Use signals for selected images and text

The page widget shouldn't have to care what should be done with selected images
and text.
Signed-off-by: Sebastian Ramacher <sebastian+dev@ramacher.at>

callbacks.c

@@ -541,3 +541,42 @@ cb_unknown_command(girara_session_t* session, const char* input)
 
   return true;
 }
+
+void
+cb_page_widget_text_selected(ZathuraPage* page, const char* text, void* data)
+{
+  g_return_if_fail(page != NULL);
+  g_return_if_fail(text != NULL);
+  g_return_if_fail(data != NULL);
+
+  zathura_t* zathura = data;
+  GdkAtom* selection = get_selection(zathura);
+
+  /* copy to clipboard */
+  if (selection != NULL) {
+    gtk_clipboard_set_text(gtk_clipboard_get(*selection), text, -1);
+
+    char* stripped_text = g_strdelimit(g_strdup(text), "\n\t\r\n", ' ');
+    girara_notify(zathura->ui.session, GIRARA_INFO, _("Copied selected text to clipboard: %s"), stripped_text);
+    g_free(stripped_text);
+  }
+
+  g_free(selection);
+}
+
+void
+cb_page_widget_image_selected(ZathuraPage* page, GdkPixbuf* pixbuf, void* data)
+{
+  g_return_if_fail(page != NULL);
+  g_return_if_fail(pixbuf != NULL);
+  g_return_if_fail(data != NULL);
+
+  zathura_t* zathura = data;
+  GdkAtom* selection = get_selection(zathura);
+
+  if (selection != NULL) {
+    gtk_clipboard_set_image(gtk_clipboard_get(*selection), pixbuf);
+  }
+
+  g_free(selection);
+}

callbacks.h

@@ -202,4 +202,17 @@ void cb_setting_recolor_keep_hue_change(girara_session_t* session, const char* n
  */
 bool cb_unknown_command(girara_session_t* session, const char* input);
 
+/**
+ * Emitted when text has been selected in the page widget
+ *
+ * @param widget page view widget
+ * @param text selected text
+ * @param data user data
+ */
+void cb_page_widget_text_selected(ZathuraPage* page, const char* text,
+    void* data);
+
+void cb_page_widget_image_selected(ZathuraPage* page, GdkPixbuf* pixbuf,
+    void* data);
+
 #endif // CALLBACKS_H

page-widget.c

@@ -90,6 +90,14 @@ enum properties_e {
   PROP_LAST_VIEW,
 };
 
+enum {
+  TEXT_SELECTED,
+  IMAGE_SELECTED,
+  LAST_SIGNAL
+};
+
+static guint signals[LAST_SIGNAL] = { 0 };
+
 static void
 zathura_page_widget_class_init(ZathuraPageClass* class)
 {
@@ -135,6 +143,29 @@ zathura_page_widget_class_init(ZathuraPageClass* class)
                                   g_param_spec_boolean("draw-search-results", "draw-search-results", "Set to true if search results should be drawn", FALSE, G_PARAM_READABLE | G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS));
   g_object_class_install_property(object_class, PROP_LAST_VIEW,
                                   g_param_spec_int64("last-view", "last-view", "Last time the page has been viewed", -1, G_MAXINT64, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
+
+  /* add signals */
+  signals[TEXT_SELECTED] = g_signal_new("text-selected",
+      ZATHURA_TYPE_PAGE,
+      G_SIGNAL_RUN_LAST,
+      0,
+      NULL,
+      NULL,
+      g_cclosure_marshal_generic,
+      G_TYPE_NONE,
+      1,
+      G_TYPE_STRING);
+
+  signals[IMAGE_SELECTED] = g_signal_new("image-selected",
+      ZATHURA_TYPE_PAGE,
+      G_SIGNAL_RUN_LAST,
+      0,
+      NULL,
+      NULL,
+      g_cclosure_marshal_generic,
+      G_TYPE_NONE,
+      1,
+      G_TYPE_OBJECT);
 }
 
 static void
@@ -669,20 +700,8 @@ cb_zathura_page_widget_button_release_event(GtkWidget* widget, GdkEventButton* b
       char* text = zathura_page_get_text(priv->page, tmp, NULL);
       if (text != NULL) {
         if (strlen(text) > 0) {
-          GdkAtom* selection = get_selection(priv->zathura);
-
-          /* copy to clipboard */
-          if (selection != NULL) {
-            gtk_clipboard_set_text(gtk_clipboard_get(*selection), text, -1);
-          }
-
-          if (priv->page != NULL && document != NULL && priv->zathura != NULL) {
-            char* stripped_text = g_strdelimit(g_strdup(text), "\n\t\r\n", ' ');
-            girara_notify(priv->zathura->ui.session, GIRARA_INFO, _("Copied selected text to clipboard: %s"), stripped_text);
-            g_free(stripped_text);
-          }
-
-          g_free(selection);
+          /* emit text-selected signal */
+          g_signal_emit(ZATHURA_PAGE(widget), signals[TEXT_SELECTED], 0, text);
         }
 
         g_free(text);
@@ -837,14 +856,9 @@ cb_menu_image_copy(GtkMenuItem* item, ZathuraPage* page)
   GdkPixbuf* pixbuf = gdk_pixbuf_get_from_drawable(NULL, pixmap, NULL, 0, 0, 0,
                       0, width, height);
 
-  GdkAtom* selection = get_selection(priv->zathura);
-
-  if (selection != NULL) {
-    gtk_clipboard_set_image(gtk_clipboard_get(*selection), pixbuf);
-    gtk_clipboard_set_image(gtk_clipboard_get(*selection), pixbuf);
-  }
+  g_signal_emit(page, signals[IMAGE_SELECTED], 0, pixbuf);
+  g_object_unref(pixbuf);
 
-  g_free(selection);
   /* reset */
   priv->images.current = NULL;
 #endif

page-widget.h

@@ -4,6 +4,7 @@
 #define PAGE_WIDGET_H
 
 #include <gtk/gtk.h>
+#include "types.h"
 #include "document.h"
 
 /**
@@ -14,9 +15,6 @@
  * Before the properties contain the correct values, 'draw-links' has to be set
  * to TRUE at least one time.
  * */
-typedef struct zathura_page_widget_s ZathuraPage;
-typedef struct zathura_page_widget_class_s ZathuraPageClass;
-
 struct zathura_page_widget_s
 {
   GtkDrawingArea parent;

types.h

@@ -15,6 +15,11 @@ typedef struct zathura_document_s zathura_document_t;
  * Page
  */
 typedef struct zathura_page_s zathura_page_t;
+/**
+ * Page widget
+ */
+typedef struct zathura_page_widget_s ZathuraPage;
+typedef struct zathura_page_widget_class_s ZathuraPageClass;
 /**
  * Zathura
  */

zathura.c

@@ -736,6 +736,11 @@ document_open(zathura_t* zathura, const char* path, const char* password,
     page_calc_height_width(page, &page_height, &page_width, true);
 
     gtk_widget_set_size_request(page_widget, page_width, page_height);
+
+    g_signal_connect(G_OBJECT(page_widget), "text-selected",
+        G_CALLBACK(cb_page_widget_text_selected), zathura);
+    g_signal_connect(G_OBJECT(page_widget), "image-selected",
+        G_CALLBACK(cb_page_widget_text_selected), zathura);
   }
 
   /* view mode */