Linux: Initial scaffolding for default plugin.

webkit/default_plugin/plugin_impl_gtk.h

Index: webkit/default_plugin/plugin_impl_gtk.h
diff --git a/webkit/default_plugin/plugin_impl_gtk.h b/webkit/default_plugin/plugin_impl_gtk.h
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+// 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_DEFAULT_PLUGIN_PLUGIN_IMPL_GTK_H_
+#define WEBKIT_DEFAULT_PLUGIN_PLUGIN_IMPL_GTK_H_
+
+#include <string>
+#include <vector>
+
+#include <gtk/gtk.h>
+
+#include "gfx/native_widget_types.h"
+#include "third_party/npapi/bindings/npapi.h"
+
+// Possible plugin installer states.
+enum PluginInstallerState {
+  PluginInstallerStateUndefined,
+  PluginListDownloadInitiated,
+  PluginListDownloaded,
+  PluginListDownloadedPluginNotFound,
+  PluginListDownloadFailed,
+  PluginDownloadInitiated,
+  PluginDownloadCompleted,
+  PluginDownloadFailed,
+  PluginInstallerLaunchSuccess,
+  PluginInstallerLaunchFailure
+};
+
+class PluginInstallDialog;
+class PluginDatabaseHandler;
+
+// Provides the plugin installation functionality. This class is
+// instantiated with the information like the mime type of the
+// target plugin, the display mode, etc.
+class PluginInstallerImpl {
+ public:
+  // mode is the plugin instantiation mode, i.e. whether it is a full
+  // page plugin (NP_FULL) or an embedded plugin (NP_EMBED)
+  explicit PluginInstallerImpl(int16 mode);
+  virtual ~PluginInstallerImpl();
+
+  // Initializes the plugin with the instance information, mime type
+  // and the list of parameters passed down to the plugin from the webpage.
+  //
+  // Parameters:
+  // module_handle
+  //   The handle to the dll in which this object is instantiated.
+  // instance
+  //   The plugins opaque instance handle.
+  // mime_type
+  //   Identifies the third party plugin which would be eventually installed.
+  // argc
+  //   Indicates the count of arguments passed in from the webpage.
+  // argv
+  //   Pointer to the arguments.
+  // Returns true on success.
+  bool Initialize(void* module_handle, NPP instance, NPMIMEType mime_type,
+                  int16 argc, char* argn[], char* argv[]);
+
+  // Informs the plugin of its window information.
+  //
+  // Parameters:
+  // window_info
+  //   The window info passed to npapi.
+  bool NPP_SetWindow(NPWindow* window_info);
+
+  // Destroys the install dialog.
+  void Shutdown();
+
+  // Starts plugin download. Spawns the plugin installer after it is
+  // downloaded.
+  void DownloadPlugin();
+
+  // Indicates that the plugin download was cancelled.
+  void DownloadCancelled();
+
+  // Initializes the plugin download stream.
+  //
+  // Parameters:
+  // stream
+  //   Pointer to the new stream being created.
+  void NewStream(NPStream* stream);
+
+  // Uninitializes the plugin download stream.
+  //
+  // Parameters:
+  // stream
+  //   Pointer to the stream being destroyed.
+  // reason
+  //   Indicates why the stream is being destroyed.
+  //
+  void DestroyStream(NPStream* stream, NPError reason);
+
+  // Determines whether the plugin is ready to accept data.
+  // We only accept data when we have initiated a download for the plugin
+  // database.
+  //
+  // Parameters:
+  // stream
+  //   Pointer to the stream being destroyed.
+  // Returns true if the plugin is ready to accept data.
+  bool WriteReady(NPStream* stream);
+
+  // Delivers data to the plugin instance.
+  //
+  // Parameters:
+  // stream
+  //   Pointer to the stream being destroyed.
+  // offset
+  //   Indicates the data offset.
+  // buffer_length
+  //   Indicates the length of the data buffer.
+  // buffer
+  //   Pointer to the actual buffer.
+  // Returns the number of bytes actually written, 0 on error.
+  int32 Write(NPStream* stream, int32 offset, int32 buffer_length,
+              void* buffer);
+
+  // Handles notifications received in response to GetURLNotify calls issued
+  // by the plugin.
+  //
+  // Parameters:
+  // url
+  //   Pointer to the URL.
+  // reason
+  //   Describes why the notification was sent.
+  void URLNotify(const char* url, NPReason reason);
+
+  // Used by the renderer to indicate plugin install through the infobar.
+  int16 NPP_HandleEvent(void* event);
+
+  const std::string& mime_type() const { return mime_type_; }
+
+  // Replaces a resource string with the placeholder passed in as an argument
+  //
+  // Parameters:
+  // message_id_with_placeholders
+  //   The resource id of the string with placeholders. This is only used if
+  //   the placeholder string (the replacement_string) parameter is valid.
+  // message_id_without_placeholders
+  //   The resource id of the string to be returned if the placeholder is
+  //   empty.
+  // replacement_string
+  //   The placeholder which replaces tokens in the string identified by
+  //   resource id message_id_with_placeholders.
+  // Returns a string which has the placeholders replaced, or the string
+  // without placeholders.
+  static std::wstring ReplaceStringForPossibleEmptyReplacement(
+      int message_id_with_placeholders, int message_id_without_placeholders,
+      const std::wstring& replacement_string);
+
+  // Setter/getter combination to set and retreieve the current
+  // state of the plugin installer.
+  void set_plugin_installer_state(PluginInstallerState new_state) {
+    plugin_installer_state_ = new_state;
+  }
+
+  PluginInstallerState plugin_installer_state() const {
+    return plugin_installer_state_;
+  }
+
+  // Getter for the NPP instance member.
+  const NPP instance() const {
+    return instance_;
+  }
+
+  // Returns whether or not the UI layout is right-to-left (such as Hebrew or
+  // Arabic).
+  bool IsRTLLayout() const;
+
+ protected:
+  // Displays the plugin install confirmation dialog.
+  void ShowInstallDialog();
+
+  // Clears the current display state.
+  void ClearDisplay();
+
+  // Displays the status message identified by the message resource id
+  // passed in.
+  //
+  // Parameters:
+  // message_resource_id parameter
+  //   The resource id of the message to be displayed.
+  void DisplayStatus(int message_resource_id);
+
+  // Displays status information for the third party plugin which is needed
+  // by the page.
+  void DisplayAvailablePluginStatus();
+
+  // Displays information related to third party plugin download failure.
+  void DisplayPluginDownloadFailedStatus();
+
+  // Enables the plugin window if required and initiates an update of the
+  // the plugin window.
+  void RefreshDisplay();
+
+  // Create tooltip window.
+  bool CreateToolTip();
+
+  // Update ToolTip text with the message shown inside the default plugin.
+  void UpdateToolTip();
+
+  // Resolves the relative URL (could be already an absolute URL too) to return
+  // full URL based on current document's URL and base.
+  //
+  // Parameters:
+  // instance
+  //   The plugins opaque instance handle.
+  // relative_url
+  //   The URL to be resolved.
+  // Returns the resolved URL.
+  std::string ResolveURL(NPP instance, const std::string& relative_url);
+
+  // Initializes resources like the icon, fonts, etc needed by the plugin
+  // installer
+  //
+  // Parameters:
+  // module_handle
+  //   Handle to the dll in which this object is instantiated.
+  // Returns true on success.
+  bool InitializeResources(void *module_handle);
+
+  // Parses the plugin instantiation arguments. This includes checking for
+  // whether this is an activex install and reading the appropriate
+  // arguments like codebase, etc. For plugin installs we download the
+  // plugin finder URL and initalize the mime type and the plugin instance
+  // info.
+  //
+  // Parameters:
+  // module_handle
+  //   The handle to the dll in which this object is instantiated.
+  // instance
+  //   The plugins opaque instance handle.
+  // mime_type
+  //   Identifies the third party plugin which would be eventually installed.
+  // argc
+  //   Indicates the count of arguments passed in from the webpage.
+  // argv
+  //   Pointer to the arguments.
+  // raw_activex_clsid
+  //   Output parameter which contains the CLSID of the Activex plugin needed.
+  //   This is only applicable if the webpage specifically requests an ActiveX
+  //   control.
+  // Returns true on success.
+  bool ParseInstantiationArguments(NPMIMEType mime_type, NPP instance,
+                                   int16 argc, char* argn[], char* argv[],
+                                   std::string* raw_activex_clsid);
+
+  // Paints user action messages to the plugin window. These include messages
+  // like whether the user should click on the plugin window to download the
+  // plugin, etc.
+  //
+  // Parameters:
+  // paint_dc
+  //   The device context returned in BeginPaint.
+  // x_origin
+  //   Horizontal reference point indicating where the text is to be displayed.
+  // y_origin
+  //   Vertical reference point indicating where the text is to be displayed.
+  //
+  void PaintUserActionInformation(gfx::NativeDrawingContext paint_dc,
+                                  int x_origin, int y_origin);
+
+ private:
+  // Notify the renderer that plugin is available to download.
+  void NotifyPluginStatus(int status);
+
+  // The plugins opaque instance handle
+  NPP instance_;
+  // The current stream.
+  NPStream* plugin_install_stream_;
+  // The desired mime type.
+  std::string mime_type_;
+  // The current state of the plugin installer.
+  PluginInstallerState plugin_installer_state_;
+  // GtkPlug containing everything in the plugin.
+  GtkWidget* container_;
+
+  DISALLOW_COPY_AND_ASSIGN(PluginInstallerImpl);
+};
+
+#endif  // WEBKIT_DEFAULT_PLUGIN_PLUGIN_IMPL_GTK_H_