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-rw-r--r--e-util/e-web-view.c263
1 files changed, 244 insertions, 19 deletions
diff --git a/e-util/e-web-view.c b/e-util/e-web-view.c
index 4257152ca8..668b3952de 100644
--- a/e-util/e-web-view.c
+++ b/e-util/e-web-view.c
@@ -564,6 +564,59 @@ web_view_navigation_policy_decision_requested_cb (EWebView *web_view,
}
static void
+style_updated_cb (EWebView *web_view)
+{
+ GdkRGBA color;
+ gchar *color_value;
+ gchar *style;
+ GtkStateFlags state_flags;
+ GtkStyleContext *style_context;
+ GtkWidgetPath *widget_path;
+
+ state_flags = gtk_widget_get_state_flags (GTK_WIDGET (web_view));
+ style_context = gtk_style_context_new ();
+ widget_path = gtk_widget_path_new ();
+ gtk_widget_path_append_type (widget_path, GTK_TYPE_WINDOW);
+ gtk_style_context_set_path (style_context, widget_path);
+ gtk_style_context_add_class (style_context, GTK_STYLE_CLASS_ENTRY);
+
+ gtk_style_context_get_background_color (
+ style_context,
+ state_flags | GTK_STATE_FLAG_FOCUSED,
+ &color);
+ color_value = g_strdup_printf ("#%06x", e_rgba_to_value (&color));
+ style = g_strconcat ("background-color: ", color_value, ";", NULL);
+
+ e_web_view_add_css_rule_into_style_sheet (
+ web_view,
+ "-e-web-view-css-sheet",
+ ".-e-web-view-background-color",
+ style);
+
+ g_free (color_value);
+ g_free (style);
+
+ gtk_style_context_get_color (
+ style_context,
+ state_flags | GTK_STATE_FLAG_FOCUSED,
+ &color);
+ color_value = g_strdup_printf ("#%06x", e_rgba_to_value (&color));
+ style = g_strconcat ("color: ", color_value, ";", NULL);
+
+ e_web_view_add_css_rule_into_style_sheet (
+ web_view,
+ "-e-web-view-css-sheet",
+ ".-e-web-view-text-color",
+ style);
+
+ gtk_widget_path_free (widget_path);
+ g_object_unref (style_context);
+
+ g_free (color_value);
+ g_free (style);
+}
+
+static void
web_view_load_status_changed_cb (WebKitWebView *webkit_web_view,
GParamSpec *pspec,
gpointer user_data)
@@ -575,14 +628,17 @@ web_view_load_status_changed_cb (WebKitWebView *webkit_web_view,
status = webkit_web_view_get_load_status (webkit_web_view);
- if (status == WEBKIT_LOAD_FINISHED) {
- web_view_update_document_highlights (web_view);
+ if (status != WEBKIT_LOAD_FINISHED)
+ return;
- /* Workaround webkit bug:
- * https://bugs.webkit.org/show_bug.cgi?id=89553 */
- e_web_view_zoom_in (web_view);
- e_web_view_zoom_out (web_view);
- }
+ style_updated_cb (web_view);
+
+ web_view_update_document_highlights (web_view);
+
+ /* Workaround webkit bug:
+ * https://bugs.webkit.org/show_bug.cgi?id=89553 */
+ e_web_view_zoom_in (web_view);
+ e_web_view_zoom_out (web_view);
}
static void
@@ -1579,6 +1635,14 @@ e_web_view_init (EWebView *web_view)
web_view, "notify::load-status",
G_CALLBACK (web_view_load_status_changed_cb), NULL);
+ g_signal_connect (
+ web_view, "style-updated",
+ G_CALLBACK (style_updated_cb), NULL);
+
+ g_signal_connect (
+ web_view, "state-flags-changed",
+ G_CALLBACK (style_updated_cb), NULL);
+
ui_manager = gtk_ui_manager_new ();
web_view->priv->ui_manager = ui_manager;
@@ -1725,6 +1789,8 @@ e_web_view_init (EWebView *web_view)
id = "org.gnome.evolution.webview";
e_plugin_ui_register_manager (ui_manager, id, web_view);
e_plugin_ui_enable_manager (ui_manager, id);
+
+ e_web_view_clear (E_WEB_VIEW (web_view));
}
GtkWidget *
@@ -1736,21 +1802,15 @@ e_web_view_new (void)
void
e_web_view_clear (EWebView *web_view)
{
- GtkStyle *style;
- gchar *html;
-
g_return_if_fail (E_IS_WEB_VIEW (web_view));
- style = gtk_widget_get_style (GTK_WIDGET (web_view));
-
- html = g_strdup_printf (
- "<html><head></head><body bgcolor=\"#%06x\"></body></html>",
- e_color_to_value (&style->base[GTK_STATE_NORMAL]));
-
webkit_web_view_load_html_string (
- WEBKIT_WEB_VIEW (web_view), html, NULL);
-
- g_free (html);
+ WEBKIT_WEB_VIEW (web_view),
+ "<html> \
+ <head></head> \
+ <body class=\"-e-web-view-background-color -e-web-view-text-color\"></body> \
+ </html>",
+ NULL);
}
void
@@ -3234,3 +3294,168 @@ e_web_view_install_request_handler (EWebView *web_view,
g_object_unref (feature);
}
+static void
+create_and_add_css_style_sheet (WebKitDOMDocument *document,
+ const gchar *style_sheet_id)
+{
+ WebKitDOMElement *style_element;
+
+ style_element = webkit_dom_document_get_element_by_id (document, style_sheet_id);
+
+ if (!style_element) {
+ /* Create new <style> element */
+ style_element = webkit_dom_document_create_element (document, "style", NULL);
+ webkit_dom_html_element_set_id (
+ WEBKIT_DOM_HTML_ELEMENT (style_element),
+ style_sheet_id);
+ webkit_dom_html_style_element_set_media (
+ WEBKIT_DOM_HTML_STYLE_ELEMENT (style_element),
+ "screen");
+ webkit_dom_node_append_child (
+ WEBKIT_DOM_NODE (style_element),
+ /* WebKit hack - we have to insert empty TextNode into style element */
+ WEBKIT_DOM_NODE (webkit_dom_document_create_text_node (document, "")),
+ NULL);
+
+ webkit_dom_node_append_child (
+ WEBKIT_DOM_NODE (webkit_dom_document_get_head (document)),
+ WEBKIT_DOM_NODE (style_element),
+ NULL);
+ }
+}
+
+static void
+add_css_rule_into_style_sheet (WebKitDOMDocument *document,
+ const gchar *style_sheet_id,
+ const gchar *selector,
+ const gchar *style)
+{
+ WebKitDOMElement *style_element;
+ WebKitDOMStyleSheet *sheet;
+ WebKitDOMCSSRuleList *rules_list;
+ gint length, ii;
+
+ style_element = webkit_dom_document_get_element_by_id (document, style_sheet_id);
+
+ if (!style_element) {
+ create_and_add_css_style_sheet (document, style_sheet_id);
+ style_element = webkit_dom_document_get_element_by_id (document, style_sheet_id);
+ }
+
+ /* Get sheet that is associated with style element */
+ sheet = webkit_dom_html_style_element_get_sheet (WEBKIT_DOM_HTML_STYLE_ELEMENT (style_element));
+
+ rules_list = webkit_dom_css_style_sheet_get_css_rules (WEBKIT_DOM_CSS_STYLE_SHEET (sheet));
+ length = webkit_dom_css_rule_list_get_length (rules_list);
+
+ /* Check if rule exists */
+ for (ii = 0; ii < length; ii++) {
+ WebKitDOMCSSRule *rule;
+ const gchar *rule_text;
+ gchar *rule_selector, *selector_end;
+
+ rule = webkit_dom_css_rule_list_item (rules_list, ii);
+
+ if (!WEBKIT_DOM_IS_CSS_RULE (rule))
+ continue;
+
+ rule_text = webkit_dom_css_rule_get_css_text (rule);
+
+ /* Find the start of the style => end of the selector */
+ selector_end = g_strstr_len (rule_text, -1, " {");
+ if (!selector_end)
+ continue;
+
+ rule_selector =
+ g_utf8_substring (
+ rule_text,
+ 0,
+ g_utf8_pointer_to_offset (rule_text, selector_end));
+
+ if (g_strcmp0 (rule_selector, selector) == 0) {
+ /* If exists remove it */
+ webkit_dom_css_style_sheet_remove_rule (
+ WEBKIT_DOM_CSS_STYLE_SHEET (sheet),
+ ii, NULL);
+ }
+
+ g_free (rule_selector);
+ }
+
+ /* Insert the rule at the end, so it will override previously inserted */
+ webkit_dom_css_style_sheet_add_rule (
+ WEBKIT_DOM_CSS_STYLE_SHEET (sheet),
+ selector,
+ style,
+ webkit_dom_css_rule_list_get_length (
+ webkit_dom_css_style_sheet_get_css_rules (
+ WEBKIT_DOM_CSS_STYLE_SHEET (sheet))), /* Index */
+ NULL);
+}
+
+static void
+add_css_rule_into_style_sheet_recursive (WebKitDOMDocument *document,
+ const gchar *style_sheet_id,
+ const gchar *selector,
+ const gchar *style)
+{
+ WebKitDOMNodeList *frames;
+ gint ii, length;
+
+ /* Add rule to document */
+ add_css_rule_into_style_sheet (
+ document,
+ style_sheet_id,
+ selector,
+ style);
+
+ frames = webkit_dom_document_query_selector_all (document, "iframe", NULL);
+ length = webkit_dom_node_list_get_length (frames);
+
+ /* Add rules to every sub document */
+ for (ii = 0; ii < length; ii++) {
+ WebKitDOMDocument *iframe_document;
+ WebKitDOMNode *node;
+
+ node = webkit_dom_node_list_item (frames, ii);
+ iframe_document = webkit_dom_html_iframe_element_get_content_document (
+ WEBKIT_DOM_HTML_IFRAME_ELEMENT (node));
+
+ add_css_rule_into_style_sheet_recursive (
+ iframe_document,
+ style_sheet_id,
+ selector,
+ style);
+ }
+}
+
+/**
+ * e_web_view_add_css_rule_into_style_sheet:
+ * @web_view: an #EWebView
+ * @style_sheet_id: CSS style sheet's id
+ * @selector: CSS selector
+ * @style: style for given selector
+ *
+ * Insert new CSS rule (defined with @selector and @style) into CSS style sheet
+ * with given @style_sheet_id. If style sheet doesn't exist, it's created.
+ *
+ * The rule is inserted to every DOM document that is in page. That means also into
+ * DOM documents inside iframe elements.
+ **/
+void
+e_web_view_add_css_rule_into_style_sheet (EWebView *view,
+ const gchar *style_sheet_id,
+ const gchar *selector,
+ const gchar *style)
+{
+ g_return_if_fail (E_IS_WEB_VIEW (view));
+ g_return_if_fail (style_sheet_id && *style_sheet_id);
+ g_return_if_fail (selector && *selector);
+ g_return_if_fail (style && *style);
+
+ add_css_rule_into_style_sheet_recursive (
+ webkit_web_view_get_dom_document (WEBKIT_WEB_VIEW (view)),
+ style_sheet_id,
+ selector,
+ style);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-29 00:34:21 +0800