Add click-to-load functionality for blocked plugins.

webkit/glue/plugins/webview_plugin.h

+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef WEBKIT_GLUE_PLUGINS_WEBVIEW_PLUGIN_H_
+#define WEBKIT_GLUE_PLUGINS_WEBVIEW_PLUGIN_H_
+
+#include "base/scoped_ptr.h"
+#include "base/task.h"
+#include "third_party/WebKit/WebKit/chromium/public/WebCursorInfo.h"
+#include "third_party/WebKit/WebKit/chromium/public/WebPlugin.h"
+#include "third_party/WebKit/WebKit/chromium/public/WebFrameClient.h"
+#include "third_party/WebKit/WebKit/chromium/public/WebViewClient.h"
+
+// This class implements the WebPlugin interface by forwarding drawing and
+// handling input events to a WebView.
+// It can be used as a placeholder for an actual plugin, using HTML for the UI.
+// To show HTML data inside the WebViewPlugin,
+// call web_view->mainFrame()->loadHTMLString() with the HTML data and a fake
+// chrome:// URL as origin.
+
+class WebViewPlugin: public WebKit::WebPlugin, public WebKit::WebViewClient,
+                     public WebKit::WebFrameClient {
+ public:
+  class Delegate {
+   public:
+    // Bind |frame| to a Javascript object, enabling the delegate to receive
+    // callback methods from Javascript inside the WebFrame.
+    // This method is called from WebFrameClient::didClearWindowObject.
+    virtual void BindWebFrame(WebKit::WebFrame* frame) = 0;
+
+    // Called before the WebViewPlugin is destroyed. The delegate should delete
+    // itself here.
+    virtual void WillDestroyPlugin() = 0;
+  };
+
+  explicit WebViewPlugin(Delegate* delegate);
+
+  virtual WebKit::WebView* web_view() { return web_view_; }
+
+  virtual WebKit::WebPluginContainer* container() { return container_; }
+
+  // WebPlugin methods:
+  virtual bool initialize(WebKit::WebPluginContainer*);
+  virtual void destroy();
+
+  virtual NPObject* scriptableObject() { return NULL; }
+
+  virtual void paint(WebKit::WebCanvas* canvas, const WebKit::WebRect& rect);
+
+  // Coordinates are relative to the containing window.
+  virtual void updateGeometry(
+      const WebKit::WebRect& frame_rect, const WebKit::WebRect& clip_rect,
+      const WebKit::WebVector<WebKit::WebRect>& cut_out_rects, bool is_visible);
+
+  virtual void updateFocus(bool) { }
+  virtual void updateVisibility(bool) { }
+
+  virtual bool acceptsInputEvents() { return true; }
+  virtual bool handleInputEvent(const WebKit::WebInputEvent& event,
+                                WebKit::WebCursorInfo& cursor_info);
+
+  virtual void didReceiveResponse(const WebKit::WebURLResponse& response) { }
+  virtual void didReceiveData(const char* data, int data_length) { }
+  virtual void didFinishLoading() { }
+  virtual void didFailLoading(const WebKit::WebURLError& error) { }
+
+  // Called in response to WebPluginContainer::loadFrameRequest
+  virtual void didFinishLoadingFrameRequest(
+      const WebKit::WebURL& url, void* notifyData) { }
+  virtual void didFailLoadingFrameRequest(const WebKit::WebURL& url,
+                                          void* notify_data,
+                                          const WebKit::WebURLError& error) { }
+
+  // WebViewClient methods:
+  virtual bool acceptsLoadDrops() { return false; }
+
+  virtual void startDragging(const WebKit::WebDragData& drag_data,
+                             WebKit::WebDragOperationsMask mask,
+                             const WebKit::WebImage& image,
+                             const WebKit::WebPoint& point);
+
+  // WebWidgetClient methods:
+  virtual void didInvalidateRect(const WebKit::WebRect&);
+  virtual void didChangeCursor(const WebKit::WebCursorInfo& cursor);
+
+  // WebFrameClient methods:
+  virtual void didClearWindowObject(WebKit::WebFrame* frame);
+
+  virtual bool canHandleRequest(WebKit::WebFrame* frame,
+                                const WebKit::WebURLRequest& request);
+
+  virtual WebKit::WebURLError cancelledError(
+      WebKit::WebFrame* frame, const WebKit::WebURLRequest& request);
+
+ private:
+  friend class DeleteTask<WebViewPlugin>;
+  virtual ~WebViewPlugin();
+
+  Delegate* delegate_;
+  WebKit::WebCursorInfo current_cursor_;
+  WebKit::WebPluginContainer* container_;
+  WebKit::WebView* web_view_;
+  gfx::Rect rect_;
+};
+
+#endif  // WEBKIT_GLUE_PLUGINS_WEBVIEW_PLUGIN_H_