yelp-view: Implement web extension to load resources

I have split the libyelp library into two parts in order to avoid linking the webextension against libyelp. So now we have a libyelpuri with the yelp-uri, yelp-build-uri and their dependecies and the old libyelp with the remaining files. I have modified the yelp-build-uri logic to not have to use yelp-document because it implies to have to add to the new library most of libyelp classes.

2 files changed, 92 insertions, 3 deletions

diff --git a/libyelp/web-extension/Makefile.am b/libyelp/web-extension/Makefile.am
index 0cafe7af..62774d5e 100644
--- a/libyelp/web-extension/Makefile.am
+++ b/libyelp/web-extension/Makefile.am
@@ -3,6 +3,13 @@ webextension_LTLIBRARIES = libyelpwebextension.la
 webextensiondir = $(pkglibdir)/web-extensions
 
 libyelpwebextension_la_SOURCES = yelp-web-extension.c
-libyelpwebextension_la_CFLAGS = $(YELP_EXTENSION_CFLAGS)
-libyelpwebextension_la_LIBADD = $(YELP_EXTENSION_LIBS)
-libyelpwebextension_la_LDFLAGS = -module -avoid-version -no-undefined
+
+libyelpwebextension_la_CFLAGS = \
+	$(YELP_EXTENSION_CFLAGS)    \
+	-I$(top_srcdir)/libyelp
+
+libyelpwebextension_la_LIBADD =  \
+	$(YELP_EXTENSION_LIBS)       \
+	$(top_builddir)/libyelp/libyelpcommon.la
+
+libyelpwebextension_la_LDFLAGS = -module -avoid-version -no-undefined
\ No newline at end of file
diff --git a/libyelp/web-extension/yelp-web-extension.c b/libyelp/web-extension/yelp-web-extension.c
index 76ef1158..701cfbc2 100644
--- a/libyelp/web-extension/yelp-web-extension.c
+++ b/libyelp/web-extension/yelp-web-extension.c
@@ -20,10 +20,86 @@
 
 #include <webkit2/webkit-web-extension.h>
 #include <string.h>
+#include <stdlib.h>
+#include "yelp-uri.h"
+#include "yelp-uri-builder.h"
 
 #define WEBKIT_DOM_USE_UNSTABLE_API
 #include <webkitdom/WebKitDOMElementUnstable.h>
 
+static YelpUri *current_uri;
+
+static gchar *
+get_resource_path (gchar *uri, YelpUri *document_uri)
+{
+    gchar *resource = NULL;
+    gchar *resource_path = 0;
+
+    if (!g_str_has_prefix (uri, "ghelp") &&
+        !g_str_has_prefix (uri, "gnome-help") &&
+        !g_str_has_prefix (uri, "help")) {
+        return NULL;
+    }
+
+    resource = strstr (uri, "/");
+    if (resource) {
+        resource[0] = '\0';
+        resource++;
+    }
+
+    if (resource && resource[0] != '\0')
+        resource_path = yelp_uri_locate_file_uri (document_uri, resource);
+
+    return resource_path;
+}
+
+static gboolean
+web_page_send_request (WebKitWebPage     *web_page,
+                       WebKitURIRequest  *request,
+                       WebKitURIResponse *redirected_response,
+                       gpointer           user_data)
+{
+    const gchar *wk_uri = webkit_uri_request_get_uri (request);
+    gchar *yelp_uri, *current_uri_canonical, *file_path;
+
+    if (!current_uri)
+        return FALSE;
+
+    yelp_uri = build_yelp_uri (wk_uri);
+    current_uri_canonical = yelp_uri_get_canonical_uri (current_uri);
+
+    file_path = get_resource_path (yelp_uri, current_uri);
+
+    if (file_path) {
+        webkit_uri_request_set_uri (request, file_path);
+        g_free (file_path);
+    }
+
+    g_free (yelp_uri);
+    g_free (current_uri_canonical);
+    return FALSE;
+}
+
+static void
+web_page_notify_uri (WebKitWebPage *web_page,
+                     GParamSpec    *pspec,
+                     gpointer       data)
+{
+    const gchar *uri = webkit_web_page_get_uri (web_page);
+    gchar *yelp_uri;
+
+    yelp_uri = build_yelp_uri (uri);
+
+    if (current_uri)
+        g_object_unref (current_uri);
+    current_uri = yelp_uri_new (yelp_uri);
+
+    if (!yelp_uri_is_resolved (current_uri))
+        yelp_uri_resolve_sync (current_uri);
+
+    g_free (yelp_uri);
+}
+
 static gboolean
 web_page_context_menu (WebKitWebPage          *web_page,
                        WebKitContextMenu      *context_menu,
@@ -133,6 +209,12 @@ web_page_created_callback (WebKitWebExtension *extension,
     g_signal_connect (web_page, "context-menu",
                       G_CALLBACK (web_page_context_menu),
                       NULL);
+    g_signal_connect (web_page, "send-request",
+                      G_CALLBACK (web_page_send_request),
+                      NULL);
+    g_signal_connect (web_page, "notify::uri",
+                      G_CALLBACK (web_page_notify_uri),
+                      NULL);
 }
 
 G_MODULE_EXPORT void