soc.2009.webkitmessageview: afac9e19: Apparently I missed these in my previous...

tdrhq at soc.pidgin.im tdrhq at soc.pidgin.im
Tue Aug 25 12:03:58 EDT 2009


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Revision: afac9e1953739f4439b9907dcc941bf5ef457d7f
Ancestor: caf26362b3e2cf1b68af44d07d8b62d6486c29b2
Author: tdrhq at soc.pidgin.im
Date: 2009-08-07T18:27:41
Branch: im.pidgin.soc.2009.webkitmessageview
URL: http://d.pidgin.im/viewmtn/revision/info/afac9e1953739f4439b9907dcc941bf5ef457d7f

Added files:
        pidgin/gtkwebview.c pidgin/gtkwebview.h

ChangeLog: 

Apparently I missed these in my previous commit. 
Also changed the gtkwebview.h to be javadoc'ed.

-------------- next part --------------
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--- pidgin/gtkwebview.c	8a80ff617403f1c01ca8762c53ddc22de3df8092
+++ pidgin/gtkwebview.c	8a80ff617403f1c01ca8762c53ddc22de3df8092
@@ -0,0 +1,264 @@
+
+#include <ctype.h>
+#include <string.h>
+#include <glib.h>
+#include <glib/gstdio.h>
+#include <JavaScriptCore/JavaScript.h>
+
+#include "util.h"
+#include "gtkwebview.h"
+
+static WebKitWebViewClass *parent_class = NULL;
+
+GtkWidget* gtk_webview_new ()
+{
+	return GTK_WIDGET(g_object_new(gtk_webview_get_type(), NULL));
+}
+
+static char*
+get_img_filename_by_id (GtkWebView* view, int id)
+{
+	char *filename = NULL;
+	FILE *file;
+	PurpleStoredImage* img;
+
+	if (!view->images)
+		view->images = g_hash_table_new_full (g_direct_hash, g_direct_equal, NULL, g_free);
+	
+	filename = (char*) g_hash_table_lookup (view->images, GINT_TO_POINTER (id));
+	if (filename) return filename;
+			
+	/* else get from img store */
+	file = purple_mkstemp (&filename, TRUE);
+
+	img = purple_imgstore_find_by_id (id);
+
+	fwrite (purple_imgstore_get_data (img), purple_imgstore_get_size (img), 1, file);
+	g_hash_table_insert (view->images, GINT_TO_POINTER (id), filename);
+	fclose (file);
+	return filename;
+}
+
+static void 
+clear_single_image (gpointer key, gpointer value, gpointer userdata) 
+{
+	g_unlink ((char*) value);
+}
+
+static void
+clear_images (GtkWebView* view)
+{
+	if (!view->images) return;
+	g_hash_table_foreach (view->images, clear_single_image, NULL);
+	g_hash_table_unref (view->images);
+}
+
+/*
+ * Replace all <img id=""> tags with <img src="">. I hoped to never
+ * write any HTML parsing code, but I'm forced to do this, until 
+ * purple changes the way it works.
+ */
+static char*
+replace_img_id_with_src (GtkWebView *view, const char* html)
+{
+	GString *buffer = g_string_sized_new (strlen (html));
+	const char* cur = html;
+	char *id;
+	int nid;
+
+	while (*cur) {
+		const char* img = strstr (cur, "<img");
+		if (!img) {
+			g_string_append (buffer, cur);
+			break;
+		} else
+			g_string_append_len (buffer, cur, img - cur);
+
+		cur = strstr (img, "/>");
+		if (!cur)
+			cur = strstr (img, ">");
+
+		if (!cur) { /*oops, invalid html */
+			g_string_printf (buffer, "%s", html);
+			break;
+		}
+
+		if (strstr (img, "src=") || !strstr (img, "id=")) {
+			g_string_printf (buffer, "%s", html);
+			break;
+		}
+
+		/* now I _kinda_ know that it has an id=, and does not have a src= */
+		/* todo: take care of src= and id= appearing in strings? */
+		id = strstr (img, "id=") + 3; 
+
+		/* *id can't be \0, since a ">" appears after this */
+		if (isdigit (*id)) 
+			nid = atoi (id);
+		else 
+			nid = atoi (id+1);
+
+		/* let's dump this, tag and then dump the src information */
+		g_string_append_len (buffer, img, cur - img);
+
+		g_string_append_printf (buffer, " src='file://%s' ", get_img_filename_by_id (view, nid));
+	}
+	return g_string_free (buffer, FALSE);
+}
+
+static void
+gtk_webview_finalize (GObject *view)
+{
+	clear_images (GTK_WEBVIEW (view));
+	G_OBJECT_CLASS (parent_class)->finalize (G_OBJECT(view));
+}
+
+static void
+gtk_webview_class_init (GtkWebViewClass *klass, gpointer userdata)
+{
+	parent_class = g_type_class_ref (webkit_web_view_get_type ());
+	G_OBJECT_CLASS (klass)->finalize = gtk_webview_finalize;
+}
+
+static gboolean
+webview_link_clicked (WebKitWebView *view,
+                     WebKitWebFrame *frame,
+                     WebKitNetworkRequest *request,
+                     WebKitWebNavigationAction *navigation_action,
+		      WebKitWebPolicyDecision *policy_decision)
+{
+	const gchar *uri;
+
+	uri = webkit_network_request_get_uri (request);
+
+	/* the gtk imhtml way was to create an idle cb, not sure
+	 * why, so right now just using purple_notify_uri directly */
+	purple_notify_uri (NULL, uri);
+	return TRUE;
+}
+
+char*
+gtk_webview_execute_script (GtkWebView *view, const char *script)
+{
+	JSStringRef js_script = JSStringCreateWithUTF8CString (script);
+	JSContextRef ctxt = webkit_web_frame_get_global_context (
+		webkit_web_view_get_main_frame (WEBKIT_WEB_VIEW (view))
+		);
+	JSValueRef ret = JSEvaluateScript (ctxt, js_script, NULL, NULL, 0, NULL);
+	JSStringRef ret_as_str = JSValueToStringCopy (ctxt, ret, NULL);
+
+	size_t cstr_len = JSStringGetMaximumUTF8CStringSize (ret_as_str);
+	char   *cstr = g_new0(char, cstr_len + 1);
+
+	JSStringGetUTF8CString (ret_as_str, cstr, cstr_len);
+
+	/* TODO: I'm not sure what, if at all, I need to free here! */
+	return cstr;
+}
+
+static void
+gtk_webview_init (GtkWebView *view, gpointer userdata)
+{
+	g_signal_connect (view, "navigation-policy-decision-requested",
+			  G_CALLBACK (webview_link_clicked),
+			  view);
+	view->empty = TRUE;
+}
+
+
+void
+gtk_webview_load_html_string_with_imgstore (GtkWebView* view, const char* html)
+{
+	char* html_imged;
+	
+	clear_images (view);
+	html_imged = replace_img_id_with_src (view, html);
+	printf ("%s\n", html_imged);
+	webkit_web_view_load_html_string (WEBKIT_WEB_VIEW (view), html_imged, "file:///");
+	g_free (html_imged);
+}
+
+/* taken from sean's webkit plugin */
+char *gtk_webview_quote_js_string(const char *text)
+{
+        GString *str = g_string_new("\"");
+        const char *cur = text;
+
+        while (cur && *cur) {
+                switch (*cur) {
+                case '\\':
+                        g_string_append(str, "\\\\");   
+                        break;
+                case '\"':
+                        g_string_append(str, "\\\"");
+                        break;
+                case '\r':
+                        g_string_append(str, "<br/>");
+                        break;
+                case '\n':
+                        break;
+                default:
+			g_string_append_c(str, *cur);
+		}
+		cur ++;
+	}
+	g_string_append_c (str, '"');
+	return g_string_free (str, FALSE);
+}
+
+
+/* this is a "hack", my plan is to eventually handle this 
+ * correctly using a signals and a plugin: the plugin will have
+ * the information as to what javascript function to call. It seems
+ * wrong to hardcode that here.
+ */
+void
+gtk_webview_append_html (GtkWebView* view, const char* html)
+{
+	char* escaped = gtk_webview_quote_js_string (html);
+	char* script = g_strdup_printf ("document.write(%s)", escaped);
+	printf ("script: %s\n", script);
+	webkit_web_view_execute_script (WEBKIT_WEB_VIEW (view), script);
+	view->empty = FALSE;
+	g_free (script);
+	g_free (escaped);
+}
+
+char*
+gtk_webview_get_markup (GtkWebView *view)
+{
+	return gtk_webview_execute_script (view, "document.body.innerHTML");
+}
+
+char*
+gtk_webview_get_text (GtkWebView *view)
+{
+	return gtk_webview_execute_script (view, "document.body.textContent");
+}
+
+gboolean gtk_webview_is_empty (GtkWebView *view)
+{
+	return view->empty;
+}
+
+GType gtk_webview_get_type ()
+{
+	static GType mview_type = 0;
+	if (!mview_type) {
+		static const GTypeInfo mview_info = {
+			sizeof (GtkWebViewClass),
+			NULL,
+			NULL,
+			(GClassInitFunc) gtk_webview_class_init,
+			NULL,
+			NULL,
+			sizeof (GtkWebView),
+			0,
+			(GInstanceInitFunc) gtk_webview_init,
+			NULL
+		};
+		mview_type = g_type_register_static(webkit_web_view_get_type (),
+				"GtkWebView", &mview_info, 0);
+	}
+	return mview_type;
+}
============================================================
--- pidgin/gtkwebview.h	880d9d0c7cebe81016a981c5ff5b0bd90a92dcd8
+++ pidgin/gtkwebview.h	880d9d0c7cebe81016a981c5ff5b0bd90a92dcd8
@@ -0,0 +1,146 @@
+/**
+ * @file gtkwebview.h Wrapper over the Gtk WebKitWebView component
+ * @ingroup pidgin
+ */
+
+/* Pidgin is the legal property of its developers, whose names are too numerous
+ * to list here.  Please refer to the COPYRIGHT file distributed with this
+ * source distribution.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02111-1301  USA
+ */
+
+#ifndef _PIDGIN_WEBVIEW_H_
+#define _PIDGIN_WEBVIEW_H_
+
+#include <glib.h>
+#include <gtk/gtk.h>
+#include <webkit/webkit.h>
+
+#include "notify.h"
+
+#define GTK_TYPE_WEBVIEW            (gtk_webview_get_type())
+#define GTK_WEBVIEW(obj)            (G_TYPE_CHECK_INSTANCE_CAST((obj), GTK_TYPE_WEBVIEW, GtkWebView))
+#define GTK_WEBVIEW_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST((klass), GTK_TYPE_WEBVIEW, GtkWebViewClass))
+#define GTK_IS_WEBVIEW(obj)         (G_TYPE_CHECK_INSTANCE_TYPE((obj), GTK_TYPE_WEBVIEW))
+#define GTK_IS_IMHTML_CLASS(klass)  (G_TYPE_CHECK_CLASS_TYPE((klass), GTK_TYPE_WEBVIEW))
+
+
+struct _GtkWebView
+{
+	WebKitWebView webkit_web_view;
+
+	/*< private >*/
+	GHashTable *images; /**< a map from id to temporary file for the image */
+	gboolean    empty;  /**< whether anything has been appended **/
+	char *script_return; /**< the last value returned from a script **/
+};
+
+typedef struct _GtkWebView GtkWebView;
+
+struct _GtkWebViewClass
+{
+	WebKitWebViewClass parent;
+};
+
+typedef struct _GtkWebViewClass GtkWebViewClass;
+
+
+/**
+ * Returns the GType for a GtkWebView widget
+ *
+ * @return the GType for GtkWebView widget
+ */
+GType gtk_webview_get_type ();
+
+/**
+ * Create a new GtkWebView object
+ *
+ * @return a GtkWidget corresponding to the GtkWebView object
+ */
+GtkWidget* gtk_webview_new ();
+
+/**
+ * A very basic routine to append html, which can be considered
+ * equivalent to a "document.write" using JavaScript.
+ *
+ * @param webview The GtkWebView object
+ * @param markup  The html markup to append
+ */
+void gtk_webview_append_html (GtkWebView *webview, const char* markup);
+
+/**
+ * Rather than use webkit_webview_load_string, this routine
+ * parses and displays the <img id=?> tags that make use of the
+ * Pidgin imgstore.
+ *
+ * @param webview The GtkWebView object
+ * @param html    The HTML content to load
+ */
+void gtk_webview_load_html_string_with_imgstore (GtkWebView* webview, const char* html);
+
+/**
+ * (To be changed, right now it just tests whether an append has been
+ * called since the last clear or since the Widget was created. So it
+ * does not test for load_string's called in between.
+ *
+ * @param webview The GtkWebView object
+ * 
+ * @return gboolean indicating whether the webview is empty.
+ */
+gboolean gtk_webview_is_empty (GtkWebView *webview);
+
+/**
+ * Executes javascript and returns the answer of the script
+ * formatted as string. The return value needs to be freed using
+ * g_free. If the return values is not required you may instead
+ * use webkit_web_view_execute_script.
+ *
+ * @param webview The GtkWebView object
+ * @param script  The JavaScript to execute
+ *
+ * @return the return value of the script.
+ */
+char* gtk_webview_execute_script (GtkWebView *webview, const char *script);
+
+/**
+ * Get the current contents of the GtkWebView object.
+ *
+ * @param webview The GtkWebView object
+ *
+ * @return a string with the contents. Needs to be g_free'd after use.
+ */
+char* gtk_webview_get_markup (GtkWebView *webview);
+
+/**
+ * Returns the contents of the GtkWebView object, stripped of markups
+ *
+ * @param webview The GtkWebView object
+ *
+ * @return a string with the contents. Needs to be g_free'd after use.
+ */
+char* gtk_webview_get_text (GtkWebView *view);
+
+/**
+ * A convenience routine to quote a string for use as a JavaScript 
+ * string. For instance, "hello 'world'" becomes "'hello \\'world\\''"
+ *
+ * @param str The string to escape and quote
+ *
+ * @return the quoted string.
+ */
+char* gtk_webview_quote_js_string (const char* str);
+
+#endif /* _PIDGIN_WEBVIEW_H_ */


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