From a4870960e5b906da9a52b58064501c405a217f16 Mon Sep 17 00:00:00 2001
From: Trever Fischer <tdfischer@fedoraproject.org>
Date: Fri, 23 Mar 2012 13:20:13 -0400
Subject: Save a thumbnail with every page load

---
 chrome/zeitgeist.js          | 24 +++++++++++++---
 npapi-plugin/np-zeitgeist.cc | 67 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 87 insertions(+), 4 deletions(-)

diff --git a/chrome/zeitgeist.js b/chrome/zeitgeist.js
index 4882dcc..82bcb01 100644
--- a/chrome/zeitgeist.js
+++ b/chrome/zeitgeist.js
@@ -1,6 +1,7 @@
 var plugin = document.embeds[0];
 var tabInfo = {};
 var tabIdTimeouts = {};
+var currentTabs = {};
 
 function onTabCreated (tab) {
 	chrome.tabs.executeScript(tab.id, {file: "content_script.js"});
@@ -39,10 +40,14 @@ function sendAccessEvent (documentInfo, tabid) {
 	}
 	var mimetype = documentInfo.mimeType;
 	var title = documentInfo.title;
-	plugin.insertEvent(url,
-	                   domain,
-	                   mimetype ? mimetype : "text/html",
-	                   title);
+  plugin.insertEvent(url,
+                     domain,
+                     mimetype ? mimetype : "text/html",
+                     title);
+  console.log("save thumbnail for "+currentTabs[tabid]+": "+url);
+  chrome.tabs.captureVisibleTab(currentTabs[tabid], {format:"jpeg", quality:5}, function(dataUrl) {
+      plugin.saveSnapshot(url, dataUrl);
+  });
 
 	documentInfo.sentAccess = true;
 	tabInfo[tabid] = documentInfo;
@@ -86,6 +91,17 @@ else plugin.setActor("application://chromium-browser.desktop");
 chrome.extension.onRequest.addListener (onExtensionRequest);
 //chrome.bookmarks.onCreated.addListener (onBookmarkCreated);
 chrome.tabs.onUpdated.addListener (onTabUpdated);
+chrome.tabs.onCreated.addListener(
+  function (tab) {
+    currentTabs[tab.id] = tab.windowId;
+  }
+);
+
+chrome.tabs.onRemoved.addListener(
+  function (tabid) {
+    delete currentTabs[tabid];
+  }
+);
 //chrome.tabs.onCreated.addListener (onTabCreated);
 //chrome.tabs.onRemoved.addListener (onTabRemoved);
 
diff --git a/npapi-plugin/np-zeitgeist.cc b/npapi-plugin/np-zeitgeist.cc
index 6c2c04a..0066ab0 100644
--- a/npapi-plugin/np-zeitgeist.cc
+++ b/npapi-plugin/np-zeitgeist.cc
@@ -51,6 +51,7 @@ hasMethod(NPObject* obj, NPIdentifier methodName) {
 
   if (!strcmp(name, "insertEvent")) return true;
   else if (!strcmp(name, "setActor")) return true;
+  else if (!strcmp(name, "saveSnapshot")) return true;
 
   return false;
 }
@@ -59,6 +60,7 @@ static bool
 invokeInsertEvent (NPObject *obj, const NPVariant *args, uint32_t argCount, NPVariant *result)
 {
   /* args should be: url, origin, mimetype, title, [interpretation] */
+  g_debug("Inserting event");
   char *url, *origin, *mimetype, *title;
   char *interpretation = NULL;
   const char *manifestation = NULL;
@@ -66,9 +68,11 @@ invokeInsertEvent (NPObject *obj, const NPVariant *args, uint32_t argCount, NPVa
   const NPString *np_s;
   ZeitgeistEvent *event;
 
+  g_debug("arg count: %d", argCount);
   if(argCount < 4 || argCount > 6)
   {
     npnfuncs->setexception(obj, "exception during invocation");
+    g_debug("too many or too few args");
     return false;
   }
 
@@ -144,6 +148,64 @@ invokeInsertEvent (NPObject *obj, const NPVariant *args, uint32_t argCount, NPVa
   return true;
 }
 
+static bool
+invokeSaveSnapshot (NPObject *obj, const NPVariant *args, uint32_t argCount, NPVariant *result)
+{
+  char *url;
+  char *screenshotURL = NULL;
+  const NPString *np_s;
+  np_s = &NPVARIANT_TO_STRING (args[0]);
+  url = g_strndup(np_s->UTF8Characters, np_s->UTF8Length);
+  np_s = &NPVARIANT_TO_STRING (args[1]);
+  screenshotURL = g_strndup(np_s->UTF8Characters, np_s->UTF8Length);
+
+  if (!screenshotURL)
+    return false;
+
+  gsize len = strlen(screenshotURL) - 22;
+  char *img = new char[len];
+  memset(img, 0, len);
+  memcpy(img, screenshotURL + 22, len);
+
+  // update thumbnail
+  gchar *thumbnail_path;
+  gchar *thumbnail_filename = NULL;
+  gchar *thumbnail_dir;
+  gchar *csum;
+
+  // create dir if it doesn't exist
+  thumbnail_dir = g_build_filename (g_get_home_dir (),
+      ".thumbnails",
+      "large",
+      NULL);
+  if (!g_file_test(thumbnail_dir, G_FILE_TEST_IS_DIR)) {
+    g_mkdir_with_parents (thumbnail_dir, 0755);
+  }
+  g_free (thumbnail_dir);
+
+  csum = g_compute_checksum_for_string (G_CHECKSUM_MD5, url, -1);
+
+  thumbnail_filename = g_strconcat (csum, ".png", NULL);
+  thumbnail_path = g_build_filename (g_get_home_dir (),
+      ".thumbnails",
+      "large",
+      thumbnail_filename,
+      NULL);
+  g_free (csum);
+
+  guchar *jpg_data = g_base64_decode(img, &len);
+
+  g_debug("Writing thumbnail to %s", thumbnail_path);
+  g_file_set_contents(thumbnail_path, (gchar*)jpg_data, len, NULL);
+
+  g_free (img);
+  g_free (jpg_data);
+  g_free (thumbnail_filename);
+  g_free (thumbnail_path);
+
+  return true;
+}
+
 static bool
 invokeSetActor (NPObject *obj, const NPVariant *args, uint32_t argCount, NPVariant *result)
 {
@@ -175,6 +237,7 @@ invoke(NPObject* obj, NPIdentifier methodName, const NPVariant *args, uint32_t a
 
   name = npnfuncs->utf8fromidentifier(methodName);
 
+  g_debug("Calling %s", name);
   if(name)
   {
     if (!strcmp (name, "insertEvent"))
@@ -185,6 +248,10 @@ invoke(NPObject* obj, NPIdentifier methodName, const NPVariant *args, uint32_t a
     {
       return invokeSetActor(obj, args, argCount, result);
     }
+    else if (!strcmp (name, "saveSnapshot"))
+    {
+      return invokeSaveSnapshot(obj, args, argCount, result);
+    }
   }
 
   npnfuncs->setexception(obj, "exception during invocation");
-- 
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