/* GTK - The GIMP Toolkit * Copyright (C) 2010 Carlos Garnacho * * 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 . */ #include "config.h" #include #include #include #include #include "gtkcssproviderprivate.h" #include "gtkbitmaskprivate.h" #include "gtkcssarrayvalueprivate.h" #include "gtkcsscolorvalueprivate.h" #include "gtkcsskeyframesprivate.h" #include "gtkcssparserprivate.h" #include "gtkcsssectionprivate.h" #include "gtkcssselectorprivate.h" #include "gtkcssshorthandpropertyprivate.h" #include "gtkcssstylefuncsprivate.h" #include "gtksettingsprivate.h" #include "gtkstyleprovider.h" #include "gtkstylecontextprivate.h" #include "gtkstylepropertyprivate.h" #include "gtkstyleproviderprivate.h" #include "gtkwidgetpath.h" #include "gtkbindings.h" #include "gtkmarshalers.h" #include "gtkprivate.h" #include "gtkintl.h" #include "gtkversion.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 [CSS-like](http://www.w3.org/TR/CSS2) * input in order to style widgets. * * ## Default files * * 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 `$XDG_CONFIG_HOME/gtk-3.0/gtk.css` * is loaded if it exists. Then, GTK+ tries to load * `$HOME/.themes/theme-name/gtk-3.0/gtk.css`, * falling back to * `datadir/share/themes/theme-name/gtk-3.0/gtk.css`, * where theme-name is the name of the current theme * (see the #GtkSettings:gtk-theme-name setting) and datadir * is the prefix configured when GTK+ was compiled, unless overridden by the * `GTK_DATA_PREFIX` environment variable. * * # Style sheets * * 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. * * 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. * * An example of a rule set with two selectors: * |[ * GtkButton, GtkEntry { * color: #ff00ea; * font: Comic Sans 12 * } * ]| * * # Selectors # {#gtkcssprovider-selectors} * * 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 * '#' character. The “*” character represents the so-called universal * selector, which matches any widget. * * To express more complicated situations, selectors can be combined in * various ways: * - To require that a widget satisfies several conditions, * combine several selectors into one by concatenating them. E.g. * `GtkButton#button1` matches a GtkButton widget * with the name button1. * - To only match a widget when it occurs inside some other * widget, write the two selectors after each other, separated by whitespace. * E.g. `GtkToolBar GtkButton` matches GtkButton widgets * that occur inside a GtkToolBar. * - 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. `GtkNotebook > GtkLabel` matches * GtkLabel widgets that are direct children of a GtkNotebook. * * ## Examples of widget classes and names in selectors * * Theme labels that are descendants of a window: * |[ * GtkWindow GtkLabel { * background-color: #898989 * } * ]| * * Theme notebooks, and anything that’s within these: * |[ * GtkNotebook { * background-color: #a939f0 * } * ]| * * Theme combo boxes, and entries that are direct children of a notebook: * |[ * GtkComboBox, * GtkNotebook > GtkEntry { * color: @fg_color; * background-color: #1209a2 * } * ]| * * Theme any widget within a GtkBin: * |[ * GtkBin * { * font: Sans 20 * } * ]| * * Theme a label named title-label: * |[ * GtkLabel#title-label { * font: Sans 15 * } * ]| * * Theme any widget named main-entry: * |[ * #main-entry { * background-color: #f0a810 * } * ]| * * 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. * * Refer to the documentation of individual widgets to learn which * style classes they define and see * [Style Classes and Regions][gtkstylecontext-classes] * for a list of all style classes used by GTK+ widgets. * * 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). * * ## Examples for style classes in selectors * * Theme all widgets defining the class entry: * |[ * .entry { * color: #39f1f9; * } * ]| * * Theme spinbuttons’ entry: * |[ * GtkSpinButton.entry { * color: #900185 * } * ]| * * 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. * * 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. * * Refer to the documentation of individual widgets to learn which * regions and pseudo-classes they define and see * [Style Classes and Regions][gtkstylecontext-classes] * for a list of all regions * used by GTK+ widgets. * * ## Examples for regions in selectors * * Theme any label within a notebook: * |[ * GtkNotebook GtkLabel { * color: #f90192; * } * ]| * * Theme labels within notebook tabs: * |[ * GtkNotebook tab GtkLabel { * color: #703910; * } * ]| * * Theme labels in the any first notebook tab, both selectors are * equivalent: * |[ * GtkNotebook tab:nth-child(first) GtkLabel, * GtkNotebook tab:first-child GtkLabel { * color: #89d012; * } * ]| * * 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. * * ## Examples for styling specific widget states * * Theme active (pressed) buttons: * |[ * GtkButton:active { * background-color: #0274d9; * } * ]| * * Theme buttons with the mouse pointer on it, both are equivalent: * |[ * GtkButton:hover, * GtkButton:prelight { * background-color: #3085a9; * } * ]| * * Theme insensitive widgets, both are equivalent: * |[ * :insensitive, * *:insensitive { * background-color: #320a91; * } * ]| * * Theme selection colors in entries: * |[ * GtkEntry:selected { * background-color: #56f9a0; * } * ]| * * Theme focused labels: * |[ * GtkLabel:focused { * background-color: #b4940f; * } * ]| * * Theme inconsistent checkbuttons: * |[ * GtkCheckButton:inconsistent { * background-color: #20395a; * } * ]| * * Widget state pseudoclasses may only apply to the last element * in a selector. * * 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. * * # @ Rules * * GTK+’s CSS supports the \@import rule, in order to load another * CSS style sheet in addition to the currently parsed one. * * An example for using the \@import rule: * |[ * @import url ("path/to/common.css"); * ]| * * In order to extend key bindings affecting different widgets, GTK+ * supports the \@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. * * Customized key bindings are typically defined in a separate * `gtk-keys.css` CSS file and GTK+ loads this file * according to the current key theme, which is defined by the * #GtkSettings:gtk-key-theme-name setting. * * An example for using the \@binding rule: * |[ * @binding-set binding-set1 { * bind "Left" { "move-cursor" (visual-positions, -3, 0) }; * unbind "End"; * }; * * @binding-set binding-set2 { * bind "Right" { "move-cursor" (visual-positions, 3, 0) }; * bind "KP_space" { "delete-from-cursor" (whitespace, 1) * "insert-at-cursor" (" ") }; * }; * * GtkEntry { * gtk-key-bindings: binding-set1, binding-set2; * } * ]| * * GTK+ also supports an additional \@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. * * An example for defining colors: * |[ * @define-color bg_color #f9a039; * * * { * background-color: @bg_color; * } * ]| * * # Symbolic colors * * 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. * * An example for using symbolic colors: * |[ * @define-color entry-color shade (@bg_color, 0.7); * * GtkEntry { * background-color: @entry-color; * } * * GtkEntry:focused { * background-color: mix (@entry-color, * shade (#fff, 0.5), * 0.8); * } * ]| * * # Specifying Colors # {#specifying-colors} * There are various ways to express colors in GTK+ CSS. * * ## rgb(r, g, b) * * An opaque color. * * - `r`, `g`, `b` can be either integers between 0 and 255, or percentages. * * |[ * color: rgb(128, 10, 54); * background-color: rgb(20%, 30%, 0%); * ]| * * ## rgba(r, g, b, a) * * A translucent color. * * - `r`, `g`, `b` can be either integers between 0 and 255, or percentages. * - `a` is a floating point number between 0 and 1. * * |[ * color: rgb(128, 10, 54, 0.5); * ]| * * ## \#xxyyzz * * An opaque color. * * - `xx`, `yy`, `zz` are hexadecimal numbers specifying `r`, `g`, `b` * variants with between 1 and 4 hexadecimal digits per component. * * |[ * color: #f0c; * background-color: #ff00cc; * border-color: #ffff0000cccc; * ]| * * ## \@name * * Reference to a color that has been defined with \@define-color * * |[ * color: @bg_color; * ]| * * ## mix(color1, color2, factor) * * A linear combination of `color1` and `color2`. * * - `factor` is a floating point number between 0 and 1. * * |[ * color: mix(#ff1e0a, @bg_color, 0.8); * ]| * * ## shade(color, factor) * * A lighter or darker variant of `color`. * * - `factor` is a floating point number. * * |[ * color: shade(@fg_color, 0.5); * ]| * * ## lighter(color) * * A lighter variant of `color`. * * |[ * color: lighter(@fg_color); * ]| * * ## darker(color) * * A darker variant of `color`. * * |[ * color: darker(@bg_color); * ]| * * ## alpha(color, factor) * * Modifies passed color’s alpha by a factor. * * - `factor` is a floating point number. `factor` < 1.0 results in a more * transparent color while `factor` > 1.0 results in a more opaque color. * * |[ * color: alpha(@fg_color, 0.5); * ]| * * * # Gradients * * Linear or radial gradients can be used as background images. * * ## Linear Gradients * * A linear gradient along the line from (`start_x`, `start_y`) to * (`end_x`, `end_y`) is specified using the following syntax: * * > `-gtk-gradient (linear, start_x start_y, end_x end_y, color-stop (position, color), ...)` * * - `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. * - `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. * * ## Example: Linear Gradient * ![](gradient1.png) * |[ * -gtk-gradient (linear, * left top, right bottom, * from(@yellow), to(@blue)); * ]| * * ## Example: Linear Gradient 2 * ![](gradient2.png) * |[ * -gtk-gradient (linear, * 0 0, 0 1, * color-stop(0, @yellow), * color-stop(0.2, @blue), * color-stop(1, #0f0)) * ]| * * ## Radial Gradients * * 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 following syntax: * * > `-gtk-gradient (radial, start_x start_y, start_radius, end_x end_y, end_radius, color-stop (position, color), ...)` * * where `start_radius` and `end_radius` are floating point numbers * and the other parameters are as before. * * ## Example: Radial Gradient * ![](gradient3.png) * |[ * -gtk-gradient (radial, * center center, 0, * center center, 1, * from(@yellow), to(@green)) * ]| * * ## Example: Radial Gradient 2 * ![](gradient4.png) * |[ * -gtk-gradient (radial, * 0.4 0.4, 0.1, * 0.6 0.6, 0.7, * color-stop (0, #f00), * color-stop (0.1, #a0f), * color-stop (0.2, @yellow), * color-stop (1, @green)) * ]| * * # Border images # {#border-images} * * 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](http://www.w3.org/TR/css3-background/#border-images). * * ![](slices.png) * * The parameters of the slicing process are controlled by four * separate properties. * * - Image Source * - Image Slice * - Image Width * - Image Repeat * * Note that you can use the `border-image` shorthand property to set * values for the properties at the same time. * * ## Image Source * * The border image source can be specified either as a * URL or a gradient: * |[ * border-image-source: url(path); * ]| * or * |[ * border-image-source: -gtk-gradient(...); * ]| * * ## Image Slice * * |[ * border-image-slice: top right bottom left; * ]| * * 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. * * ## Image Width * * |[ * border-image-width: top right bottom left; * ]| * * 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. * * ## Image Repeat * * Specifies how the image slices should be rendered in the area * outlined by border-width. * * |[ * border-image-repeat: [stretch|repeat|round|space]; * ]| * or * |[ * border-image-repeat: [stretch|repeat|round|space] [stretch|repeat|round|space]; * ]| * * - 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. * * * ## Example: Border Image * ![](border1.png) * |[ * border-image: url("gradient1.png") 10 10 10 10; * ]| * * ## Example: Repeating Border Image * ![](border2.png) * |[ * border-image: url("gradient1.png") 10 10 10 10 repeat; * ]| * * ## Example: Stetched Border Image * ![](border3.png) * |[ * border-image: url("gradient1.png") 10 10 10 10 stretch; * ]| * * * # Supported Properties * * 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). * * The currently supported properties are: * * ## engine: [name|none]; * * - `none` means to use the default (ie. builtin engine) * |[ * engine: clearlooks; * ]| * * ## background-color: [color|transparent]; * * - `color`: See [Specifying Colors][specifying-colors] * |[ * background-color: shade (@color1, 0.5); * ]| * * ## color: [color|transparent]; * * - `color`: See [Specifying Colors][specifying-colors] * |[ * color: #fff; * ]| * * ## border-color: [color|transparent]{1,4}; * * - `color`: See [Specifying Colors][specifying-colors] * - Four values used to specify: top right bottom left * - Three values used to specify: top vertical bottom * - Two values used to specify: horizontal vertical * - One value used to specify: color * |[ * border-color: red green blue; * ]| * * ## border-top-color: [color|transparent]; * * - `color`: See [Specifying Colors][specifying-colors] * |[ * border-top-color: @borders; * ]| * * ## border-right-color: [color|transparent]; * * - `color`: See [Specifying Colors][specifying-colors] * |[ * border-right-color: @borders; * ]| * * ## border-bottom-color: [color|transparent]; * * - `color`: See [Specifying Colors][specifying-colors] * |[ * border-bottom-color: @borders; * ]| * * ## border-left-color: [color|transparent]; * * - `color`: See [Specifying Colors][specifying-colors] * |[ * border-left-color: @borders; * ]| * * ## font-family: name; * * The name of the font family or font name to use. * * - Note: unlike the CSS2 Specification this does not support using a * prioritized list of font family names and/or generic family * names. * * |[ * font-family: Sans, Cantarell; * ]| * * ## font-style: [normal|oblique|italic]; * * Selects between normal, italic and oblique faces within a font family. * * |[ * font-style: italic; * ]| * * ## font-variant: [normal|small-caps]; * * In a small-caps font the lower case letters look similar to the * uppercase ones, but in a smaller size and with slightly different * proportions. * * |[ * font-variant: normal; * ]| * * ## font-weight: [normal|bold|bolder|lighter|100|200|300|400|500|600|700|800|900]; * * Selects the weight of the font. The values '100' to '900' form an * ordered sequence, where each number indicates a weight that is at * least as dark as its predecessor. The keyword 'normal' is * synonymous with '400', and 'bold' is synonymous with * '700'. Keywords other than 'normal' and 'bold' have been shown to * be often confused with font names and a numerical scale was * therefore chosen for the 9-value list. * - Maps to #PANGO_TYPE_WEIGHT * |[ * font-weight: bold; * ]| * * ## font-size: [absolute-size|relative-size|percentage]; * * - `absolute-size`: The size in normal size units like `px`, `pt`, * and `em`. Or symbolic sizes like `xx-small`, `x-small`, `small`, * `medium`, `large`, `x-large`, `xx-large`. * - `relative-size`: `larger` or `smaller` relative to the parent. * - `percentage`: A percentage difference from the nominal size. * |[ * font-size: 12px; * ]| * * ## font-stretch: [face] * * Selects a normal, condensed, or expanded face from a font family. * * Absolute keyword values have the following ordering, from narrowest to widest: * * - ultra-condensed * - extra-condensed * - condensed * - semi-condensed * - normal * - semi-expanded * - expanded * - extra-expanded * - ultra-expanded * * ## font: [family] [style] [variant] [stretch] [size]; * * A shorthand for setting a few font properties at once. * - Supports any format accepted by pango_font_description_from_string() * - Note: this is somewhat different from the CSS2 Specification for this property. * |[ * font: Bold 11; * ]| * * ## margin: [length|percentage]{1,4}; * * A shorthand for setting the margin space required on all sides of * an element. * - Four values used to specify: top right bottom left * - Three values used to specify: top horizontal bottom * - Two values used to specify: vertical horizontal * - One value used to specify: margin * |[ * margin: 1em 2em 4em; * ]| * * ## margin-top: [length|percentage]; * * Sets the margin space required on the top of an element. * |[ * margin-top: 10px; * ]| * * ## margin-right: [length|percentage]; * * Sets the margin space required on the right of an element. * |[ * margin-right: 0px; * ]| * * ## margin-bottom: [length|percentage]; * * Sets the margin space required on the bottom of an element. * |[ * margin-bottom: 10px; * ]| * * ## margin-left: [length|percentage]; * * Sets the margin space required on the left of an element. * |[ * margin-left: 1em; * ]| * * ## padding: [length|percentage]{1,4}; * * A shorthand for setting the padding space required on all sides of * an element. The padding area is the space between the content of * the element and its border. * - Four values used to specify: top right bottom left * - Three values used to specify: top horizontal bottom * - Two values used to specify: vertical horizontal * - One value used to specify: padding * |[ * padding: 1em 2em 4em; * ]| * * ## padding-top: [length|percentage]; * * Sets the padding space required on the top of an element. * |[ * padding-top: 10px; * ]| * * ## padding-right: [length|percentage]; * * Sets the padding space required on the right of an element. * |[ * padding-right: 0px; * ]| * * ## padding-bottom: [length|percentage]; * * Sets the padding space required on the bottom of an element. * |[ * padding-bottom: 10px; * ]| * * ## padding-left: [length|percentage]; * * Sets the padding space required on the left of an element. * |[ * padding-left: 1em; * ]| * * ## border-width: [width]{1,4}; * * A shorthand for setting the border width on all sides of * an element. * - Four values used to specify: top right bottom left * - Three values used to specify: top vertical bottom * - Two values used to specify: horizontal vertical * - One value used to specify: width * |[ * border-width: 1px 2px 4px; * ]| * * ## border-top-width: [width]; * * Sets the border width required on the top of an element. * |[ * border-top: 10px; * ]| * * ## border-right-width: [width]; * * Sets the border width required on the right of an element. * |[ * border-right: 0px; * ]| * * ## border-bottom-width: [width]; * * Sets the border width required on the bottom of an element. * |[ * border-bottom: 10px; * ]| * * ## border-left-width: [width]; * * Sets the border width required on the left of an element. * |[ * border-left: 1em; * ]| * * ## border-radius: [length|percentage]{1,4}; * * Allows setting how rounded all border corners are. * - Four values used to specify: top-left top-right bottom-right bottom-left * - Three values used to specify: top-left top-right-and-bottom-left bottom-right * - Two values used to specify: top-left-and-bottom-right top-right-and-bottom-left * - One value used to specify: radius on all sides * |[ * border-radius: 8px * ]| * * ## border-style: [none|solid|inset|outset]{1,4}; * * A shorthand property for setting the line style for all four sides * of the elements border. * - Four values used to specify: top right bottom left; * - Three values used to specify: top horizontal bottom * - Two values used to specify: vertical horizontal * - One value used to specify: style * |[ * border-style: solid; * ]| * * ## border-image: [source] [slice] [ / width ] [repeat]; A shorthand * for setting an image on the borders of elements. See [Border * Images][border-images]. * |[ * border-image: url("/path/to/image.png") 3 4 4 3 repeat stretch; * ]| * * ## border-image-source: [none|url|linear-gradient]{1,4}; * * Defines the image to use instead of the style of the border. If * this property is set to none, the style defined by border-style is * used instead. * |[ * border-image-source: url("/path/to/image.png"); * ]| * * ## border-image-slice: [number|percentage]{1,4}; * * Divides the image specified by border-image-source in nine regions: * the four corners, the four edges and the middle. It does this by * specifying 4 inwards offsets. * - Four values used to specify: top right bottom left; * - Three values used to specify: top vertical bottom * - Two values used to specify: horizontal vertical * - One value used to specify: slice * |[ * border-image-slice: 3 3 4 3; * ]| * * ## border-image-width: [length|percentage]{1,4}; * * Defines the offset to use for dividing the border image in nine * parts, the top-left corner, central top edge, top-right-corner, * central right edge, bottom-right corner, central bottom edge, * bottom-left corner, and central right edge. They represent inward * distance from the top, right, bottom, and left edges. * - Four values used to specify: top right bottom left; * - Three values used to specify: top horizontal bottom * - Two values used to specify: vertical horizontal * - One value used to specify: width * |[ * border-image-width: 4px 0 4px 0; * ]| * * ## border-image-repeat: [none|url|linear-gradient]{1,4}; * * Defines how the middle part of a border image is handled to match * the size of the border. It has a one-value syntax which describes * the behavior for all sides, and a two-value syntax that sets a * different value for the horizontal and vertical behavior. * - Two values used to specify: horizontal vertical * - One value used to specify: repeat * |[ * border-image-repeat: stretch; * ]| * * ## background-image: [none|url|linear-gradient], ... * Sets one or several background images for an element. The images * are drawn on successive stacking context layers, with the first * specified being drawn as if it is the closest to the user. The * borders of the element are then drawn on top of them, and the * background-color is drawn beneath them. * - There can be several sources listed, separated by commas. * |[ * background-image: gtk-gradient (linear, * left top, right top, * from (#fff), to (#000)); * ]| * * ## background-repeat: [repeat|no-repeat|space|round|repeat-x|repeat-y]; * * Defines how background images are repeated. A background image can * be repeated along the horizontal axis, the vertical axis, both, or * not repeated at all. * - `repeat`: The image is repeated in the given direction as much as * needed to cover the whole background image painting area. The * last image may be clipped if the whole thing won't fit in the * remaining area. * - `space`: The image is repeated in the given direction as much as * needed to cover most of the background image painting area, * without clipping an image. The remaining non-covered space is * spaced out evenly between the images. The first and last images * touches the edge of the element. The value of the * background-position CSS property is ignored for the concerned * direction, except if one single image is greater than the * background image painting area, which is the only case where an * image can be clipped when the space value is used. * - `round`: The image is repeated in the given direction as much as * needed to cover most of the background image painting area, * without clipping an image. If it doesn't cover exactly the area, * the tiles are resized in that direction in order to match it. * - `no-repeat`: The image is not repeated (and hence the background * image painting area will not necessarily been entirely * covered). The position of the non-repeated background image is * defined by the background-position CSS property. * - Note if not specified, the style doesn’t respect the CSS3 * specification, since the background will be stretched to fill * the area. * |[ * background-repeat: no-repeat; * ]| * * ## text-shadow: horizontal_offset vertical_offset [ blur_radius ] color; * * A shadow list can be applied to text or symbolic icons, using the CSS3 * text-shadow syntax, as defined in the * [CSS3 Specification](http://www.w3.org/TR/css3-text/#text-shadow). * * - 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. * * To set a shadow on an icon, use the `icon-shadow` property instead, * with the same syntax. * * To set multiple shadows on an element, you can specify a comma-separated list * of shadow elements in the `text-shadow` or `icon-shadow` property. Shadows are * always rendered front to 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 or icon itself, which is always rendered on top of the shadow layer. * * |[ * text-shadow: 1 1 0 blue, -4 -4 red; * ]| * ## box-shadow: [ inset ] horizontal_offset vertical_offset [ blur_radius ] [ spread ] color; * * Themes can apply shadows on framed elements using the CSS3 box-shadow syntax, * as defined in the * [CSS3 Specification](http://www.w3.org/TR/css3-background/#the-box-shadow). * * - 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. * * 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 to back (i.e. the first shadow specified is on top of the others) so they may * overlap other boxes or other shadows. * * |[ * box-shadow: inset 0 1px 1px alpha(black, 0.1); * ]| * * ## transition: duration [s|ms] [linear|ease|ease-in|ease-out|ease-in-out] [loop]; * * Styles can specify transitions that will be used to create a * gradual change in the appearance when a widget state changes. * - 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. * * - Linear * * ![](linear.png) * * - Ease transition * * ![](ease.png) * * - Ease-in-out transition * * ![](ease-in-out.png) * * - Ease-in transition * * ![](ease-in.png) * * - Ease-out transition * * ![](ease-out.png) * * |[ * transition: 150ms ease-in-out; * ]| * * * ## gtk-key-bindings: binding1, binding2, ...; * * Key binding set name list. * * ## Other Properties * * 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 * `-namespace-name`, where namespace is typically * the name of the theming engine, and name 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 namespace. * * An example for using engine-specific style properties: * |[ * * { * engine: clearlooks; * border-radius: 4; * -GtkPaned-handle-size: 6; * -clearlooks-colorize-scrollbar: false; * } * ]| */ 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; GtkCssSelectorTree *selector_match; 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; GHashTable *keyframes; GArray *rulesets; GtkCssSelectorTree *tree; 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_ADD_PRIVATE (GtkCssProvider) 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)) { char *s = _gtk_css_section_to_string (section); g_warning ("Theme parsing error: %s: %s", s, error->message); g_free (s); } } /* This is exported privately for use in GtkInspector. * It is the callers responsibility to reparse the current theme. */ void gtk_css_provider_set_keep_css_sections (void) { gtk_keep_css_sections = TRUE; } static void gtk_css_provider_class_init (GtkCssProviderClass *klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); if (g_getenv ("GTK_CSS_DEBUG")) gtk_css_provider_set_keep_css_sections (); /** * 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; } 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 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 = gtk_css_provider_get_instance_private (css_provider); 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_css_value_unref); priv->keyframes = g_hash_table_new_full (g_str_hash, g_str_equal, (GDestroyNotify) g_free, (GDestroyNotify) _gtk_css_value_unref); } static void verify_tree_match_results (GtkCssProvider *provider, const GtkCssMatcher *matcher, GPtrArray *tree_rules) { #ifdef VERIFY_TREE GtkCssProviderPrivate *priv = provider->priv; GtkCssRuleset *ruleset; gboolean should_match; int i, j; for (i = 0; i < priv->rulesets->len; i++) { gboolean found = FALSE; ruleset = &g_array_index (priv->rulesets, GtkCssRuleset, i); for (j = 0; j < tree_rules->len; j++) { if (ruleset == tree_rules->pdata[j]) { found = TRUE; break; } } should_match = _gtk_css_selector_matches (ruleset->selector, matcher); if (found != !!should_match) { g_error ("expected rule '%s' to %s, but it %s\n", _gtk_css_selector_to_string (ruleset->selector), should_match ? "match" : "not match", found ? "matched" : "didn't match"); } } #endif } static void verify_tree_get_change_results (GtkCssProvider *provider, const GtkCssMatcher *matcher, GtkCssChange change) { #ifdef VERIFY_TREE { GtkCssChange verify_change = 0; GPtrArray *tree_rules; int i; tree_rules = _gtk_css_selector_tree_match_all (provider->priv->tree, matcher); verify_tree_match_results (provider, matcher, tree_rules); for (i = tree_rules->len - 1; i >= 0; i--) { GtkCssRuleset *ruleset; ruleset = tree_rules->pdata[i]; verify_change |= _gtk_css_selector_get_change (ruleset->selector); } if (change != verify_change) { GString *s; s = g_string_new (""); g_string_append_printf (s, "expected change 0x%x, but it was 0x%x", verify_change, change); if ((change & ~verify_change) != 0) g_string_append_printf (s, ", unexpectedly set: 0x%x", change & ~verify_change); if ((~change & verify_change) != 0) g_string_append_printf (s, ", unexpectedly no set: 0x%x", ~change & verify_change); g_warning (s->str); g_string_free (s, TRUE); } g_ptr_array_free (tree_rules, TRUE); } #endif } 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; GPtrArray *tree_rules; GtkCssMatcher matcher; gboolean found = FALSE; gchar *prop_name; gint i; if (state == gtk_widget_path_iter_get_state (path, -1)) { gtk_widget_path_ref (path); } else { path = gtk_widget_path_copy (path); gtk_widget_path_iter_set_state (path, -1, state); } if (!_gtk_css_matcher_init (&matcher, path)) { gtk_widget_path_unref (path); return FALSE; } tree_rules = _gtk_css_selector_tree_match_all (priv->tree, &matcher); verify_tree_match_results (css_provider, &matcher, tree_rules); prop_name = g_strdup_printf ("-%s-%s", g_type_name (pspec->owner_type), pspec->name); for (i = tree_rules->len - 1; i >= 0; i--) { GtkCssRuleset *ruleset = tree_rules->pdata[i]; if (ruleset->widget_style == NULL) 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); g_ptr_array_free (tree_rules, TRUE); gtk_widget_path_unref (path); return found; } static void gtk_css_style_provider_iface_init (GtkStyleProviderIface *iface) { iface->get_style_property = gtk_css_provider_get_style_property; } static GtkCssValue * 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 GtkCssKeyframes * gtk_css_style_provider_get_keyframes (GtkStyleProviderPrivate *provider, const char *name) { GtkCssProvider *css_provider = GTK_CSS_PROVIDER (provider); return g_hash_table_lookup (css_provider->priv->keyframes, name); } static void gtk_css_style_provider_lookup (GtkStyleProviderPrivate *provider, const GtkCssMatcher *matcher, GtkCssLookup *lookup, GtkCssChange *change) { GtkCssProvider *css_provider; GtkCssProviderPrivate *priv; GtkCssRuleset *ruleset; guint j; int i; GPtrArray *tree_rules; css_provider = GTK_CSS_PROVIDER (provider); priv = css_provider->priv; tree_rules = _gtk_css_selector_tree_match_all (priv->tree, matcher); verify_tree_match_results (css_provider, matcher, tree_rules); for (i = tree_rules->len - 1; i >= 0; i--) { ruleset = tree_rules->pdata[i]; if (ruleset->styles == NULL) continue; if (!_gtk_bitmask_intersects (_gtk_css_lookup_get_missing (lookup), ruleset->set_styles)) 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); } if (_gtk_bitmask_is_empty (_gtk_css_lookup_get_missing (lookup))) break; } g_ptr_array_free (tree_rules, TRUE); if (change) { GtkCssMatcher change_matcher; _gtk_css_matcher_superset_init (&change_matcher, matcher, GTK_CSS_CHANGE_NAME | GTK_CSS_CHANGE_CLASS); *change = _gtk_css_selector_tree_get_change_all (priv->tree, &change_matcher); verify_tree_get_change_results (css_provider, &change_matcher, *change); } } static void gtk_css_style_provider_private_iface_init (GtkStyleProviderPrivateInterface *iface) { iface->get_color = gtk_css_style_provider_get_color; iface->get_keyframes = gtk_css_style_provider_get_keyframes; iface->lookup = gtk_css_style_provider_lookup; } 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); _gtk_css_selector_tree_free (priv->tree); g_hash_table_destroy (priv->symbolic_colors); g_hash_table_destroy (priv->keyframes); 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 %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); g_hash_table_remove_all (priv->keyframes); 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); _gtk_css_selector_tree_free (priv->tree); priv->tree = NULL; } static void gtk_css_provider_propagate_error (GtkCssProvider *provider, GtkCssSection *section, const GError *error, GError **propagate_to) { char *s; /* don't fail for deprecations */ if (g_error_matches (error, GTK_CSS_PROVIDER_ERROR, GTK_CSS_PROVIDER_ERROR_DEPRECATED)) { s = _gtk_css_section_to_string (section); g_warning ("Theme parsing error: %s: %s", s, error->message); g_free (s); 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); if (section) { s = _gtk_css_section_to_string (section); g_prefix_error (propagate_to, "%s", s); g_free (s); } } 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 *color; 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; } color = _gtk_css_color_value_parse (scanner->parser); if (color == 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 (color); 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, color); 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 gboolean parse_keyframes (GtkCssScanner *scanner) { GtkCssKeyframes *keyframes; char *name; gtk_css_scanner_push_section (scanner, GTK_CSS_SECTION_KEYFRAMES); if (!_gtk_css_parser_try (scanner->parser, "@keyframes", TRUE)) { gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_KEYFRAMES); 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 keyframes"); _gtk_css_parser_resync (scanner->parser, TRUE, 0); goto exit; } 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 keyframes"); _gtk_css_parser_resync (scanner->parser, TRUE, 0); g_free (name); goto exit; } keyframes = _gtk_css_keyframes_parse (scanner->parser); if (keyframes == NULL) { _gtk_css_parser_resync (scanner->parser, TRUE, '}'); g_free (name); goto exit; } g_hash_table_insert (scanner->provider->priv->keyframes, name, keyframes); 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); } exit: gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_KEYFRAMES); 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; if (parse_keyframes (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 gboolean name_is_style_property (const char *name) { if (name[0] != '-') return FALSE; if (g_str_has_prefix (name, "-gtk-")) return FALSE; return TRUE; } 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_is_style_property (name)) { 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_is_style_property (name)) { 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)) 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; GtkCssSelectorTreeBuilder *builder; guint i; g_array_sort (priv->rulesets, gtk_css_provider_compare_rule); builder = _gtk_css_selector_tree_builder_new (); for (i = 0; i < priv->rulesets->len; i++) { GtkCssRuleset *ruleset; ruleset = &g_array_index (priv->rulesets, GtkCssRuleset, i); _gtk_css_selector_tree_builder_add (builder, ruleset->selector, &ruleset->selector_match, ruleset); } priv->tree = _gtk_css_selector_tree_builder_build (builder); _gtk_css_selector_tree_builder_free (builder); #ifndef VERIFY_TREE for (i = 0; i < priv->rulesets->len; i++) { GtkCssRuleset *ruleset; ruleset = &g_array_index (priv->rulesets, GtkCssRuleset, i); _gtk_css_selector_free (ruleset->selector); ruleset->selector = NULL; } #endif } 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. The return value is deprecated and %FALSE will only be * returned for backwards compatibility reasons if an @error is not * %NULL and a loading error occured. To track errors while loading * CSS, connect to the #GtkCssProvider::parsing-error signal. **/ 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. The return value is deprecated and %FALSE will only be * returned for backwards compatibility reasons if an @error is not * %NULL and a loading error occured. To track errors while loading * CSS, connect to the #GtkCssProvider::parsing-error signal. **/ 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. The return value is deprecated and %FALSE will only be * returned for backwards compatibility reasons if an @error is not * %NULL and a loading error occured. To track errors while loading * CSS, connect to the #GtkCssProvider::parsing-error signal. **/ 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; } /** * gtk_css_provider_load_from_resource: * @css_provider: a #GtkCssProvider * @resource_path: a #GResource resource path * * Loads the data contained in the resource at @resource_path into * the #GtkCssProvider, clearing any previously loaded information. * * To track errors while loading CSS, connect to the * #GtkCssProvider::parsing-error signal. * * Since: 3.16 */ void gtk_css_provider_load_from_resource (GtkCssProvider *css_provider, const gchar *resource_path) { GFile *file; gchar *uri, *escaped; g_return_if_fail (GTK_IS_CSS_PROVIDER (css_provider)); g_return_if_fail (resource_path != NULL); 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); gtk_css_provider_load_from_file (css_provider, file, NULL); g_object_unref (file); } /** * 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; } #if (GTK_MINOR_VERSION % 2) #define MINOR (GTK_MINOR_VERSION + 1) #else #define MINOR GTK_MINOR_VERSION #endif /* * Look for * $dir/$subdir/gtk-3.16/gtk-$variant.css * $dir/$subdir/gtk-3.14/gtk-$variant.css * ... * $dir/$subdir/gtk-3.0/gtk-$variant.css * and return the first found file. * We don't check versions before 3.14, * since those GTK+ versions didn't have * the versioned loading mechanism. */ static gchar * _gtk_css_find_theme_dir (const gchar *dir, const gchar *subdir, const gchar *name, const gchar *variant) { gchar *file; gchar *base; gchar *subsubdir; gint i; gchar *path; if (variant) file = g_strconcat ("gtk-", variant, ".css", NULL); else file = g_strdup ("gtk.css"); if (subdir) base = g_build_filename (dir, subdir, name, NULL); else base = g_build_filename (dir, name, NULL); for (i = MINOR; i >= 0; i = i - 2) { if (i < 14) i = 0; subsubdir = g_strdup_printf ("gtk-3.%d", i); path = g_build_filename (base, subsubdir, file, NULL); g_free (subsubdir); if (g_file_test (path, G_FILE_TEST_EXISTS)) break; g_free (path); path = NULL; } g_free (file); g_free (base); return path; } #undef MINOR static gchar * _gtk_css_find_theme (const gchar *name, const gchar *variant) { gchar *path; const gchar *var; /* First look in the user's config directory */ path = _gtk_css_find_theme_dir (g_get_user_data_dir (), "themes", name, variant); if (path) return path; /* Next look in the user's home directory */ path = _gtk_css_find_theme_dir (g_get_home_dir (), ".themes", name, variant); if (path) return path; /* Finally, try in the default theme directory */ var = g_getenv ("GTK_DATA_PREFIX"); if (!var) var = _gtk_get_data_prefix (); path = _gtk_css_find_theme_dir (var, "share" G_DIR_SEPARATOR_S "themes", name, variant); return path; } /** * _gtk_css_provider_load_named: * @provider: a #GtkCssProvider * @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. The actual process of * finding the theme might change between releases, but it is * guaranteed that this function uses the same mechanism to load the * theme than GTK uses for loading its own theme. **/ void _gtk_css_provider_load_named (GtkCssProvider *provider, const gchar *name, const gchar *variant) { gchar *path; gchar *resource_path; g_return_if_fail (GTK_IS_CSS_PROVIDER (provider)); g_return_if_fail (name != NULL); gtk_css_provider_reset (provider); /* try loading the resource for the theme. This is mostly meant for built-in * themes. */ if (variant) resource_path = g_strdup_printf ("/org/gtk/libgtk/theme/%s-%s.css", name, variant); else resource_path = g_strdup_printf ("/org/gtk/libgtk/theme/%s.css", name); if (g_resources_get_info (resource_path, 0, NULL, NULL, NULL)) { gtk_css_provider_load_from_resource (provider, resource_path); g_free (resource_path); return; } g_free (resource_path); /* Next try looking for files in the various theme directories. */ path = _gtk_css_find_theme (name, variant); if (path) { char *dir, *resource_file; GResource *resource; 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); gtk_css_provider_load_from_path (provider, path, NULL); /* Only set this after load, as load_from_path will clear it */ provider->priv->resource = resource; g_free (path); g_free (dir); } else { /* Things failed! Fall back! Fall back! */ if (variant) { /* If there was a variant, try without */ _gtk_css_provider_load_named (provider, name, NULL); } else { /* Worst case, fall back to the default */ g_return_if_fail (!g_str_equal (name, DEFAULT_THEME_NAME)); /* infloop protection */ _gtk_css_provider_load_named (provider, DEFAULT_THEME_NAME, NULL); } } } /** * 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 = g_strdup (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) { provider = gtk_css_provider_new (); _gtk_css_provider_load_named (provider, name, variant); g_hash_table_insert (themes, g_strdup (key), provider); } 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_tree_match_print (ruleset->selector_match, 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_value_print (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; 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; GtkCssValue *color = g_hash_table_lookup (colors, (gpointer) name); g_string_append (str, "@define-color "); g_string_append (str, name); g_string_append (str, " "); _gtk_css_value_print (color, str); g_string_append (str, ";\n"); } g_list_free (keys); } static void gtk_css_provider_print_keyframes (GHashTable *keyframes, GString *str) { GList *keys, *walk; keys = g_hash_table_get_keys (keyframes); /* 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; GtkCssKeyframes *keyframe = g_hash_table_lookup (keyframes, (gpointer) name); if (str->len > 0) g_string_append (str, "\n"); g_string_append (str, "@keyframes "); g_string_append (str, name); g_string_append (str, " {\n"); _gtk_css_keyframes_print (keyframe, str); g_string_append (str, "}\n"); } g_list_free (keys); } /** * gtk_css_provider_to_string: * @provider: the provider to write to a string * * Converts 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 basically 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); gtk_css_provider_print_keyframes (priv->keyframes, 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); }