/* 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 "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 CSS-like * 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. * * A rule set with two selectors * * GtkButton, GtkEntry { * color: #ff00ea; * font: Comic Sans 12 * } * * * * * 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. * * * * 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 * 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). * * * 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 * for a list of all regions * used by GTK+ widgets. * * * 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. * * * 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. * * * 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. * * * Using the @binding rule * * @binding-set binding-set1 { * bind "<alt>Left" { "move-cursor" (visual-positions, -3, 0) }; * unbind "End"; * }; * * @binding-set binding-set2 { * bind "<alt>Right" { "move-cursor" (visual-positions, 3, 0) }; * bind "<alt>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. * * * 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. * * * 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); * } * * * * The various ways to express colors in GTK+ CSS are: * * * * * * Syntax * Explanation * Examples * * * * * rgb(@r, @g, @b) * An opaque color; @r, @g, @b can be either integers between * 0 and 255 or percentages * rgb(128, 10, 54) * rgb(20%, 30%, 0%) * * * rgba(@r, @g, @b, @a) * A translucent color; @r, @g, @b are as in the previous row, * @a is a floating point number between 0 and 1 * rgba(255, 255, 0, 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 are allowed * #ff12ab * #f0c * * * @name * Reference to a color that has been defined with * @define-color * * @bg_color * * * mix(@color1, @color2, @f) * A linear combination of @color1 and @color2. @f is a * floating point number between 0 and 1. * mix(#ff1e0a, @bg_color, 0.8) * * * shade(@color, @f) * A lighter or darker variant of @color. @f is a * floating point number. * * shade(@fg_color, 0.5) * * * lighter(@color) * A lighter variant of @color * * * darker(@color) * A darker variant of @color * * * alpha(@color, @f) * 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. * * alhpa(blue, 0.5) * * * * * * * Gradients * * Linear or radial Gradients can be used as background images. * * * A linear gradient along the line from (@start_x, @start_y) to * (@end_x, @end_y) is specified using the syntax * -gtk-gradient (linear, * @start_x @start_y, @end_x @end_y, * color-stop (@position, @color), * ...) * 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. * * * A linear gradient * * This gradient was specified with * -gtk-gradient (linear, * left top, right bottom, * from(@yellow), to(@blue)) * * * Another linear gradient * * This gradient was specified with * -gtk-gradient (linear, * 0 0, 0 1, * color-stop(0, @yellow), * color-stop(0.2, @blue), * color-stop(1, #0f0)) * * * 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 * -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. * * * A radial gradient * * This gradient was specified with * -gtk-gradient (radial, * center center, 0, * center center, 1, * from(@yellow), to(@green)) * * * Another radial gradient * * This gradient was specified with * -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)) * * * * Text shadow * * A shadow list can be applied to text or symbolic icons, using the CSS3 * text-shadow syntax, as defined in * the CSS3 specification. * * * A text shadow is specified using the syntax * text-shadow: @horizontal_offset @vertical_offset [ @blur_radius ] @color * 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 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. * * * * Box shadow * * Themes can apply shadows on framed elements using the CSS3 box-shadow syntax, * as defined in * the CSS3 specification. * * * A box shadow is specified using the syntax * box-shadow: [ @inset ] @horizontal_offset @vertical_offset [ @blur_radius ] [ @spread ] @color * 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. * * * 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. * * * * 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, * which can be found here. * * * * The parameters of the slicing process are controlled by * four separate properties. Note that you can use the * border-image shorthand property * to set values for the three properties at the same time. * * * border-image-source: url(@path) * (or border-image-source: -gtk-gradient(...)): * Specifies the source of the border image, and it can either * be an URL or a gradient (see above). * * * 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. * * * 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. * * * border-image-repeat: [stretch|repeat|round|space] ? * [stretch|repeat|round|space] * 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. * * * A border image * * This border image was specified with * url("gradient1.png") 10 10 10 10 * * * * A repeating border image * * This border image was specified with * url("gradient1.png") 10 10 10 10 repeat * * * * A stretched border image * * This border image was specified with * url("gradient1.png") 10 10 10 10 stretch * * * * * 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: * @duration [s|ms] [linear|ease|ease-in|ease-out|ease-in-out] [loop]? * 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 transition * *
*
Ease transition * *
*
Ease-in-out transition * *
*
Ease-in transition * *
*
Ease-out transition * *
*
*
* * 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: * * * * * * Property name * Syntax * Maps to * Examples * * * * * engine * engine-name * #GtkThemingEngine * engine: clearlooks; * engine: none; /* use the default (i.e. builtin) engine) */ * * * background-color * color (see above) * #GdkRGBA * background-color: #fff; * color: &color1; * background-color: shade (&color1, 0.5); * color: mix (&color1, #f0f, 0.8); * * * * color * * * border-top-color * transparent|color (see above) * * * border-right-color * * * border-bottom-color * * * border-left-color * * * border-color * [transparent|color]{1,4} * * * font-family * @family [, @family]* * #gchararray * font-family: Sans, Arial; * * * font-style * [normal|oblique|italic] * #PANGO_TYPE_STYLE * font-style: italic; * * * font-variant * [normal|small-caps] * #PANGO_TYPE_VARIANT * font-variant: normal; * * * font-weight * [normal|bold|bolder|lighter|100|200|300|400|500|600|700|800|900] * #PANGO_TYPE_WEIGHT * font-weight: bold; * * * font-size * Font size in point * #gint * font-size: 13; * * * font * @family [@style] [@size] * #PangoFontDescription * font: Sans 15; * * * margin-top * integer * #gint * margin-top: 0; * * * margin-left * integer * #gint * margin-left: 1; * * * margin-bottom * integer * #gint * margin-bottom: 2; * * * margin-right * integer * #gint * margin-right: 4; * * * margin * @width * @vertical_width @horizontal_width * @top_width @horizontal_width @bottom_width * @top_width @right_width @bottom_width @left_width * * #GtkBorder * margin: 5; * margin: 5 10; * margin: 5 10 3; * margin: 5 10 3 5; * * * * padding-top * integer * #gint * padding-top: 5; * * * padding-left * integer * #gint * padding-left: 5; * * * padding-bottom * integer * #gint * padding-bottom: 5; * * * padding-right * integer * #gint * padding-right: 5; * * * padding * * * background-image * gradient (see above) or * url(@path) * #cairo_pattern_t * -gtk-gradient (linear, * left top, right top, * from (#fff), to (#000)); * -gtk-gradient (linear, 0.0 0.5, 0.5 1.0, * from (#fff), * color-stop (0.5, #f00), * to (#000)); * -gtk-gradient (radial, * center center, 0.2, * center center, 0.8, * color-stop (0.0, #fff), * color-stop (1.0, #000)); * url ('background.png'); * * * * background-repeat * [repeat|no-repeat] * internal * background-repeat: no-repeat; * If not specified, the style doesn't respect the CSS3 * specification, since the background will be * stretched to fill the area. * * * * border-top-width * integer * #gint * border-top-width: 5; * * * border-left-width * integer * #gint * border-left-width: 5; * * * border-bottom-width * integer * #gint * border-bottom-width: 5; * * * border-right-width * integer * #gint * border-right-width: 5; * * * border-width * #GtkBorder * border-width: 1; * border-width: 1 2; * border-width: 1 2 3; * border-width: 1 2 3 5; * * * * border-radius * integer * #gint * border-radius: 5; * * * border-style * [none|solid|inset|outset] * #GtkBorderStyle * border-style: solid; * * * border-image * border image (see above) * internal use only * 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; * * * * text-shadow * shadow list (see above) * #GtkTextShadow * text-shadow: 1 1 0 blue, -4 -4 red; * * * transition * transition (see above) * internal use only * transition: 150ms ease-in-out; * transition: 1s linear loop; * * * * gtk-key-bindings * binding set name list * internal use only * gtk-bindings: binding1, binding2, ...; * * * * * * * 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. * * * 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; 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 = ""; } else { info = NULL; path = ""; } 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 = ""; } else { info = NULL; path = ""; } /* 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)) 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); }