cef/tests/cefclient/clientplugin.cpp

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// Copyright (c) 2008 The Chromium Embedded Framework Authors.
// Portions copyright (c) 2006-2008 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.
#include "clientplugin.h"
#ifdef _WIN32
// Initialized in NP_Initialize.
NPNetscapeFuncs* g_browser = NULL;
static
NPError NPP_New(NPMIMEType plugin_type, NPP instance, uint16 mode, int16 argc,
char* argn[], char* argv[], NPSavedData* saved) {
if (instance == NULL)
return NPERR_INVALID_INSTANCE_ERROR;
ClientPlugin* plugin_impl = new ClientPlugin(mode);
plugin_impl->Initialize(GetModuleHandle(NULL), instance, plugin_type, argc,
argn, argv);
instance->pdata = reinterpret_cast<void*>(plugin_impl);
return NPERR_NO_ERROR;
}
static
NPError NPP_Destroy(NPP instance, NPSavedData** save) {
ClientPlugin* plugin_impl = reinterpret_cast<ClientPlugin*>(instance->pdata);
if (plugin_impl) {
plugin_impl->Shutdown();
delete plugin_impl;
}
return NPERR_NO_ERROR;
}
static
NPError NPP_SetWindow(NPP instance, NPWindow* window_info) {
if (instance == NULL)
return NPERR_INVALID_INSTANCE_ERROR;
if (window_info == NULL)
return NPERR_GENERIC_ERROR;
ClientPlugin* plugin_impl = reinterpret_cast<ClientPlugin*>(instance->pdata);
if (plugin_impl == NULL)
return NPERR_GENERIC_ERROR;
HWND window_handle = reinterpret_cast<HWND>(window_info->window);
if (!plugin_impl->SetWindow(window_handle)) {
delete plugin_impl;
return NPERR_GENERIC_ERROR;
}
return NPERR_NO_ERROR;
}
NPError API_CALL NP_GetEntryPoints(NPPluginFuncs* pFuncs)
{
pFuncs->newp = NPP_New;
pFuncs->destroy = NPP_Destroy;
pFuncs->setwindow = NPP_SetWindow;
return NPERR_NO_ERROR;
}
NPError API_CALL NP_Initialize(NPNetscapeFuncs* pFuncs)
{
g_browser = pFuncs;
return NPERR_NO_ERROR;
}
NPError API_CALL NP_Shutdown(void)
{
g_browser = NULL;
return NPERR_NO_ERROR;
}
// ClientPlugin Implementation
ClientPlugin::ClientPlugin(int16 mode)
: mode_(mode)
{
}
ClientPlugin::~ClientPlugin()
{
}
bool ClientPlugin::Initialize(HINSTANCE module_handle, NPP instance,
NPMIMEType mime_type, int16 argc, char* argn[],
char* argv[])
{
RefreshDisplay();
return true;
}
bool ClientPlugin::SetWindow(HWND parent_window)
{
if (!::IsWindow(parent_window)) {
// No window created yet. Ignore this call.
if (!IsWindow())
return true;
// Parent window has been destroyed.
Shutdown();
return true;
}
RECT parent_rect;
if (IsWindow()) {
::GetClientRect(parent_window, &parent_rect);
SetWindowPos(NULL, &parent_rect, SWP_SHOWWINDOW);
return true;
}
// First time in -- no window created by plugin yet.
::GetClientRect(parent_window, &parent_rect);
Create(parent_window, parent_rect, NULL, WS_CHILD | WS_BORDER);
UpdateWindow();
ShowWindow(SW_SHOW);
return true;
}
void ClientPlugin::Shutdown()
{
if (IsWindow()) {
DestroyWindow();
}
}
LRESULT ClientPlugin::OnPaint(UINT message, WPARAM wparam, LPARAM lparam,
BOOL& handled)
{
PAINTSTRUCT paint_struct;
BeginPaint(&paint_struct);
Paint(paint_struct.hdc);
EndPaint(&paint_struct);
return 0;
}
// PrintClient is necessary to support off-screen rendering.
LRESULT ClientPlugin::OnPrintClient(UINT message, WPARAM wparam, LPARAM lparam,
BOOL& handled)
{
Paint(reinterpret_cast<HDC>(wparam));
return 0;
}
LRESULT ClientPlugin::OnEraseBackGround(UINT message, WPARAM wparam,
LPARAM lparam, BOOL& handled)
{
HDC paint_device_context = reinterpret_cast<HDC>(wparam);
RECT erase_rect;
GetClipBox(paint_device_context, &erase_rect);
HBRUSH brush = CreateSolidBrush(RGB(0, 255, 0));
FillRect(paint_device_context, &erase_rect, brush);
DeleteObject(brush);
return 1;
}
LRESULT ClientPlugin::OnLButtonDown(UINT message, WPARAM wparam, LPARAM lparam,
BOOL& handled)
{
MessageBox(L"You clicked on the client plugin!", L"Client Plugin", MB_OK);
return 0;
}
void ClientPlugin::RefreshDisplay() {
if (!IsWindow())
return;
InvalidateRect(NULL, TRUE);
UpdateWindow();
}
void ClientPlugin::Paint(HDC hdc) {
static LPCWSTR text = L"Left click in the green area for a message box!";
RECT client_rect;
GetClientRect(&client_rect);
int old_mode = SetBkMode(hdc, TRANSPARENT);
COLORREF old_color = SetTextColor(hdc, RGB(0, 0, 255));
RECT text_rect = client_rect;
DrawText(hdc, text, -1, &text_rect, DT_CENTER | DT_CALCRECT);
client_rect.top = ((client_rect.bottom - client_rect.top)
- (text_rect.bottom - text_rect.top)) / 2;
DrawText(hdc, text, -1, &client_rect, DT_CENTER);
SetBkMode(hdc, old_mode);
SetTextColor(hdc, old_color);
}
#endif // _WIN32