[epiphany] Move code to get application icon from DOM to ephy-dom-utils

[Xan Lopez <xan src gnome org>]

commit b5b4d3a8680ac4b7c7358af782cc823213b412bc
Author: Manuel Rego Casasnovas <rego igalia com>
Date:   Mon Feb 25 14:17:11 2013 +0100

    Move code to get application icon from DOM to ephy-dom-utils
    
    https://bugzilla.gnome.org/show_bug.cgi?id=694091

 lib/ephy-web-app-utils.c |  230 ----------------------------------------------
 lib/ephy-web-app-utils.h |    4 -
 lib/ephy-web-dom-utils.c |  223 ++++++++++++++++++++++++++++++++++++++++++++
 lib/ephy-web-dom-utils.h |    5 +
 src/window-commands.c    |   33 ++++++-
 5 files changed, 258 insertions(+), 237 deletions(-)
---
diff --git a/lib/ephy-web-app-utils.c b/lib/ephy-web-app-utils.c
index e12649a..9f23fb8 100644
--- a/lib/ephy-web-app-utils.c
+++ b/lib/ephy-web-app-utils.c
@@ -35,236 +35,6 @@
 
 #define EPHY_WEB_APP_DESKTOP_FILE_PREFIX "epiphany-"
 
-static char *
-resolve_uri (WebKitWebView *view,
-             const char    *uri)
-{
-  SoupURI *base;
-  SoupURI *new;
-  const char *base_uri;
-  char *ret;
-
-  if (uri == NULL)
-    return NULL;
-
-  base_uri = webkit_web_view_get_uri (view);
-  if (base_uri == NULL)
-    return NULL;
-
-  base = soup_uri_new (base_uri);
-  new = soup_uri_new_with_base (base, uri);
-  soup_uri_free (base);
-  ret = soup_uri_to_string (new, FALSE);
-  soup_uri_free (new);
-
-  return ret;
-}
-
-#ifdef HAVE_WEBKIT2
-/* TODO: DOM Bindindgs */
-#else
-static gboolean
-get_icon_from_mstile (WebKitWebView *view,
-                      char         **uri_out,
-                      char         **color_out)
-{
-  gboolean ret;
-  WebKitDOMDocument *document;
-  WebKitDOMNodeList *metas;
-  gulong length, i;
-  char *image = NULL;
-  char *color = NULL;
-
-  document = webkit_web_view_get_dom_document (view);
-  metas = webkit_dom_document_get_elements_by_tag_name (document, "meta");
-  length = webkit_dom_node_list_get_length (metas);
-
-  for (i = 0; i < length; i++) {
-    WebKitDOMNode *node = webkit_dom_node_list_item (metas, i);
-    char *name;
-
-    name = webkit_dom_html_meta_element_get_name (WEBKIT_DOM_HTML_META_ELEMENT (node));
-    if (g_strcmp0 (name, "msapplication-TileImage") == 0) {
-      if (image == NULL)
-        image = webkit_dom_html_meta_element_get_content (WEBKIT_DOM_HTML_META_ELEMENT (node));
-    } else if (g_strcmp0 (name, "msapplication-TileColor") == 0) {
-      if (color == NULL)
-        color = webkit_dom_html_meta_element_get_content (WEBKIT_DOM_HTML_META_ELEMENT (node));
-    }
-  }
-
-  ret = (image != NULL && *image != '\0');
-
-  if (uri_out != NULL)
-    *uri_out = g_strdup (image);
-  if (color_out != NULL)
-    *color_out = g_strdup (color);
-
-  g_free (image);
-  g_free (color);
-
-  return ret;
-}
-
-static gboolean
-get_icon_from_ogp (WebKitWebView *view,
-                   char         **uri_out,
-                   char         **color_out)
-{
-  gboolean ret;
-  WebKitDOMDocument *document;
-  WebKitDOMNodeList *metas;
-  gulong length, i;
-  char *image = NULL;
-  char *color = NULL;
-
-  document = webkit_web_view_get_dom_document (view);
-  metas = webkit_dom_document_get_elements_by_tag_name (document, "meta");
-  length = webkit_dom_node_list_get_length (metas);
-
-  for (i = 0; i < length && image == NULL; i++) {
-    WebKitDOMNode *node = webkit_dom_node_list_item (metas, i);
-    char *property;
-    char *itemprop;
-
-    property = webkit_dom_element_get_attribute (WEBKIT_DOM_ELEMENT (node), "property");
-    itemprop = webkit_dom_element_get_attribute (WEBKIT_DOM_ELEMENT (node), "itemprop");
-    if (g_strcmp0 (property, "og:image") == 0 ||
-        g_strcmp0 (itemprop, "image") == 0) {
-      image = webkit_dom_html_meta_element_get_content (WEBKIT_DOM_HTML_META_ELEMENT (node));
-    }
-    g_free (property);
-    g_free (itemprop);
-  }
-
-  ret = (image != NULL && *image != '\0');
-
-  if (uri_out != NULL)
-    *uri_out = g_strdup (image);
-  if (color_out != NULL)
-    *color_out = g_strdup (color);
-
-  return ret;
-}
-
-static gboolean
-get_icon_from_touch_icon (WebKitWebView *view,
-                          char         **uri_out,
-                          char         **color_out)
-{
-  gboolean ret;
-  WebKitDOMDocument *document;
-  WebKitDOMNodeList *links;
-  gulong length, i;
-  char *image = NULL;
-  char *color = NULL;
-
-  document = webkit_web_view_get_dom_document (view);
-  links = webkit_dom_document_get_elements_by_tag_name (document, "link");
-  length = webkit_dom_node_list_get_length (links);
-
-  for (i = 0; i < length && image == NULL; i++) {
-    char *rel;
-    WebKitDOMNode *node = webkit_dom_node_list_item (links, i);
-
-    rel = webkit_dom_html_link_element_get_rel (WEBKIT_DOM_HTML_LINK_ELEMENT (node));
-    /* TODO: support more than one possible icon. */
-    if (g_strcmp0 (rel, "apple-touch-icon") == 0 ||
-        g_strcmp0 (rel, "apple-touch-icon-precomposed") == 0) {
-      image = webkit_dom_html_link_element_get_href (WEBKIT_DOM_HTML_LINK_ELEMENT (node));
-    }
-    g_free (rel);
-  }
-
-  ret = (image != NULL && *image != '\0');
-
-  if (uri_out != NULL)
-    *uri_out = g_strdup (image);
-  if (color_out != NULL)
-    *color_out = g_strdup (color);
-
-  return ret;
-}
-
-static gboolean
-get_icon_from_favicon (WebKitWebView *view,
-                       char         **uri_out,
-                       char         **color_out)
-{
-  gboolean ret;
-  WebKitDOMDocument *document;
-  WebKitDOMNodeList *links;
-  gulong length, i;
-  char *image = NULL;
-  char *color = NULL;
-
-  document = webkit_web_view_get_dom_document (view);
-  links = webkit_dom_document_get_elements_by_tag_name (document, "link");
-  length = webkit_dom_node_list_get_length (links);
-
-  for (i = 0; i < length; i++) {
-    char *rel;
-    WebKitDOMNode *node = webkit_dom_node_list_item (links, i);
-
-    rel = webkit_dom_html_link_element_get_rel (WEBKIT_DOM_HTML_LINK_ELEMENT (node));
-    if (g_strcmp0 (rel, "shortcut-icon") == 0 ||
-        g_strcmp0 (rel, "shortcut icon") == 0 ||
-        g_strcmp0 (rel, "SHORTCUT ICON") == 0 ||
-        g_strcmp0 (rel, "Shortcut Icon") == 0 ||
-        g_strcmp0 (rel, "icon shortcut") == 0 ||
-        g_strcmp0 (rel, "icon") == 0) {
-      image = webkit_dom_html_link_element_get_href (WEBKIT_DOM_HTML_LINK_ELEMENT (node));
-    }
-    g_free (rel);
-  }
-
-  ret = (image != NULL && *image != '\0');
-
-  if (uri_out != NULL)
-    *uri_out = g_strdup (image);
-  if (color_out != NULL)
-    *color_out = g_strdup (color);
-
-  return ret;
-}
-#endif /* HAVE_WEBKIT2 */
-
-gboolean
-ephy_web_view_get_best_icon (WebKitWebView *view,
-                             char         **uri,
-                             GdkRGBA       *rgba)
-{
-  gboolean ret = FALSE;
-  char *image = NULL;
-  char *color = NULL;
-
-#ifdef HAVE_WEBKIT2
-  /* TODO: DOM Bindindgs */
-#else
-
-  /* First try to get a mstile, then try OGP, then favicon */
-
-  ret = get_icon_from_mstile (view, &image, &color);
-  if (! ret)
-    ret = get_icon_from_ogp (view, &image, &color);
-  if (! ret)
-    ret = get_icon_from_touch_icon (view, &image, &color);
-  if (! ret)
-    ret = get_icon_from_favicon (view, &image, &color);
-
-#endif
-
-  if (uri != NULL)
-    *uri = resolve_uri (view, image);
-  if (rgba != NULL && color != NULL)
-    gdk_rgba_parse (rgba, color);
-
-  g_free (image);
-  g_free (color);
-
-  return ret;
-}
-
 /* This is necessary because of gnome-shell's guessing of a .desktop
    filename from WM_CLASS property. */
 static char *
diff --git a/lib/ephy-web-app-utils.h b/lib/ephy-web-app-utils.h
index adb254e..adc2acd 100644
--- a/lib/ephy-web-app-utils.h
+++ b/lib/ephy-web-app-utils.h
@@ -58,10 +58,6 @@ void     ephy_web_application_free_application_list (GList *list);
 
 gboolean ephy_web_application_exists (const char *name);
 
-gboolean ephy_web_view_get_best_icon (WebKitWebView *view,
-                                      char         **uri,
-                                      GdkRGBA       *rgba);
-
 G_END_DECLS
 
 #endif
diff --git a/lib/ephy-web-dom-utils.c b/lib/ephy-web-dom-utils.c
index 184cf67..375a7be 100644
--- a/lib/ephy-web-dom-utils.c
+++ b/lib/ephy-web-dom-utils.c
@@ -22,6 +22,7 @@
 #include "config.h"
 #include "ephy-web-dom-utils.h"
 
+#include <libsoup/soup.h>
 #ifdef HAVE_WEBKIT2
 #include <webkit2/webkit2.h>
 #include <webkit2/webkit-web-extension.h>
@@ -131,3 +132,225 @@ ephy_web_dom_utils_get_application_title (WebKitDOMDocument *document)
 
   return title;
 }
+
+static char *
+resolve_uri (const char *base_uri,
+             const char *uri)
+{
+  SoupURI *base;
+  SoupURI *new;
+  char *ret;
+
+  if (uri == NULL)
+    return NULL;
+
+  if (base_uri == NULL)
+    return NULL;
+
+  base = soup_uri_new (base_uri);
+  new = soup_uri_new_with_base (base, uri);
+  soup_uri_free (base);
+  ret = soup_uri_to_string (new, FALSE);
+  soup_uri_free (new);
+
+  return ret;
+}
+
+static gboolean
+get_icon_from_mstile (WebKitDOMDocument *document,
+                      char              **uri_out,
+                      char              **color_out)
+{
+  gboolean ret;
+  WebKitDOMNodeList *metas;
+  gulong length, i;
+  char *image = NULL;
+  char *color = NULL;
+
+  metas = webkit_dom_document_get_elements_by_tag_name (document, "meta");
+  length = webkit_dom_node_list_get_length (metas);
+
+  for (i = 0; i < length; i++) {
+    WebKitDOMNode *node = webkit_dom_node_list_item (metas, i);
+    char *name;
+
+    name = webkit_dom_html_meta_element_get_name (WEBKIT_DOM_HTML_META_ELEMENT (node));
+    if (g_strcmp0 (name, "msapplication-TileImage") == 0) {
+      if (image == NULL)
+        image = webkit_dom_html_meta_element_get_content (WEBKIT_DOM_HTML_META_ELEMENT (node));
+    } else if (g_strcmp0 (name, "msapplication-TileColor") == 0) {
+      if (color == NULL)
+        color = webkit_dom_html_meta_element_get_content (WEBKIT_DOM_HTML_META_ELEMENT (node));
+    }
+  }
+
+  ret = (image != NULL && *image != '\0');
+
+  if (uri_out != NULL)
+    *uri_out = g_strdup (image);
+  if (color_out != NULL)
+    *color_out = g_strdup (color);
+
+  g_free (image);
+  g_free (color);
+
+  return ret;
+}
+
+static gboolean
+get_icon_from_ogp (WebKitDOMDocument *document,
+                   char         **uri_out,
+                   char         **color_out)
+{
+  gboolean ret;
+  WebKitDOMNodeList *metas;
+  gulong length, i;
+  char *image = NULL;
+  char *color = NULL;
+
+  metas = webkit_dom_document_get_elements_by_tag_name (document, "meta");
+  length = webkit_dom_node_list_get_length (metas);
+
+  for (i = 0; i < length && image == NULL; i++) {
+    WebKitDOMNode *node = webkit_dom_node_list_item (metas, i);
+    char *property;
+    char *itemprop;
+
+    property = webkit_dom_element_get_attribute (WEBKIT_DOM_ELEMENT (node), "property");
+    itemprop = webkit_dom_element_get_attribute (WEBKIT_DOM_ELEMENT (node), "itemprop");
+    if (g_strcmp0 (property, "og:image") == 0 ||
+        g_strcmp0 (itemprop, "image") == 0) {
+      image = webkit_dom_html_meta_element_get_content (WEBKIT_DOM_HTML_META_ELEMENT (node));
+    }
+    g_free (property);
+    g_free (itemprop);
+  }
+
+  ret = (image != NULL && *image != '\0');
+
+  if (uri_out != NULL)
+    *uri_out = g_strdup (image);
+  if (color_out != NULL)
+    *color_out = g_strdup (color);
+
+  return ret;
+}
+
+static gboolean
+get_icon_from_touch_icon (WebKitDOMDocument *document,
+                          char         **uri_out,
+                          char         **color_out)
+{
+  gboolean ret;
+  WebKitDOMNodeList *links;
+  gulong length, i;
+  char *image = NULL;
+  char *color = NULL;
+
+  links = webkit_dom_document_get_elements_by_tag_name (document, "link");
+  length = webkit_dom_node_list_get_length (links);
+
+  for (i = 0; i < length && image == NULL; i++) {
+    char *rel;
+    WebKitDOMNode *node = webkit_dom_node_list_item (links, i);
+
+    rel = webkit_dom_html_link_element_get_rel (WEBKIT_DOM_HTML_LINK_ELEMENT (node));
+    /* TODO: support more than one possible icon. */
+    if (g_strcmp0 (rel, "apple-touch-icon") == 0 ||
+        g_strcmp0 (rel, "apple-touch-icon-precomposed") == 0) {
+      image = webkit_dom_html_link_element_get_href (WEBKIT_DOM_HTML_LINK_ELEMENT (node));
+    }
+    g_free (rel);
+  }
+
+  ret = (image != NULL && *image != '\0');
+
+  if (uri_out != NULL)
+    *uri_out = g_strdup (image);
+  if (color_out != NULL)
+    *color_out = g_strdup (color);
+
+  return ret;
+}
+
+static gboolean
+get_icon_from_favicon (WebKitDOMDocument *document,
+                       char         **uri_out,
+                       char         **color_out)
+{
+  gboolean ret;
+  WebKitDOMNodeList *links;
+  gulong length, i;
+  char *image = NULL;
+  char *color = NULL;
+
+  links = webkit_dom_document_get_elements_by_tag_name (document, "link");
+  length = webkit_dom_node_list_get_length (links);
+
+  for (i = 0; i < length; i++) {
+    char *rel;
+    WebKitDOMNode *node = webkit_dom_node_list_item (links, i);
+
+    rel = webkit_dom_html_link_element_get_rel (WEBKIT_DOM_HTML_LINK_ELEMENT (node));
+    if (g_strcmp0 (rel, "shortcut-icon") == 0 ||
+        g_strcmp0 (rel, "shortcut icon") == 0 ||
+        g_strcmp0 (rel, "SHORTCUT ICON") == 0 ||
+        g_strcmp0 (rel, "Shortcut Icon") == 0 ||
+        g_strcmp0 (rel, "icon shortcut") == 0 ||
+        g_strcmp0 (rel, "icon") == 0) {
+      image = webkit_dom_html_link_element_get_href (WEBKIT_DOM_HTML_LINK_ELEMENT (node));
+    }
+    g_free (rel);
+  }
+
+  ret = (image != NULL && *image != '\0');
+
+  if (uri_out != NULL)
+    *uri_out = g_strdup (image);
+  if (color_out != NULL)
+    *color_out = g_strdup (color);
+
+  return ret;
+}
+
+/**
+ * ephy_web_dom_utils_get_best_icon:
+ * @document: the DOM document.
+ * @base_uri: base URI of the #WebKitWebView.
+ * @uri_out: Icon URI.
+ * @color_out: Icon background color.
+ *
+ * Tries to get the icon (and its background color if any) for a web application
+ * from the @document meta data. First try to get a mstile, then OGP, then touch
+ * icon and finally favicon.
+ *
+ * Returns %TRUE if it finds an icon in the @document.
+ **/
+gboolean
+ephy_web_dom_utils_get_best_icon (WebKitDOMDocument *document,
+                                  const char        *base_uri,
+                                  char             **uri_out,
+                                  char             **color_out)
+{
+  gboolean ret = FALSE;
+  char *image = NULL;
+  char *color = NULL;
+
+  ret = get_icon_from_mstile (document, &image, &color);
+  if (! ret)
+    ret = get_icon_from_ogp (document, &image, &color);
+  if (! ret)
+    ret = get_icon_from_touch_icon (document, &image, &color);
+  if (! ret)
+    ret = get_icon_from_favicon (document, &image, &color);
+
+  if (uri_out != NULL)
+    *uri_out = resolve_uri (base_uri, image);
+  if (color_out != NULL)
+    *color_out = g_strdup (color);
+
+  g_free (image);
+  g_free (color);
+
+  return ret;
+}
diff --git a/lib/ephy-web-dom-utils.h b/lib/ephy-web-dom-utils.h
index d98344c..a998d4a 100644
--- a/lib/ephy-web-dom-utils.h
+++ b/lib/ephy-web-dom-utils.h
@@ -37,6 +37,11 @@ gboolean ephy_web_dom_utils_has_modified_forms (WebKitDOMDocument *document);
 
 char * ephy_web_dom_utils_get_application_title (WebKitDOMDocument *document);
 
+gboolean ephy_web_dom_utils_get_best_icon (WebKitDOMDocument *document,
+                                           const char        *base_uri,
+                                           char             **uri_out,
+                                           char             **color_out);
+
 G_END_DECLS
 
 #endif
diff --git a/src/window-commands.c b/src/window-commands.c
index c60f4df..d86ff06 100644
--- a/src/window-commands.c
+++ b/src/window-commands.c
@@ -658,6 +658,10 @@ download_icon_and_set_image (EphyApplicationDialogData *data)
 static void
 fill_default_application_image (EphyApplicationDialogData *data)
 {
+       WebKitDOMDocument *document;
+       const char *base_uri;
+       char *image = NULL;
+       char *color = NULL;
        gboolean res;
 
        data->icon_rgba.red = 0.5;
@@ -665,9 +669,32 @@ fill_default_application_image (EphyApplicationDialogData *data)
        data->icon_rgba.blue = 0.5;
        data->icon_rgba.alpha = 0.3;
 
-       res = ephy_web_view_get_best_icon (WEBKIT_WEB_VIEW (data->view),
-                                          &data->icon_href,
-                                          &data->icon_rgba);
+       base_uri = webkit_web_view_get_uri (WEBKIT_WEB_VIEW (data->view));
+
+#ifdef HAVE_WEBKIT2
+       /* TODO use web extension to get image and color */
+       res = FALSE;
+#else
+       document = webkit_web_view_get_dom_document (WEBKIT_WEB_VIEW (data->view));
+       res = ephy_web_dom_utils_get_best_icon (document,
+                                               base_uri,
+                                               &image,
+                                               &color);
+#endif
+
+       if (image != NULL)
+       {
+               data->icon_href = g_strdup (image);
+       }
+
+       if (color != NULL)
+       {
+               gdk_rgba_parse (&data->icon_rgba, color);
+       }
+
+       g_free (image);
+       g_free (color);
+
        if (res)
        {
                download_icon_and_set_image (data);