/* 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 "gtkcssproviderprivate.h" #include #include "gtk/css/gtkcsstokenizerprivate.h" #include "gtk/css/gtkcssparserprivate.h" #include "gtkbitmaskprivate.h" #include "gtkcssarrayvalueprivate.h" #include "gtkcsscolorvalueprivate.h" #include "gtkcsskeyframesprivate.h" #include "gtkcssselectorprivate.h" #include "gtkcssshorthandpropertyprivate.h" #include "gtksettingsprivate.h" #include "gtkstyleprovider.h" #include "gtkstylepropertyprivate.h" #include "gtkstyleproviderprivate.h" #include "gtkmarshalers.h" #include "gtkprivate.h" #include "gtkintl.h" #include "gtkversion.h" #include #include #include #include "gdk/gdkprofilerprivate.h" #include #define GDK_ARRAY_NAME gtk_css_selectors #define GDK_ARRAY_TYPE_NAME GtkCssSelectors #define GDK_ARRAY_ELEMENT_TYPE GtkCssSelector * #define GDK_ARRAY_PREALLOC 64 #include "gdk/gdkarrayimpl.c" /** * GtkCssProvider: * * `GtkCssProvider` is an object implementing the `GtkStyleProvider` interface * for CSS. * * It is able to parse CSS-like input in order to style widgets. * * An application can make GTK parse a specific CSS style sheet by calling * [method@Gtk.CssProvider.load_from_file] or * [method@Gtk.CssProvider.load_from_resource] * and adding the provider with [method@Gtk.StyleContext.add_provider] or * [func@Gtk.StyleContext.add_provider_for_display]. * In addition, certain files will be read when GTK is initialized. * First, the file `$XDG_CONFIG_HOME/gtk-4.0/gtk.css` is loaded if it * exists. Then, GTK loads the first existing file among * `XDG_DATA_HOME/themes/THEME/gtk-VERSION/gtk-VARIANT.css`, * `$HOME/.themes/THEME/gtk-VERSION/gtk-VARIANT.css`, * `$XDG_DATA_DIRS/themes/THEME/gtk-VERSION/gtk-VARIANT.css` and * `DATADIR/share/themes/THEME/gtk-VERSION/gtk-VARIANT.css`, * where `THEME` is the name of the current theme (see the * [property@Gtk.Settings:gtk-theme-name] setting), `VARIANT` is the * variant to load (see the * [property@Gtk.Settings:gtk-application-prefer-dark-theme] setting), * `DATADIR` is the prefix configured when GTK was compiled (unless * overridden by the `GTK_DATA_PREFIX` environment variable), and * `VERSION` is the GTK version number. If no file is found for the * current version, GTK tries older versions all the way back to 4.0. * * To track errors while loading CSS, connect to the * [signal@Gtk.CssProvider::parsing-error] signal. */ #define MAX_SELECTOR_LIST_LENGTH 64 struct _GtkCssProviderClass { GObjectClass parent_class; void (* parsing_error) (GtkCssProvider *provider, GtkCssSection *section, const GError * error); }; typedef struct GtkCssRuleset GtkCssRuleset; typedef struct _GtkCssScanner GtkCssScanner; typedef struct _PropertyValue PropertyValue; typedef enum ParserScope ParserScope; typedef enum ParserSymbol ParserSymbol; struct _PropertyValue { GtkCssStyleProperty *property; GtkCssValue *value; GtkCssSection *section; }; struct GtkCssRuleset { GtkCssSelector *selector; GtkCssSelectorTree *selector_match; PropertyValue *styles; guint n_styles; guint owns_styles : 1; }; struct _GtkCssScanner { GtkCssProvider *provider; GtkCssParser *parser; GtkCssScanner *parent; }; struct _GtkCssProviderPrivate { GScanner *scanner; GHashTable *symbolic_colors; GHashTable *keyframes; GArray *rulesets; GtkCssSelectorTree *tree; GResource *resource; char *path; }; 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 (GtkStyleProviderInterface *iface); static void gtk_css_style_provider_emit_error (GtkStyleProvider *provider, GtkCssSection *section, const GError *error); static void gtk_css_provider_load_internal (GtkCssProvider *css_provider, GtkCssScanner *scanner, GFile *file, GBytes *bytes); 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)); 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 occurred. * * 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; } 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->selector) _gtk_css_selector_free (ruleset->selector); memset (ruleset, 0, sizeof (GtkCssRuleset)); } 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); 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) { g_object_unref (scanner->provider); gtk_css_parser_unref (scanner->parser); g_slice_free (GtkCssScanner, scanner); } static void gtk_css_style_provider_emit_error (GtkStyleProvider *provider, GtkCssSection *section, const GError *error) { g_signal_emit (provider, css_provider_signals[PARSING_ERROR], 0, section, error); } static void gtk_css_scanner_parser_error (GtkCssParser *parser, const GtkCssLocation *start, const GtkCssLocation *end, const GError *error, gpointer user_data) { GtkCssScanner *scanner = user_data; GtkCssSection *section; section = gtk_css_section_new (gtk_css_parser_get_file (parser), start, end); gtk_css_style_provider_emit_error (GTK_STYLE_PROVIDER (scanner->provider), section, error); gtk_css_section_unref (section); } static GtkCssScanner * gtk_css_scanner_new (GtkCssProvider *provider, GtkCssScanner *parent, GFile *file, GBytes *bytes) { GtkCssScanner *scanner; scanner = g_slice_new0 (GtkCssScanner); g_object_ref (provider); scanner->provider = provider; scanner->parent = parent; scanner->parser = gtk_css_parser_new_for_bytes (bytes, file, NULL, gtk_css_scanner_parser_error, scanner, NULL); 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_provider_init (GtkCssProvider *css_provider) { GtkCssProviderPrivate *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_keyframes_unref); } static void verify_tree_match_results (GtkCssProvider *provider, GtkCssNode *node, GtkCssSelectorMatches *tree_rules) { #ifdef VERIFY_TREE GtkCssProviderPrivate *priv = gtk_css_provider_get_instance_private (provider); 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 < gtk_css_selector_matches_get_size (tree_rules); j++) { if (ruleset == gtk_css_selector_matches_get (tree_rules, j)) { found = TRUE; break; } } should_match = gtk_css_selector_matches (ruleset->selector, node); if (found != !!should_match) { g_error ("expected rule '%s' to %s, but it %s", _gtk_css_selector_to_string (ruleset->selector), should_match ? "match" : "not match", found ? "matched" : "didn't match"); } } #endif } static GtkCssValue * gtk_css_style_provider_get_color (GtkStyleProvider *provider, const char *name) { GtkCssProvider *css_provider = GTK_CSS_PROVIDER (provider); GtkCssProviderPrivate *priv = gtk_css_provider_get_instance_private (css_provider); return g_hash_table_lookup (priv->symbolic_colors, name); } static GtkCssKeyframes * gtk_css_style_provider_get_keyframes (GtkStyleProvider *provider, const char *name) { GtkCssProvider *css_provider = GTK_CSS_PROVIDER (provider); GtkCssProviderPrivate *priv = gtk_css_provider_get_instance_private (css_provider); return g_hash_table_lookup (priv->keyframes, name); } static void gtk_css_style_provider_lookup (GtkStyleProvider *provider, const GtkCountingBloomFilter *filter, GtkCssNode *node, GtkCssLookup *lookup, GtkCssChange *change) { GtkCssProvider *css_provider = GTK_CSS_PROVIDER (provider); GtkCssProviderPrivate *priv = gtk_css_provider_get_instance_private (css_provider); GtkCssRuleset *ruleset; guint j; int i; GtkCssSelectorMatches tree_rules; if (_gtk_css_selector_tree_is_empty (priv->tree)) return; gtk_css_selector_matches_init (&tree_rules); _gtk_css_selector_tree_match_all (priv->tree, filter, node, &tree_rules); if (!gtk_css_selector_matches_is_empty (&tree_rules)) { verify_tree_match_results (css_provider, node, &tree_rules); for (i = gtk_css_selector_matches_get_size (&tree_rules) - 1; i >= 0; i--) { ruleset = gtk_css_selector_matches_get (&tree_rules, i); if (ruleset->styles == NULL) 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); } } } gtk_css_selector_matches_clear (&tree_rules); if (change) *change = gtk_css_selector_tree_get_change_all (priv->tree, filter, node); } static void gtk_css_style_provider_iface_init (GtkStyleProviderInterface *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; iface->emit_error = gtk_css_style_provider_emit_error; } static void gtk_css_provider_finalize (GObject *object) { GtkCssProvider *css_provider = GTK_CSS_PROVIDER (object); GtkCssProviderPrivate *priv = gtk_css_provider_get_instance_private (css_provider); guint i; 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_free (priv->path); 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 css_provider_commit (GtkCssProvider *css_provider, GtkCssSelectors *selectors, GtkCssRuleset *ruleset) { GtkCssProviderPrivate *priv = gtk_css_provider_get_instance_private (css_provider); guint i; if (ruleset->styles == NULL) { for (i = 0; i < gtk_css_selectors_get_size (selectors); i++) _gtk_css_selector_free (gtk_css_selectors_get (selectors, i)); return; } for (i = 0; i < gtk_css_selectors_get_size (selectors); i++) { GtkCssRuleset *new; g_array_set_size (priv->rulesets, priv->rulesets->len + 1); new = &g_array_index (priv->rulesets, GtkCssRuleset, priv->rulesets->len - 1); gtk_css_ruleset_init_copy (new, ruleset, gtk_css_selectors_get (selectors, i)); } } static void gtk_css_provider_reset (GtkCssProvider *css_provider) { GtkCssProviderPrivate *priv = gtk_css_provider_get_instance_private (css_provider); guint i; if (priv->resource) { g_resources_unregister (priv->resource); g_resource_unref (priv->resource); priv->resource = NULL; } if (priv->path) { g_free (priv->path); priv->path = 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 gboolean parse_import (GtkCssScanner *scanner) { GFile *file; if (!gtk_css_parser_try_at_keyword (scanner->parser, "import")) return FALSE; if (gtk_css_parser_has_token (scanner->parser, GTK_CSS_TOKEN_STRING)) { char *url; url = gtk_css_parser_consume_string (scanner->parser); if (url) { file = gtk_css_parser_resolve_url (scanner->parser, url); if (file == NULL) { gtk_css_parser_error_import (scanner->parser, "Could not resolve \"%s\" to a valid URL", url); } g_free (url); } else file = NULL; } else { char *url = gtk_css_parser_consume_url (scanner->parser); if (url) { file = gtk_css_parser_resolve_url (scanner->parser, url); g_free (url); } else file = NULL; } if (file == NULL) { /* nothing to do */ } else if (!gtk_css_parser_has_token (scanner->parser, GTK_CSS_TOKEN_EOF)) { gtk_css_parser_error_syntax (scanner->parser, "Expected ';'"); } else if (gtk_css_scanner_would_recurse (scanner, file)) { char *path = g_file_get_path (file); gtk_css_parser_error (scanner->parser, GTK_CSS_PARSER_ERROR_IMPORT, gtk_css_parser_get_block_location (scanner->parser), gtk_css_parser_get_end_location (scanner->parser), "Loading '%s' would recurse", path); g_free (path); } else { gtk_css_provider_load_internal (scanner->provider, scanner, file, NULL); } g_clear_object (&file); return TRUE; } static gboolean parse_color_definition (GtkCssScanner *scanner) { GtkCssProviderPrivate *priv = gtk_css_provider_get_instance_private (scanner->provider); GtkCssValue *color; char *name; if (!gtk_css_parser_try_at_keyword (scanner->parser, "define-color")) return FALSE; name = gtk_css_parser_consume_ident (scanner->parser); if (name == NULL) return TRUE; color = _gtk_css_color_value_parse (scanner->parser); if (color == NULL) { g_free (name); return TRUE; } if (!gtk_css_parser_has_token (scanner->parser, GTK_CSS_TOKEN_EOF)) { g_free (name); _gtk_css_value_unref (color); gtk_css_parser_error_syntax (scanner->parser, "Missing semicolon at end of color definition"); return TRUE; } g_hash_table_insert (priv->symbolic_colors, name, color); return TRUE; } static gboolean parse_keyframes (GtkCssScanner *scanner) { GtkCssProviderPrivate *priv = gtk_css_provider_get_instance_private (scanner->provider); GtkCssKeyframes *keyframes; char *name; if (!gtk_css_parser_try_at_keyword (scanner->parser, "keyframes")) return FALSE; name = gtk_css_parser_consume_ident (scanner->parser); if (name == NULL) return FALSE; if (!gtk_css_parser_has_token (scanner->parser, GTK_CSS_TOKEN_EOF)) { gtk_css_parser_error_syntax (scanner->parser, "Expected '{' for keyframes"); return FALSE; } gtk_css_parser_end_block_prelude (scanner->parser); keyframes = _gtk_css_keyframes_parse (scanner->parser); if (keyframes != NULL) g_hash_table_insert (priv->keyframes, name, keyframes); if (!gtk_css_parser_has_token (scanner->parser, GTK_CSS_TOKEN_EOF)) gtk_css_parser_error_syntax (scanner->parser, "Expected '}' after declarations"); return TRUE; } static void parse_at_keyword (GtkCssScanner *scanner) { gtk_css_parser_start_semicolon_block (scanner->parser, GTK_CSS_TOKEN_OPEN_CURLY); if (!parse_import (scanner) && !parse_color_definition (scanner) && !parse_keyframes (scanner)) { gtk_css_parser_error_syntax (scanner->parser, "Unknown @ rule"); } gtk_css_parser_end_block (scanner->parser); } static void parse_selector_list (GtkCssScanner *scanner, GtkCssSelectors *selectors) { do { GtkCssSelector *select = _gtk_css_selector_parse (scanner->parser); if (select == NULL) { for (int i = 0; i < gtk_css_selectors_get_size (selectors); i++) _gtk_css_selector_free (gtk_css_selectors_get (selectors, i)); gtk_css_selectors_clear (selectors); return; } gtk_css_selectors_append (selectors, select); } while (gtk_css_parser_try_token (scanner->parser, GTK_CSS_TOKEN_COMMA)); } static void parse_declaration (GtkCssScanner *scanner, GtkCssRuleset *ruleset) { GtkStyleProperty *property; char *name; /* advance the location over whitespace */ gtk_css_parser_get_token (scanner->parser); gtk_css_parser_start_semicolon_block (scanner->parser, GTK_CSS_TOKEN_EOF); if (gtk_css_parser_has_token (scanner->parser, GTK_CSS_TOKEN_EOF)) { gtk_css_parser_warn_syntax (scanner->parser, "Empty declaration"); gtk_css_parser_end_block (scanner->parser); return; } name = gtk_css_parser_consume_ident (scanner->parser); if (name == NULL) goto out; property = _gtk_style_property_lookup (name); if (property) { GtkCssSection *section; GtkCssValue *value; if (!gtk_css_parser_try_token (scanner->parser, GTK_CSS_TOKEN_COLON)) { gtk_css_parser_error_syntax (scanner->parser, "Expected ':'"); goto out; } value = _gtk_style_property_parse_value (property, scanner->parser); if (value == NULL) goto out; if (!gtk_css_parser_has_token (scanner->parser, GTK_CSS_TOKEN_EOF)) { gtk_css_parser_error_syntax (scanner->parser, "Junk at end of value for %s", property->name); goto out; } if (gtk_keep_css_sections) { section = gtk_css_section_new (gtk_css_parser_get_file (scanner->parser), gtk_css_parser_get_block_location (scanner->parser), gtk_css_parser_get_end_location (scanner->parser)); } else section = NULL; 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), 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, section); } else { g_assert_not_reached (); _gtk_css_value_unref (value); } g_clear_pointer (§ion, gtk_css_section_unref); } else { gtk_css_parser_error_value (scanner->parser, "No property named \"%s\"", name); } out: g_free (name); gtk_css_parser_end_block (scanner->parser); } static void parse_declarations (GtkCssScanner *scanner, GtkCssRuleset *ruleset) { while (!gtk_css_parser_has_token (scanner->parser, GTK_CSS_TOKEN_EOF)) { parse_declaration (scanner, ruleset); } } static void parse_ruleset (GtkCssScanner *scanner) { GtkCssSelectors selectors; GtkCssRuleset ruleset = { 0, }; gtk_css_selectors_init (&selectors); parse_selector_list (scanner, &selectors); if (gtk_css_selectors_get_size (&selectors) == 0) { gtk_css_parser_skip_until (scanner->parser, GTK_CSS_TOKEN_OPEN_CURLY); gtk_css_parser_skip (scanner->parser); goto out; } if (!gtk_css_parser_has_token (scanner->parser, GTK_CSS_TOKEN_OPEN_CURLY)) { guint i; gtk_css_parser_error_syntax (scanner->parser, "Expected '{' after selectors"); for (i = 0; i < gtk_css_selectors_get_size (&selectors); i++) _gtk_css_selector_free (gtk_css_selectors_get (&selectors, i)); gtk_css_parser_skip_until (scanner->parser, GTK_CSS_TOKEN_OPEN_CURLY); gtk_css_parser_skip (scanner->parser); goto out; } gtk_css_parser_start_block (scanner->parser); parse_declarations (scanner, &ruleset); gtk_css_parser_end_block (scanner->parser); css_provider_commit (scanner->provider, &selectors, &ruleset); gtk_css_ruleset_clear (&ruleset); out: gtk_css_selectors_clear (&selectors); } static void parse_statement (GtkCssScanner *scanner) { if (gtk_css_parser_has_token (scanner->parser, GTK_CSS_TOKEN_AT_KEYWORD)) parse_at_keyword (scanner); else parse_ruleset (scanner); } static void parse_stylesheet (GtkCssScanner *scanner) { while (!gtk_css_parser_has_token (scanner->parser, GTK_CSS_TOKEN_EOF)) { if (gtk_css_parser_has_token (scanner->parser, GTK_CSS_TOKEN_CDO) || gtk_css_parser_has_token (scanner->parser, GTK_CSS_TOKEN_CDC)) { gtk_css_parser_consume_token (scanner->parser); continue; } parse_statement (scanner); } } 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 = gtk_css_provider_get_instance_private (css_provider); GtkCssSelectorTreeBuilder *builder; guint i; gint64 before G_GNUC_UNUSED; before = GDK_PROFILER_CURRENT_TIME; 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 gdk_profiler_end_mark (before, "create selector tree", NULL); } static void gtk_css_provider_load_internal (GtkCssProvider *self, GtkCssScanner *parent, GFile *file, GBytes *bytes) { gint64 before G_GNUC_UNUSED; before = GDK_PROFILER_CURRENT_TIME; if (bytes == NULL) { GError *load_error = NULL; bytes = g_file_load_bytes (file, NULL, NULL, &load_error); if (bytes == NULL) { if (parent == NULL) { GtkCssLocation empty = { 0, }; GtkCssSection *section = gtk_css_section_new (file, &empty, &empty); gtk_css_style_provider_emit_error (GTK_STYLE_PROVIDER (self), section, load_error); gtk_css_section_unref (section); } else { gtk_css_parser_error (parent->parser, GTK_CSS_PARSER_ERROR_IMPORT, gtk_css_parser_get_block_location (parent->parser), gtk_css_parser_get_end_location (parent->parser), "Failed to import: %s", load_error->message); } g_error_free (load_error); } } if (bytes) { GtkCssScanner *scanner; scanner = gtk_css_scanner_new (self, parent, file, bytes); parse_stylesheet (scanner); gtk_css_scanner_destroy (scanner); if (parent == NULL) gtk_css_provider_postprocess (self); g_bytes_unref (bytes); } if (GDK_PROFILER_IS_RUNNING) { char *uri = g_file_get_uri (file); gdk_profiler_end_mark (before, "theme load", uri); g_free (uri); } } /** * 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. * * Loads @data into @css_provider. * * This clears any previously loaded information. */ void gtk_css_provider_load_from_data (GtkCssProvider *css_provider, const char *data, gssize length) { GBytes *bytes; g_return_if_fail (GTK_IS_CSS_PROVIDER (css_provider)); g_return_if_fail (data != NULL); if (length < 0) length = strlen (data); bytes = g_bytes_new_static (data, length); gtk_css_provider_reset (css_provider); g_bytes_ref (bytes); gtk_css_provider_load_internal (css_provider, NULL, NULL, bytes); g_bytes_unref (bytes); gtk_style_provider_changed (GTK_STYLE_PROVIDER (css_provider)); } /** * gtk_css_provider_load_from_file: * @css_provider: a `GtkCssProvider` * @file: `GFile` pointing to a file to load * * Loads the data contained in @file into @css_provider. * * This clears any previously loaded information. */ void gtk_css_provider_load_from_file (GtkCssProvider *css_provider, GFile *file) { g_return_if_fail (GTK_IS_CSS_PROVIDER (css_provider)); g_return_if_fail (G_IS_FILE (file)); gtk_css_provider_reset (css_provider); gtk_css_provider_load_internal (css_provider, NULL, file, NULL); gtk_style_provider_changed (GTK_STYLE_PROVIDER (css_provider)); } /** * gtk_css_provider_load_from_path: * @css_provider: a `GtkCssProvider` * @path: the path of a filename to load, in the GLib filename encoding * * Loads the data contained in @path into @css_provider. * * This clears any previously loaded information. */ void gtk_css_provider_load_from_path (GtkCssProvider *css_provider, const char *path) { GFile *file; g_return_if_fail (GTK_IS_CSS_PROVIDER (css_provider)); g_return_if_fail (path != NULL); file = g_file_new_for_path (path); gtk_css_provider_load_from_file (css_provider, file); g_object_unref (file); } /** * 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 @css_provider. * * This clears any previously loaded information. */ void gtk_css_provider_load_from_resource (GtkCssProvider *css_provider, const char *resource_path) { GFile *file; char *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); g_object_unref (file); } char * _gtk_get_theme_dir (void) { const char *var; var = g_getenv ("GTK_DATA_PREFIX"); if (var == NULL) var = _gtk_get_data_prefix (); return g_build_filename (var, "share", "themes", NULL); } /* Return the path that this providers gtk.css was loaded from, * if it is part of a theme, otherwise NULL. */ const char * _gtk_css_provider_get_theme_dir (GtkCssProvider *provider) { GtkCssProviderPrivate *priv = gtk_css_provider_get_instance_private (provider); return priv->path; } #if (GTK_MINOR_VERSION % 2) #define MINOR (GTK_MINOR_VERSION + 1) #else #define MINOR GTK_MINOR_VERSION #endif /* * Look for * $dir/$subdir/gtk-4.16/gtk-$variant.css * $dir/$subdir/gtk-4.14/gtk-$variant.css * ... * $dir/$subdir/gtk-4.0/gtk-$variant.css * and return the first found file. */ static char * _gtk_css_find_theme_dir (const char *dir, const char *subdir, const char *name, const char *variant) { char *file; char *base; char *subsubdir; int i; char *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) { subsubdir = g_strdup_printf ("gtk-4.%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 char * _gtk_css_find_theme (const char *name, const char *variant) { char *path; const char *const *dirs; int i; char *dir; /* First look in the user's data 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; /* Look in system data directories */ dirs = g_get_system_data_dirs (); for (i = 0; dirs[i]; i++) { path = _gtk_css_find_theme_dir (dirs[i], "themes", name, variant); if (path) return path; } /* Finally, try in the default theme directory */ dir = _gtk_get_theme_dir (); path = _gtk_css_find_theme_dir (dir, NULL, name, variant); g_free (dir); return path; } /** * gtk_css_provider_load_named: * @provider: a `GtkCssProvider` * @name: A theme name * @variant: (nullable): 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 that GTK uses for loading its own theme. */ void gtk_css_provider_load_named (GtkCssProvider *provider, const char *name, const char *variant) { char *path; char *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/gtk-%s.css", name, variant); else resource_path = g_strdup_printf ("/org/gtk/libgtk/theme/%s/gtk.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) { GtkCssProviderPrivate *priv = gtk_css_provider_get_instance_private (provider); 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); /* Only set this after load, as load_from_path will clear it */ priv->resource = resource; priv->path = dir; g_free (path); } else { /* Things failed! Fall back! Fall back! * * We accept the names HighContrast, HighContrastInverse, * Adwaita and Adwaita-dark as aliases for the variants * of the Default theme. */ if (strcmp (name, "HighContrast") == 0) { if (g_strcmp0 (variant, "dark") == 0) gtk_css_provider_load_named (provider, DEFAULT_THEME_NAME, "hc-dark"); else gtk_css_provider_load_named (provider, DEFAULT_THEME_NAME, "hc"); } else if (strcmp (name, "HighConstrastInverse") == 0) gtk_css_provider_load_named (provider, DEFAULT_THEME_NAME, "hc-dark"); else if (strcmp (name, "Adwaita-dark") == 0) gtk_css_provider_load_named (provider, DEFAULT_THEME_NAME, "dark"); else if (strcmp (name, DEFAULT_THEME_NAME) != 0) gtk_css_provider_load_named (provider, DEFAULT_THEME_NAME, variant); else { g_return_if_fail (variant != NULL); gtk_css_provider_load_named (provider, DEFAULT_THEME_NAME, NULL); } } } 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 void gtk_css_ruleset_print (const GtkCssRuleset *ruleset, GString *str) { 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); } 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 [method@Gtk.CssProvider.load_from_data] with the return * value from this function on a new provider created with * [ctor@Gtk.CssProvider.new] will basically create a duplicate * of this @provider. * * Returns: a new string representing the @provider. */ char * gtk_css_provider_to_string (GtkCssProvider *provider) { GtkCssProviderPrivate *priv = gtk_css_provider_get_instance_private (provider); GString *str; guint i; g_return_val_if_fail (GTK_IS_CSS_PROVIDER (provider), NULL); 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); }