts of the given
* data or even all of it to not be parsed at all. So it is a useful idea
* to check that the parsing succeeds by connecting to this signal.
*
* Note that this signal may be emitted at any time as the css provider
* may opt to defer parsing parts or all of the input to a later time
* than when a loading function was called.
*/
css_provider_signals[PARSING_ERROR] =
g_signal_new (I_("parsing-error"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkCssProviderClass, parsing_error),
NULL, NULL,
_gtk_marshal_VOID__BOXED_BOXED,
G_TYPE_NONE, 2, GTK_TYPE_CSS_SECTION, G_TYPE_ERROR);
object_class->finalize = gtk_css_provider_finalize;
klass->parsing_error = gtk_css_provider_parsing_error;
g_type_class_add_private (object_class, sizeof (GtkCssProviderPrivate));
}
static void
gtk_css_ruleset_init_copy (GtkCssRuleset *new,
GtkCssRuleset *ruleset,
GtkCssSelector *selector)
{
memcpy (new, ruleset, sizeof (GtkCssRuleset));
new->selector = selector;
/* First copy takes over ownership */
if (ruleset->owns_styles)
ruleset->owns_styles = FALSE;
if (ruleset->owns_widget_style)
ruleset->owns_widget_style = FALSE;
if (new->set_styles)
new->set_styles = _gtk_bitmask_copy (new->set_styles);
}
static void
gtk_css_ruleset_clear (GtkCssRuleset *ruleset)
{
if (ruleset->owns_styles)
{
guint i;
for (i = 0; i < ruleset->n_styles; i++)
{
_gtk_css_value_unref (ruleset->styles[i].value);
ruleset->styles[i].value = NULL;
if (ruleset->styles[i].section)
gtk_css_section_unref (ruleset->styles[i].section);
}
g_free (ruleset->styles);
}
if (ruleset->set_styles)
_gtk_bitmask_free (ruleset->set_styles);
if (ruleset->owns_widget_style)
widget_property_value_list_free (ruleset->widget_style);
if (ruleset->selector)
_gtk_css_selector_free (ruleset->selector);
memset (ruleset, 0, sizeof (GtkCssRuleset));
}
static WidgetPropertyValue *
widget_property_value_new (char *name, GtkCssSection *section)
{
WidgetPropertyValue *value;
value = g_slice_new0 (WidgetPropertyValue);
value->name = name;
if (gtk_keep_css_sections)
value->section = gtk_css_section_ref (section);
return value;
}
static void
widget_property_value_free (WidgetPropertyValue *value)
{
g_free (value->value);
g_free (value->name);
if (value->section)
gtk_css_section_unref (value->section);
g_slice_free (WidgetPropertyValue, value);
}
static void
widget_property_value_list_free (WidgetPropertyValue *head)
{
WidgetPropertyValue *l, *next;
for (l = head; l != NULL; l = next)
{
next = l->next;
widget_property_value_free (l);
}
}
static WidgetPropertyValue *
widget_property_value_list_remove_name (WidgetPropertyValue *head, const char *name)
{
WidgetPropertyValue *l, **last;
last = &head;
for (l = head; l != NULL; l = l->next)
{
if (strcmp (l->name, name) == 0)
{
*last = l->next;
widget_property_value_free (l);
break;
}
last = &l->next;
}
return head;
}
static void
gtk_css_ruleset_add_style (GtkCssRuleset *ruleset,
char *name,
WidgetPropertyValue *value)
{
value->next = widget_property_value_list_remove_name (ruleset->widget_style, name);
ruleset->widget_style = value;
ruleset->owns_widget_style = TRUE;
}
static void
gtk_css_ruleset_add (GtkCssRuleset *ruleset,
GtkCssStyleProperty *property,
GtkCssValue *value,
GtkCssSection *section)
{
guint i;
g_return_if_fail (ruleset->owns_styles || ruleset->n_styles == 0);
if (ruleset->set_styles == NULL)
ruleset->set_styles = _gtk_bitmask_new ();
ruleset->set_styles = _gtk_bitmask_set (ruleset->set_styles,
_gtk_css_style_property_get_id (property),
TRUE);
ruleset->owns_styles = TRUE;
for (i = 0; i < ruleset->n_styles; i++)
{
if (ruleset->styles[i].property == property)
{
_gtk_css_value_unref (ruleset->styles[i].value);
ruleset->styles[i].value = NULL;
if (ruleset->styles[i].section)
gtk_css_section_unref (ruleset->styles[i].section);
break;
}
}
if (i == ruleset->n_styles)
{
ruleset->n_styles++;
ruleset->styles = g_realloc (ruleset->styles, ruleset->n_styles * sizeof (PropertyValue));
ruleset->styles[i].value = NULL;
ruleset->styles[i].property = property;
}
ruleset->styles[i].value = value;
if (gtk_keep_css_sections)
ruleset->styles[i].section = gtk_css_section_ref (section);
else
ruleset->styles[i].section = NULL;
}
static gboolean
gtk_css_ruleset_matches (GtkCssRuleset *ruleset,
const GtkCssMatcher *matcher)
{
return _gtk_css_selector_matches (ruleset->selector, matcher);
}
static GtkCssChange
gtk_css_ruleset_get_change (GtkCssRuleset *ruleset)
{
return _gtk_css_selector_get_change (ruleset->selector);
}
static void
gtk_css_scanner_destroy (GtkCssScanner *scanner)
{
if (scanner->section)
gtk_css_section_unref (scanner->section);
g_object_unref (scanner->provider);
_gtk_css_parser_free (scanner->parser);
g_slice_free (GtkCssScanner, scanner);
}
static void
gtk_css_provider_emit_error (GtkCssProvider *provider,
GtkCssScanner *scanner,
const GError *error)
{
g_signal_emit (provider, css_provider_signals[PARSING_ERROR], 0,
scanner != NULL ? scanner->section : NULL, error);
}
static void
gtk_css_scanner_parser_error (GtkCssParser *parser,
const GError *error,
gpointer user_data)
{
GtkCssScanner *scanner = user_data;
gtk_css_provider_emit_error (scanner->provider,
scanner,
error);
}
static GtkCssScanner *
gtk_css_scanner_new (GtkCssProvider *provider,
GtkCssScanner *parent,
GtkCssSection *section,
GFile *file,
const gchar *text)
{
GtkCssScanner *scanner;
scanner = g_slice_new0 (GtkCssScanner);
g_object_ref (provider);
scanner->provider = provider;
scanner->parent = parent;
if (section)
scanner->section = gtk_css_section_ref (section);
scanner->parser = _gtk_css_parser_new (text,
file,
gtk_css_scanner_parser_error,
scanner);
return scanner;
}
static gboolean
gtk_css_scanner_would_recurse (GtkCssScanner *scanner,
GFile *file)
{
while (scanner)
{
GFile *parser_file = _gtk_css_parser_get_file (scanner->parser);
if (parser_file && g_file_equal (parser_file, file))
return TRUE;
scanner = scanner->parent;
}
return FALSE;
}
static void
gtk_css_scanner_push_section (GtkCssScanner *scanner,
GtkCssSectionType section_type)
{
GtkCssSection *section;
section = _gtk_css_section_new (scanner->section,
section_type,
scanner->parser);
if (scanner->section)
gtk_css_section_unref (scanner->section);
scanner->section = section;
}
static void
gtk_css_scanner_pop_section (GtkCssScanner *scanner,
GtkCssSectionType check_type)
{
GtkCssSection *parent;
g_assert (gtk_css_section_get_section_type (scanner->section) == check_type);
parent = gtk_css_section_get_parent (scanner->section);
if (parent)
gtk_css_section_ref (parent);
_gtk_css_section_end (scanner->section);
gtk_css_section_unref (scanner->section);
scanner->section = parent;
}
static void
gtk_css_provider_init (GtkCssProvider *css_provider)
{
GtkCssProviderPrivate *priv;
priv = css_provider->priv = G_TYPE_INSTANCE_GET_PRIVATE (css_provider,
GTK_TYPE_CSS_PROVIDER,
GtkCssProviderPrivate);
priv->rulesets = g_array_new (FALSE, FALSE, sizeof (GtkCssRuleset));
priv->symbolic_colors = g_hash_table_new_full (g_str_hash, g_str_equal,
(GDestroyNotify) g_free,
(GDestroyNotify) gtk_symbolic_color_unref);
}
static void
css_provider_dump_symbolic_colors (GtkCssProvider *css_provider,
GtkStyleProperties *props)
{
GtkCssProviderPrivate *priv;
GHashTableIter iter;
gpointer key, value;
priv = css_provider->priv;
g_hash_table_iter_init (&iter, priv->symbolic_colors);
while (g_hash_table_iter_next (&iter, &key, &value))
{
const gchar *name;
GtkSymbolicColor *color;
name = key;
color = value;
gtk_style_properties_map_color (props, name, color);
}
}
static GtkStyleProperties *
gtk_css_provider_get_style (GtkStyleProvider *provider,
GtkWidgetPath *path)
{
GtkCssMatcher matcher;
GtkCssProvider *css_provider;
GtkCssProviderPrivate *priv;
GtkStyleProperties *props;
guint i, j;
css_provider = GTK_CSS_PROVIDER (provider);
priv = css_provider->priv;
props = gtk_style_properties_new ();
css_provider_dump_symbolic_colors (css_provider, props);
if (_gtk_css_matcher_init (&matcher, path, 0))
{
for (i = 0; i < priv->rulesets->len; i++)
{
GtkCssRuleset *ruleset;
ruleset = &g_array_index (priv->rulesets, GtkCssRuleset, i);
if (ruleset->styles == NULL)
continue;
if (!gtk_css_ruleset_matches (ruleset, &matcher))
continue;
for (j = 0; j < ruleset->n_styles; j++)
_gtk_style_properties_set_property_by_property (props,
GTK_CSS_STYLE_PROPERTY (ruleset->styles[i].property),
_gtk_css_selector_get_state_flags (ruleset->selector),
ruleset->styles[i].value);
}
}
return props;
}
static gboolean
gtk_css_provider_get_style_property (GtkStyleProvider *provider,
GtkWidgetPath *path,
GtkStateFlags state,
GParamSpec *pspec,
GValue *value)
{
GtkCssProvider *css_provider = GTK_CSS_PROVIDER (provider);
GtkCssProviderPrivate *priv = css_provider->priv;
WidgetPropertyValue *val;
GtkCssMatcher matcher;
gboolean found = FALSE;
gchar *prop_name;
gint i;
if (!_gtk_css_matcher_init (&matcher, path, state))
return FALSE;
prop_name = g_strdup_printf ("-%s-%s",
g_type_name (pspec->owner_type),
pspec->name);
for (i = priv->rulesets->len - 1; i >= 0; i--)
{
GtkCssRuleset *ruleset;
ruleset = &g_array_index (priv->rulesets, GtkCssRuleset, i);
if (ruleset->widget_style == NULL)
continue;
if (!gtk_css_ruleset_matches (ruleset, &matcher))
continue;
for (val = ruleset->widget_style; val != NULL; val = val->next)
{
if (strcmp (val->name, prop_name) == 0)
{
GtkCssScanner *scanner;
scanner = gtk_css_scanner_new (css_provider,
NULL,
val->section,
val->section != NULL ? gtk_css_section_get_file (val->section) : NULL,
val->value);
found = _gtk_css_style_parse_value (value,
scanner->parser);
gtk_css_scanner_destroy (scanner);
break;
}
}
if (found)
break;
}
g_free (prop_name);
return found;
}
static void
gtk_css_style_provider_iface_init (GtkStyleProviderIface *iface)
{
iface->get_style = gtk_css_provider_get_style;
iface->get_style_property = gtk_css_provider_get_style_property;
}
static GtkSymbolicColor *
gtk_css_style_provider_get_color (GtkStyleProviderPrivate *provider,
const char *name)
{
GtkCssProvider *css_provider = GTK_CSS_PROVIDER (provider);
return g_hash_table_lookup (css_provider->priv->symbolic_colors, name);
}
static void
gtk_css_style_provider_lookup (GtkStyleProviderPrivate *provider,
const GtkCssMatcher *matcher,
GtkCssLookup *lookup)
{
GtkCssProvider *css_provider;
GtkCssProviderPrivate *priv;
int i;
guint j;
css_provider = GTK_CSS_PROVIDER (provider);
priv = css_provider->priv;
for (i = priv->rulesets->len - 1; i >= 0; i--)
{
GtkCssRuleset *ruleset;
ruleset = &g_array_index (priv->rulesets, GtkCssRuleset, i);
if (ruleset->styles == NULL)
continue;
if (!_gtk_bitmask_intersects (_gtk_css_lookup_get_missing (lookup),
ruleset->set_styles))
continue;
if (!gtk_css_ruleset_matches (ruleset, matcher))
continue;
for (j = 0; j < ruleset->n_styles; j++)
{
GtkCssStyleProperty *prop = ruleset->styles[j].property;
guint id = _gtk_css_style_property_get_id (prop);
if (!_gtk_css_lookup_is_missing (lookup, id))
continue;
_gtk_css_lookup_set (lookup,
id,
ruleset->styles[j].section,
ruleset->styles[j].value);
}
}
}
static GtkCssChange
gtk_css_style_provider_get_change (GtkStyleProviderPrivate *provider,
const GtkCssMatcher *matcher)
{
GtkCssProvider *css_provider;
GtkCssProviderPrivate *priv;
GtkCssChange change = 0;
int i;
css_provider = GTK_CSS_PROVIDER (provider);
priv = css_provider->priv;
for (i = priv->rulesets->len - 1; i >= 0; i--)
{
GtkCssRuleset *ruleset;
ruleset = &g_array_index (priv->rulesets, GtkCssRuleset, i);
if (ruleset->styles == NULL)
continue;
if (!gtk_css_ruleset_matches (ruleset, matcher))
continue;
change |= gtk_css_ruleset_get_change (ruleset);
}
return change;
}
static void
gtk_css_style_provider_private_iface_init (GtkStyleProviderPrivateInterface *iface)
{
iface->get_color = gtk_css_style_provider_get_color;
iface->lookup = gtk_css_style_provider_lookup;
iface->get_change = gtk_css_style_provider_get_change;
}
static void
gtk_css_provider_finalize (GObject *object)
{
GtkCssProvider *css_provider;
GtkCssProviderPrivate *priv;
guint i;
css_provider = GTK_CSS_PROVIDER (object);
priv = css_provider->priv;
for (i = 0; i < priv->rulesets->len; i++)
gtk_css_ruleset_clear (&g_array_index (priv->rulesets, GtkCssRuleset, i));
g_array_free (priv->rulesets, TRUE);
if (priv->symbolic_colors)
g_hash_table_destroy (priv->symbolic_colors);
if (priv->resource)
{
g_resources_unregister (priv->resource);
g_resource_unref (priv->resource);
priv->resource = NULL;
}
G_OBJECT_CLASS (gtk_css_provider_parent_class)->finalize (object);
}
/**
* gtk_css_provider_new:
*
* Returns a newly created #GtkCssProvider.
*
* Returns: A new #GtkCssProvider
**/
GtkCssProvider *
gtk_css_provider_new (void)
{
return g_object_new (GTK_TYPE_CSS_PROVIDER, NULL);
}
static void
gtk_css_provider_take_error (GtkCssProvider *provider,
GtkCssScanner *scanner,
GError *error)
{
gtk_css_provider_emit_error (provider,
scanner,
error);
g_error_free (error);
}
static void
gtk_css_provider_error_literal (GtkCssProvider *provider,
GtkCssScanner *scanner,
GQuark domain,
gint code,
const char *message)
{
gtk_css_provider_take_error (provider,
scanner,
g_error_new_literal (domain, code, message));
}
static void
gtk_css_provider_error (GtkCssProvider *provider,
GtkCssScanner *scanner,
GQuark domain,
gint code,
const char *format,
...) G_GNUC_PRINTF (5, 6);
static void
gtk_css_provider_error (GtkCssProvider *provider,
GtkCssScanner *scanner,
GQuark domain,
gint code,
const char *format,
...)
{
GError *error;
va_list args;
va_start (args, format);
error = g_error_new_valist (domain, code, format, args);
va_end (args);
gtk_css_provider_take_error (provider, scanner, error);
}
static void
gtk_css_provider_invalid_token (GtkCssProvider *provider,
GtkCssScanner *scanner,
const char *expected)
{
gtk_css_provider_error (provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"expected a valid %s", expected);
}
static void
css_provider_commit (GtkCssProvider *css_provider,
GSList *selectors,
GtkCssRuleset *ruleset)
{
GtkCssProviderPrivate *priv;
GSList *l;
priv = css_provider->priv;
if (ruleset->styles == NULL && ruleset->widget_style == NULL)
{
g_slist_free_full (selectors, (GDestroyNotify) _gtk_css_selector_free);
return;
}
for (l = selectors; l; l = l->next)
{
GtkCssRuleset new;
gtk_css_ruleset_init_copy (&new, ruleset, l->data);
g_array_append_val (priv->rulesets, new);
}
g_slist_free (selectors);
}
static void
gtk_css_provider_reset (GtkCssProvider *css_provider)
{
GtkCssProviderPrivate *priv;
guint i;
priv = css_provider->priv;
if (priv->resource)
{
g_resources_unregister (priv->resource);
g_resource_unref (priv->resource);
priv->resource = NULL;
}
g_hash_table_remove_all (priv->symbolic_colors);
for (i = 0; i < priv->rulesets->len; i++)
gtk_css_ruleset_clear (&g_array_index (priv->rulesets, GtkCssRuleset, i));
g_array_set_size (priv->rulesets, 0);
}
static void
gtk_css_provider_propagate_error (GtkCssProvider *provider,
GtkCssSection *section,
const GError *error,
GError **propagate_to)
{
GFileInfo *info;
GFile *file;
const char *path;
file = gtk_css_section_get_file (section);
if (file)
{
info = g_file_query_info (file,G_FILE_ATTRIBUTE_STANDARD_DISPLAY_NAME, 0, NULL, NULL);
if (info)
path = g_file_info_get_display_name (info);
else
path = "<broken file>";
}
else
{
info = NULL;
path = "<unknown>";
}
/* don't fail for deprecations */
if (g_error_matches (error, GTK_CSS_PROVIDER_ERROR, GTK_CSS_PROVIDER_ERROR_DEPRECATED))
{
g_warning ("Theme parsing error: %s:%u:%u: %s", path,
gtk_css_section_get_end_line (section) + 1,
gtk_css_section_get_end_position (section), error->message);
return;
}
/* we already set an error. And we'd like to keep the first one */
if (*propagate_to)
return;
*propagate_to = g_error_copy (error);
g_prefix_error (propagate_to, "%s:%u:%u: ", path,
gtk_css_section_get_end_line (section) + 1,
gtk_css_section_get_end_position (section));
if (info)
g_object_unref (info);
}
static gboolean
parse_import (GtkCssScanner *scanner)
{
GFile *file;
gtk_css_scanner_push_section (scanner, GTK_CSS_SECTION_IMPORT);
if (!_gtk_css_parser_try (scanner->parser, "@import", TRUE))
{
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_IMPORT);
return FALSE;
}
if (_gtk_css_parser_is_string (scanner->parser))
{
char *uri;
uri = _gtk_css_parser_read_string (scanner->parser);
file = _gtk_css_parser_get_file_for_path (scanner->parser, uri);
g_free (uri);
}
else
{
file = _gtk_css_parser_read_url (scanner->parser);
}
if (file == NULL)
{
_gtk_css_parser_resync (scanner->parser, TRUE, 0);
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_IMPORT);
return TRUE;
}
if (!_gtk_css_parser_try (scanner->parser, ";", FALSE))
{
gtk_css_provider_invalid_token (scanner->provider, scanner, "semicolon");
_gtk_css_parser_resync (scanner->parser, TRUE, 0);
}
else if (gtk_css_scanner_would_recurse (scanner, file))
{
char *path = g_file_get_path (file);
gtk_css_provider_error (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_IMPORT,
"Loading '%s' would recurse",
path);
g_free (path);
}
else
{
gtk_css_provider_load_internal (scanner->provider,
scanner,
file,
NULL,
NULL);
}
g_object_unref (file);
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_IMPORT);
_gtk_css_parser_skip_whitespace (scanner->parser);
return TRUE;
}
static gboolean
parse_color_definition (GtkCssScanner *scanner)
{
GtkCssValue *symbolic;
char *name;
gtk_css_scanner_push_section (scanner, GTK_CSS_SECTION_COLOR_DEFINITION);
if (!_gtk_css_parser_try (scanner->parser, "@define-color", TRUE))
{
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_COLOR_DEFINITION);
return FALSE;
}
name = _gtk_css_parser_try_name (scanner->parser, TRUE);
if (name == NULL)
{
gtk_css_provider_error_literal (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"Not a valid color name");
_gtk_css_parser_resync (scanner->parser, TRUE, 0);
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_COLOR_DEFINITION);
return TRUE;
}
symbolic = _gtk_css_symbolic_value_new (scanner->parser);
if (symbolic == NULL)
{
g_free (name);
_gtk_css_parser_resync (scanner->parser, TRUE, 0);
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_COLOR_DEFINITION);
return TRUE;
}
if (!_gtk_css_parser_try (scanner->parser, ";", TRUE))
{
g_free (name);
_gtk_css_value_unref (symbolic);
gtk_css_provider_error_literal (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"Missing semicolon at end of color definition");
_gtk_css_parser_resync (scanner->parser, TRUE, 0);
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_COLOR_DEFINITION);
return TRUE;
}
g_hash_table_insert (scanner->provider->priv->symbolic_colors, name, symbolic);
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_COLOR_DEFINITION);
return TRUE;
}
static gboolean
parse_binding_set (GtkCssScanner *scanner)
{
GtkBindingSet *binding_set;
char *name;
gtk_css_scanner_push_section (scanner, GTK_CSS_SECTION_BINDING_SET);
if (!_gtk_css_parser_try (scanner->parser, "@binding-set", TRUE))
{
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_BINDING_SET);
return FALSE;
}
name = _gtk_css_parser_try_ident (scanner->parser, TRUE);
if (name == NULL)
{
gtk_css_provider_error_literal (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"Expected name for binding set");
_gtk_css_parser_resync (scanner->parser, TRUE, 0);
goto skip_semicolon;
}
binding_set = gtk_binding_set_find (name);
if (!binding_set)
{
binding_set = gtk_binding_set_new (name);
binding_set->parsed = TRUE;
}
g_free (name);
if (!_gtk_css_parser_try (scanner->parser, "{", TRUE))
{
gtk_css_provider_error_literal (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"Expected '{' for binding set");
_gtk_css_parser_resync (scanner->parser, TRUE, 0);
goto skip_semicolon;
}
while (!_gtk_css_parser_is_eof (scanner->parser) &&
!_gtk_css_parser_begins_with (scanner->parser, '}'))
{
name = _gtk_css_parser_read_value (scanner->parser);
if (name == NULL)
{
_gtk_css_parser_resync (scanner->parser, TRUE, '}');
continue;
}
if (gtk_binding_entry_add_signal_from_string (binding_set, name) != G_TOKEN_NONE)
{
gtk_css_provider_error_literal (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"Failed to parse binding set.");
}
g_free (name);
if (!_gtk_css_parser_try (scanner->parser, ";", TRUE))
{
if (!_gtk_css_parser_begins_with (scanner->parser, '}') &&
!_gtk_css_parser_is_eof (scanner->parser))
{
gtk_css_provider_error_literal (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"Expected semicolon");
_gtk_css_parser_resync (scanner->parser, TRUE, '}');
}
}
}
if (!_gtk_css_parser_try (scanner->parser, "}", TRUE))
{
gtk_css_provider_error_literal (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"expected '}' after declarations");
if (!_gtk_css_parser_is_eof (scanner->parser))
_gtk_css_parser_resync (scanner->parser, FALSE, 0);
}
skip_semicolon:
if (_gtk_css_parser_begins_with (scanner->parser, ';'))
{
gtk_css_provider_error_literal (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_DEPRECATED,
"Nonstandard semicolon at end of binding set");
_gtk_css_parser_try (scanner->parser, ";", TRUE);
}
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_BINDING_SET);
return TRUE;
}
static void
parse_at_keyword (GtkCssScanner *scanner)
{
if (parse_import (scanner))
return;
if (parse_color_definition (scanner))
return;
if (parse_binding_set (scanner))
return;
else
{
gtk_css_provider_error_literal (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"unknown @ rule");
_gtk_css_parser_resync (scanner->parser, TRUE, 0);
}
}
static GSList *
parse_selector_list (GtkCssScanner *scanner)
{
GSList *selectors = NULL;
gtk_css_scanner_push_section (scanner, GTK_CSS_SECTION_SELECTOR);
do {
GtkCssSelector *select = _gtk_css_selector_parse (scanner->parser);
if (select == NULL)
{
g_slist_free_full (selectors, (GDestroyNotify) _gtk_css_selector_free);
_gtk_css_parser_resync (scanner->parser, FALSE, 0);
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_SELECTOR);
return NULL;
}
selectors = g_slist_prepend (selectors, select);
}
while (_gtk_css_parser_try (scanner->parser, ",", TRUE));
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_SELECTOR);
return selectors;
}
static void
parse_declaration (GtkCssScanner *scanner,
GtkCssRuleset *ruleset)
{
GtkStyleProperty *property;
char *name;
gtk_css_scanner_push_section (scanner, GTK_CSS_SECTION_DECLARATION);
name = _gtk_css_parser_try_ident (scanner->parser, TRUE);
if (name == NULL)
goto check_for_semicolon;
property = _gtk_style_property_lookup (name);
if (property == NULL && name[0] != '-')
{
gtk_css_provider_error (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_NAME,
"'%s' is not a valid property name",
name);
_gtk_css_parser_resync (scanner->parser, TRUE, '}');
g_free (name);
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_DECLARATION);
return;
}
if (!_gtk_css_parser_try (scanner->parser, ":", TRUE))
{
gtk_css_provider_invalid_token (scanner->provider, scanner, "':'");
_gtk_css_parser_resync (scanner->parser, TRUE, '}');
g_free (name);
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_DECLARATION);
return;
}
if (property)
{
GtkCssValue *value;
g_free (name);
gtk_css_scanner_push_section (scanner, GTK_CSS_SECTION_VALUE);
value = _gtk_style_property_parse_value (property,
scanner->parser);
if (value == NULL)
{
_gtk_css_parser_resync (scanner->parser, TRUE, '}');
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_VALUE);
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_DECLARATION);
return;
}
if (!_gtk_css_parser_begins_with (scanner->parser, ';') &&
!_gtk_css_parser_begins_with (scanner->parser, '}') &&
!_gtk_css_parser_is_eof (scanner->parser))
{
gtk_css_provider_error_literal (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"Junk at end of value");
_gtk_css_parser_resync (scanner->parser, TRUE, '}');
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_VALUE);
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_DECLARATION);
return;
}
if (GTK_IS_CSS_SHORTHAND_PROPERTY (property))
{
GtkCssShorthandProperty *shorthand = GTK_CSS_SHORTHAND_PROPERTY (property);
guint i;
for (i = 0; i < _gtk_css_shorthand_property_get_n_subproperties (shorthand); i++)
{
GtkCssStyleProperty *child = _gtk_css_shorthand_property_get_subproperty (shorthand, i);
GtkCssValue *sub = _gtk_css_array_value_get_nth (value, i);
gtk_css_ruleset_add (ruleset, child, _gtk_css_value_ref (sub), scanner->section);
}
_gtk_css_value_unref (value);
}
else if (GTK_IS_CSS_STYLE_PROPERTY (property))
{
gtk_css_ruleset_add (ruleset, GTK_CSS_STYLE_PROPERTY (property), value, scanner->section);
}
else
{
g_assert_not_reached ();
_gtk_css_value_unref (value);
}
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_VALUE);
}
else if (name[0] == '-')
{
char *value_str;
gtk_css_scanner_push_section (scanner, GTK_CSS_SECTION_VALUE);
value_str = _gtk_css_parser_read_value (scanner->parser);
if (value_str)
{
WidgetPropertyValue *val;
val = widget_property_value_new (name, scanner->section);
val->value = value_str;
gtk_css_ruleset_add_style (ruleset, name, val);
}
else
{
_gtk_css_parser_resync (scanner->parser, TRUE, '}');
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_VALUE);
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_DECLARATION);
return;
}
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_VALUE);
}
else
g_free (name);
check_for_semicolon:
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_DECLARATION);
if (!_gtk_css_parser_try (scanner->parser, ";", TRUE))
{
if (!_gtk_css_parser_begins_with (scanner->parser, '}') &&
!_gtk_css_parser_is_eof (scanner->parser))
{
gtk_css_provider_error_literal (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"Expected semicolon");
_gtk_css_parser_resync (scanner->parser, TRUE, '}');
}
}
}
static void
parse_declarations (GtkCssScanner *scanner,
GtkCssRuleset *ruleset)
{
while (!_gtk_css_parser_is_eof (scanner->parser) &&
!_gtk_css_parser_begins_with (scanner->parser, '}'))
{
parse_declaration (scanner, ruleset);
}
}
static void
parse_ruleset (GtkCssScanner *scanner)
{
GSList *selectors;
GtkCssRuleset ruleset = { 0, };
gtk_css_scanner_push_section (scanner, GTK_CSS_SECTION_RULESET);
selectors = parse_selector_list (scanner);
if (selectors == NULL)
{
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_RULESET);
return;
}
if (!_gtk_css_parser_try (scanner->parser, "{", TRUE))
{
gtk_css_provider_error_literal (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"expected '{' after selectors");
_gtk_css_parser_resync (scanner->parser, FALSE, 0);
g_slist_free_full (selectors, (GDestroyNotify) _gtk_css_selector_free);
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_RULESET);
return;
}
parse_declarations (scanner, &ruleset);
if (!_gtk_css_parser_try (scanner->parser, "}", TRUE))
{
gtk_css_provider_error_literal (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"expected '}' after declarations");
if (!_gtk_css_parser_is_eof (scanner->parser))
{
_gtk_css_parser_resync (scanner->parser, FALSE, 0);
g_slist_free_full (selectors, (GDestroyNotify) _gtk_css_selector_free);
gtk_css_ruleset_clear (&ruleset);
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_RULESET);
}
}
css_provider_commit (scanner->provider, selectors, &ruleset);
gtk_css_ruleset_clear (&ruleset);
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_RULESET);
}
static void
parse_statement (GtkCssScanner *scanner)
{
if (_gtk_css_parser_begins_with (scanner->parser, '@'))
parse_at_keyword (scanner);
else
parse_ruleset (scanner);
}
static void
parse_stylesheet (GtkCssScanner *scanner)
{
gtk_css_scanner_push_section (scanner, GTK_CSS_SECTION_DOCUMENT);
_gtk_css_parser_skip_whitespace (scanner->parser);
while (!_gtk_css_parser_is_eof (scanner->parser))
{
if (_gtk_css_parser_try (scanner->parser, "<!--", TRUE) ||
_gtk_css_parser_try (scanner->parser, "-->", TRUE))
continue;
parse_statement (scanner);
}
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_DOCUMENT);
}
static int
gtk_css_provider_compare_rule (gconstpointer a_,
gconstpointer b_)
{
const GtkCssRuleset *a = (const GtkCssRuleset *) a_;
const GtkCssRuleset *b = (const GtkCssRuleset *) b_;
int compare;
compare = _gtk_css_selector_compare (a->selector, b->selector);
if (compare != 0)
return compare;
return 0;
}
static void
gtk_css_provider_postprocess (GtkCssProvider *css_provider)
{
GtkCssProviderPrivate *priv = css_provider->priv;
g_array_sort (priv->rulesets, gtk_css_provider_compare_rule);
}
static gboolean
gtk_css_provider_load_internal (GtkCssProvider *css_provider,
GtkCssScanner *parent,
GFile *file,
const char *text,
GError **error)
{
GtkCssScanner *scanner;
gulong error_handler;
char *free_data = NULL;
if (error)
error_handler = g_signal_connect (css_provider,
"parsing-error",
G_CALLBACK (gtk_css_provider_propagate_error),
error);
else
error_handler = 0; /* silence gcc */
if (text == NULL)
{
GError *load_error = NULL;
if (g_file_load_contents (file, NULL,
&free_data, NULL,
NULL, &load_error))
{
text = free_data;
}
else
{
GtkCssSection *section;
if (parent)
section = gtk_css_section_ref (parent->section);
else
section = _gtk_css_section_new_for_file (GTK_CSS_SECTION_DOCUMENT, file);
gtk_css_provider_error (css_provider,
parent,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_IMPORT,
"Failed to import: %s",
load_error->message);
gtk_css_section_unref (section);
}
}
if (text)
{
scanner = gtk_css_scanner_new (css_provider,
parent,
parent ? parent->section : NULL,
file,
text);
parse_stylesheet (scanner);
gtk_css_scanner_destroy (scanner);
if (parent == NULL)
gtk_css_provider_postprocess (css_provider);
}
g_free (free_data);
if (error)
{
g_signal_handler_disconnect (css_provider, error_handler);
if (*error)
{
/* We clear all contents from the provider for backwards compat reasons */
gtk_css_provider_reset (css_provider);
return FALSE;
}
}
return TRUE;
}
/**
* gtk_css_provider_load_from_data:
* @css_provider: a #GtkCssProvider
* @data: (array length=length) (element-type guint8): CSS data loaded in memory
* @length: the length of @data in bytes, or -1 for NUL terminated strings. If
* @length is not -1, the code will assume it is not NUL terminated and will
* potentially do a copy.
* @error: (out) (allow-none): return location for a #GError, or %NULL
*
* Loads @data into @css_provider, making it clear any previously loaded
* information.
*
* Returns: %TRUE if the data could be loaded.
**/
gboolean
gtk_css_provider_load_from_data (GtkCssProvider *css_provider,
const gchar *data,
gssize length,
GError **error)
{
char *free_data;
gboolean ret;
g_return_val_if_fail (GTK_IS_CSS_PROVIDER (css_provider), FALSE);
g_return_val_if_fail (data != NULL, FALSE);
if (length < 0)
{
length = strlen (data);
free_data = NULL;
}
else
{
free_data = g_strndup (data, length);
data = free_data;
}
gtk_css_provider_reset (css_provider);
ret = gtk_css_provider_load_internal (css_provider, NULL, NULL, data, error);
g_free (free_data);
_gtk_style_provider_private_changed (GTK_STYLE_PROVIDER_PRIVATE (css_provider));
return ret;
}
/**
* gtk_css_provider_load_from_file:
* @css_provider: a #GtkCssProvider
* @file: #GFile pointing to a file to load
* @error: (out) (allow-none): return location for a #GError, or %NULL
*
* Loads the data contained in @file into @css_provider, making it
* clear any previously loaded information.
*
* Returns: %TRUE if the data could be loaded.
**/
gboolean
gtk_css_provider_load_from_file (GtkCssProvider *css_provider,
GFile *file,
GError **error)
{
gboolean success;
g_return_val_if_fail (GTK_IS_CSS_PROVIDER (css_provider), FALSE);
g_return_val_if_fail (G_IS_FILE (file), FALSE);
gtk_css_provider_reset (css_provider);
success = gtk_css_provider_load_internal (css_provider, NULL, file, NULL, error);
_gtk_style_provider_private_changed (GTK_STYLE_PROVIDER_PRIVATE (css_provider));
return success;
}
/**
* gtk_css_provider_load_from_path:
* @css_provider: a #GtkCssProvider
* @path: the path of a filename to load, in the GLib filename encoding
* @error: (out) (allow-none): return location for a #GError, or %NULL
*
* Loads the data contained in @path into @css_provider, making it clear
* any previously loaded information.
*
* Returns: %TRUE if the data could be loaded.
**/
gboolean
gtk_css_provider_load_from_path (GtkCssProvider *css_provider,
const gchar *path,
GError **error)
{
GFile *file;
gboolean result;
g_return_val_if_fail (GTK_IS_CSS_PROVIDER (css_provider), FALSE);
g_return_val_if_fail (path != NULL, FALSE);
file = g_file_new_for_path (path);
result = gtk_css_provider_load_from_file (css_provider, file, error);
g_object_unref (file);
return result;
}
static gboolean
_gtk_css_provider_load_from_resource (GtkCssProvider *css_provider,
const gchar *resource_path)
{
GFile *file;
char *uri, *escaped;
gboolean result;
g_return_val_if_fail (GTK_IS_CSS_PROVIDER (css_provider), FALSE);
g_return_val_if_fail (resource_path != NULL, FALSE);
escaped = g_uri_escape_string (resource_path,
G_URI_RESERVED_CHARS_ALLOWED_IN_PATH, FALSE);
uri = g_strconcat ("resource://", escaped, NULL);
g_free (escaped);
file = g_file_new_for_uri (uri);
g_free (uri);
result = gtk_css_provider_load_from_file (css_provider, file, NULL);
g_object_unref (file);
return result;
}
/**
* gtk_css_provider_get_default:
*
* Returns the provider containing the style settings used as a
* fallback for all widgets.
*
* Returns: (transfer none): The provider used for fallback styling.
* This memory is owned by GTK+, and you must not free it.
**/
GtkCssProvider *
gtk_css_provider_get_default (void)
{
static GtkCssProvider *provider;
if (G_UNLIKELY (!provider))
{
provider = gtk_css_provider_new ();
}
return provider;
}
gchar *
_gtk_css_provider_get_theme_dir (void)
{
const gchar *var;
gchar *path;
var = g_getenv ("GTK_DATA_PREFIX");
if (var)
path = g_build_filename (var, "share", "themes", NULL);
else
path = g_build_filename (_gtk_get_data_prefix (), "share", "themes", NULL);
return path;
}
/**
* gtk_css_provider_get_named:
* @name: A theme name
* @variant: (allow-none): variant to load, for example, "dark", or
* %NULL for the default
*
* Loads a theme from the usual theme paths
*
* Returns: (transfer none): a #GtkCssProvider with the theme loaded.
* This memory is owned by GTK+, and you must not free it.
*/
GtkCssProvider *
gtk_css_provider_get_named (const gchar *name,
const gchar *variant)
{
static GHashTable *themes = NULL;
GtkCssProvider *provider;
gchar *key;
if (variant == NULL)
key = (gchar *)name;
else
key = g_strconcat (name, "-", variant, NULL);
if (G_UNLIKELY (!themes))
themes = g_hash_table_new (g_str_hash, g_str_equal);
provider = g_hash_table_lookup (themes, key);
if (!provider)
{
gchar *resource_path = NULL;
if (variant)
resource_path = g_strdup_printf ("/org/gtk/libgtk/%s-%s.css", name, variant);
else
resource_path = g_strdup_printf ("/org/gtk/libgtk/%s.css", name);
if (g_resources_get_info (resource_path, 0, NULL, NULL, NULL))
{
provider = gtk_css_provider_new ();
if (!_gtk_css_provider_load_from_resource (provider, resource_path))
{
g_object_unref (provider);
provider = NULL;
}
}
g_free (resource_path);
}
if (!provider)
{
gchar *subpath, *path = NULL;
if (variant)
subpath = g_strdup_printf ("gtk-3.0" G_DIR_SEPARATOR_S "gtk-%s.css", variant);
else
subpath = g_strdup ("gtk-3.0" G_DIR_SEPARATOR_S "gtk.css");
/* First look in the user's config directory
*/
path = g_build_filename (g_get_user_data_dir (), "themes", name, subpath, NULL);
if (!g_file_test (path, G_FILE_TEST_EXISTS))
{
g_free (path);
path = NULL;
}
/* Next look in the user's home directory
*/
if (!path)
{
const gchar *home_dir;
home_dir = g_get_home_dir ();
if (home_dir)
{
path = g_build_filename (home_dir, ".themes", name, subpath, NULL);
if (!g_file_test (path, G_FILE_TEST_EXISTS))
{
g_free (path);
path = NULL;
}
}
}
if (!path)
{
gchar *theme_dir;
theme_dir = _gtk_css_provider_get_theme_dir ();
path = g_build_filename (theme_dir, name, subpath, NULL);
g_free (theme_dir);
if (!g_file_test (path, G_FILE_TEST_EXISTS))
{
g_free (path);
path = NULL;
}
}
g_free (subpath);
if (path)
{
char *dir, *resource_file;
GResource *resource;
provider = gtk_css_provider_new ();
dir = g_path_get_dirname (path);
resource_file = g_build_filename (dir, "gtk.gresource", NULL);
resource = g_resource_load (resource_file, NULL);
g_free (resource_file);
if (resource != NULL)
g_resources_register (resource);
if (!gtk_css_provider_load_from_path (provider, path, NULL))
{
if (resource != NULL)
{
g_resources_unregister (resource);
g_resource_unref (resource);
}
g_object_unref (provider);
provider = NULL;
}
else
{
/* Only set this after load success, as load_from_path will clear it */
provider->priv->resource = resource;
g_hash_table_insert (themes, g_strdup (key), provider);
}
g_free (path);
g_free (dir);
}
}
if (key != name)
g_free (key);
return provider;
}
static int
compare_properties (gconstpointer a, gconstpointer b, gpointer style)
{
const guint *ua = a;
const guint *ub = b;
PropertyValue *styles = style;
return strcmp (_gtk_style_property_get_name (GTK_STYLE_PROPERTY (styles[*ua].property)),
_gtk_style_property_get_name (GTK_STYLE_PROPERTY (styles[*ub].property)));
}
static int
compare_names (gconstpointer a, gconstpointer b)
{
const WidgetPropertyValue *aa = a;
const WidgetPropertyValue *bb = b;
return strcmp (aa->name, bb->name);
}
static void
gtk_css_ruleset_print (const GtkCssRuleset *ruleset,
GString *str)
{
GList *values, *walk;
WidgetPropertyValue *widget_value;
guint i;
_gtk_css_selector_print (ruleset->selector, str);
g_string_append (str, " {\n");
if (ruleset->styles)
{
guint *sorted = g_new (guint, ruleset->n_styles);
for (i = 0; i < ruleset->n_styles; i++)
sorted[i] = i;
/* so the output is identical for identical selector styles */
g_qsort_with_data (sorted, ruleset->n_styles, sizeof (guint), compare_properties, ruleset->styles);
for (i = 0; i < ruleset->n_styles; i++)
{
PropertyValue *prop = &ruleset->styles[sorted[i]];
g_string_append (str, " ");
g_string_append (str, _gtk_style_property_get_name (GTK_STYLE_PROPERTY (prop->property)));
g_string_append (str, ": ");
_gtk_css_style_property_print_value (prop->property, prop->value, str);
g_string_append (str, ";\n");
}
g_free (sorted);
}
if (ruleset->widget_style)
{
values = NULL;
for (widget_value = ruleset->widget_style; widget_value != NULL; widget_value = widget_value->next)
values = g_list_prepend (values, widget_value);
/* so the output is identical for identical selector styles */
values = g_list_sort (values, compare_names);
for (walk = values; walk; walk = walk->next)
{
widget_value = walk->data;
g_string_append (str, " ");
g_string_append (str, widget_value->name);
g_string_append (str, ": ");
g_string_append (str, widget_value->value);
g_string_append (str, ";\n");
}
g_list_free (values);
}
g_string_append (str, "}\n");
}
static void
gtk_css_provider_print_colors (GHashTable *colors,
GString *str)
{
GList *keys, *walk;
char *s;
keys = g_hash_table_get_keys (colors);
/* so the output is identical for identical styles */
keys = g_list_sort (keys, (GCompareFunc) strcmp);
for (walk = keys; walk; walk = walk->next)
{
const char *name = walk->data;
GtkSymbolicColor *symbolic = g_hash_table_lookup (colors, (gpointer) name);
g_string_append (str, "@define-color ");
g_string_append (str, name);
g_string_append (str, " ");
s = gtk_symbolic_color_to_string (symbolic);
g_string_append (str, s);
g_free (s);
g_string_append (str, ";\n");
}
g_list_free (keys);
}
/**
* gtk_css_provider_to_string:
* @provider: the provider to write to a string
*
* Convertes the @provider into a string representation in CSS
* format.
*
* Using gtk_css_provider_load_from_data() with the return value
* from this function on a new provider created with
* gtk_css_provider_new() will basicallu create a duplicate of
* this @provider.
*
* Returns: a new string representing the @provider.
*
* Since: 3.2
**/
char *
gtk_css_provider_to_string (GtkCssProvider *provider)
{
GtkCssProviderPrivate *priv;
GString *str;
guint i;
g_return_val_if_fail (GTK_IS_CSS_PROVIDER (provider), NULL);
priv = provider->priv;
str = g_string_new ("");
gtk_css_provider_print_colors (priv->symbolic_colors, str);
for (i = 0; i < priv->rulesets->len; i++)
{
if (str->len != 0)
g_string_append (str, "\n");
gtk_css_ruleset_print (&g_array_index (priv->rulesets, GtkCssRuleset, i), str);
}
return g_string_free (str, FALSE);
}
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