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cef/cef1/tests/cefclient/osrplugin.cpp

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// Copyright (c) 2011 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 "cefclient/osrplugin.h"
#include "cefclient/osrenderer.h"
#if defined(OS_WIN)
#include <windows.h>
#define _USE_MATH_DEFINES
#include <math.h>
#include <gl/gl.h>
#include <gl/glu.h>
#include <sstream>
#include <string>
#include "include/cef_browser.h"
#include "include/cef_frame.h"
#include "cefclient/cefclient.h"
#include "cefclient/client_popup_handler.h"
#include "cefclient/resource.h"
#include "cefclient/resource_util.h"
#include "cefclient/string_util.h"
#include "cefclient/util.h"
// Initialized in NP_Initialize.
NPNetscapeFuncs* g_osrbrowser = NULL;
namespace {
CefRefPtr<CefBrowser> g_offscreenBrowser;
// If set to true alpha transparency will be used.
bool g_offscreenTransparent = false;
// Class holding pointers for the client plugin window.
class ClientPlugin {
public:
ClientPlugin(bool transparent)
: renderer(transparent),
hWnd(NULL),
hDC(NULL),
hRC(NULL) {
}
ClientOSRenderer renderer;
HWND hWnd;
HDC hDC;
HGLRC hRC;
};
// Handler for off-screen rendering windows.
class ClientOSRHandler : public CefClient,
public CefLifeSpanHandler,
public CefLoadHandler,
public CefRequestHandler,
public CefDisplayHandler,
public CefRenderHandler {
public:
explicit ClientOSRHandler(ClientPlugin* plugin)
: plugin_(plugin),
want_pixel_value_(false) {
}
~ClientOSRHandler() {
}
// Called immediately before the plugin is destroyed.
void Detach() {
plugin_ = NULL;
}
// Retrieve the pixel value at the requested coordinate the next time that
// the view is painted.
void WantPixelValue(int x, int y) {
if (!want_pixel_value_) {
want_pixel_value_ = true;
// Trigger a call to OnPaint.
if (g_offscreenBrowser.get())
g_offscreenBrowser->Invalidate(CefRect(0,0,1,1));
}
coord_x_ = x;
coord_y_ = y;
}
// CefClient methods
virtual CefRefPtr<CefLifeSpanHandler> GetLifeSpanHandler() OVERRIDE {
return this;
}
virtual CefRefPtr<CefLoadHandler> GetLoadHandler() OVERRIDE {
return this;
}
virtual CefRefPtr<CefRequestHandler> GetRequestHandler() OVERRIDE {
return this;
}
virtual CefRefPtr<CefDisplayHandler> GetDisplayHandler() OVERRIDE {
return this;
}
virtual CefRefPtr<CefRenderHandler> GetRenderHandler() OVERRIDE {
return this;
}
// CefLifeSpanHandler methods
virtual bool OnBeforePopup(CefRefPtr<CefBrowser> parentBrowser,
const CefPopupFeatures& popupFeatures,
CefWindowInfo& windowInfo,
const CefString& url,
CefRefPtr<CefClient>& client,
CefBrowserSettings& settings) OVERRIDE {
REQUIRE_UI_THREAD();
windowInfo.m_bWindowRenderingDisabled = TRUE;
client = new ClientPopupHandler(g_offscreenBrowser);
return false;
}
virtual void OnAfterCreated(CefRefPtr<CefBrowser> browser) OVERRIDE {
REQUIRE_UI_THREAD();
g_offscreenBrowser = browser;
// Set the off-screen browser size to match the plugin window size.
RECT clientRect;
::GetClientRect(plugin_->hWnd, &clientRect);
g_offscreenBrowser->SetSize(PET_VIEW, clientRect.right, clientRect.bottom);
}
virtual void OnBeforeClose(CefRefPtr<CefBrowser> browser) OVERRIDE {
g_offscreenBrowser = NULL;
}
// CefLoadHandler methods
virtual void OnLoadStart(CefRefPtr<CefBrowser> browser,
CefRefPtr<CefFrame> frame) OVERRIDE {
REQUIRE_UI_THREAD();
if (!browser->IsPopup() && frame->IsMain()) {
// We've just started loading a page
SetLoading(true);
}
}
virtual void OnLoadEnd(CefRefPtr<CefBrowser> browser,
CefRefPtr<CefFrame> frame,
int httpStatusCode) OVERRIDE {
REQUIRE_UI_THREAD();
if (!browser->IsPopup() && frame->IsMain()) {
// We've just finished loading a page
SetLoading(false);
}
}
// CefRequestHandler methods
virtual bool OnBeforeResourceLoad(CefRefPtr<CefBrowser> browser,
CefRefPtr<CefRequest> request,
CefString& redirectUrl,
CefRefPtr<CefStreamReader>& resourceStream,
CefRefPtr<CefResponse> response,
int loadFlags) OVERRIDE {
REQUIRE_IO_THREAD();
std::string url = request->GetURL();
if (url == "http://tests/transparency") {
resourceStream = GetBinaryResourceReader(IDS_TRANSPARENCY);
response->SetMimeType("text/html");
response->SetStatus(200);
}
return false;
}
// CefDisplayHandler methods
virtual void OnNavStateChange(CefRefPtr<CefBrowser> browser,
bool canGoBack,
bool canGoForward) OVERRIDE {
REQUIRE_UI_THREAD();
// Set the "back" and "forward" button state in the HTML.
std::stringstream ss;
ss << "document.getElementById('back').disabled = "
<< (canGoBack?"false":"true") << ";";
ss << "document.getElementById('forward').disabled = "
<< (canGoForward?"false":"true") << ";";
AppGetBrowser()->GetMainFrame()->ExecuteJavaScript(ss.str(), "", 0);
}
virtual void OnAddressChange(CefRefPtr<CefBrowser> browser,
CefRefPtr<CefFrame> frame,
const CefString& url) OVERRIDE {
REQUIRE_UI_THREAD();
// Set the "url" value in the HTML.
std::stringstream ss;
std::string urlStr = url;
StringReplace(urlStr, "'", "\\'");
ss << "document.getElementById('url').value = '" << urlStr.c_str() << "'";
AppGetBrowser()->GetMainFrame()->ExecuteJavaScript(ss.str(), "", 0);
}
virtual void OnTitleChange(CefRefPtr<CefBrowser> browser,
const CefString& title) OVERRIDE {
REQUIRE_UI_THREAD();
// Set the "title" value in the HTML.
std::stringstream ss;
std::string titleStr = title;
StringReplace(titleStr, "'", "\\'");
ss << "document.getElementById('title').innerHTML = '" <<
titleStr.c_str() << "'";
AppGetBrowser()->GetMainFrame()->ExecuteJavaScript(ss.str(), "", 0);
}
// CefRenderHandler methods
virtual bool GetViewRect(CefRefPtr<CefBrowser> browser,
CefRect& rect) OVERRIDE {
REQUIRE_UI_THREAD();
if (!plugin_)
return false;
// The simulated screen and view rectangle are the same. This is necessary
// for popup menus to be located and sized inside the view.
RECT clientRect;
::GetClientRect(plugin_->hWnd, &clientRect);
rect.x = rect.y = 0;
rect.width = clientRect.right;
rect.height = clientRect.bottom;
return true;
}
virtual bool GetScreenRect(CefRefPtr<CefBrowser> browser,
CefRect& rect) OVERRIDE {
return GetViewRect(browser, rect);
}
virtual bool GetScreenPoint(CefRefPtr<CefBrowser> browser,
int viewX,
int viewY,
int& screenX,
int& screenY) OVERRIDE {
REQUIRE_UI_THREAD();
if (!plugin_)
return false;
// Convert the point from view coordinates to actual screen coordinates.
POINT screen_pt = {viewX, viewY};
MapWindowPoints(plugin_->hWnd, HWND_DESKTOP, &screen_pt, 1);
screenX = screen_pt.x;
screenY = screen_pt.y;
return true;
}
virtual void OnPopupShow(CefRefPtr<CefBrowser> browser,
bool show) OVERRIDE {
REQUIRE_UI_THREAD();
if (!plugin_)
return;
plugin_->renderer.OnPopupShow(browser, show);
}
virtual void OnPopupSize(CefRefPtr<CefBrowser> browser,
const CefRect& rect) OVERRIDE {
REQUIRE_UI_THREAD();
if (!plugin_)
return;
plugin_->renderer.OnPopupSize(browser, rect);
}
virtual void OnPaint(CefRefPtr<CefBrowser> browser,
PaintElementType type,
const RectList& dirtyRects,
const void* buffer) OVERRIDE {
REQUIRE_UI_THREAD();
if (!plugin_)
return;
wglMakeCurrent(plugin_->hDC, plugin_->hRC);
plugin_->renderer.OnPaint(browser, type, dirtyRects, buffer);
plugin_->renderer.Render();
SwapBuffers(plugin_->hDC);
if (type == PET_VIEW && want_pixel_value_) {
// Retrieve the pixel value at the requested coordinate.
int width = plugin_->renderer.GetViewWidth();
int height = plugin_->renderer.GetViewHeight();
if(coord_x_ >= 0 && coord_x_ < width &&
coord_y_ >= 0 && coord_y_ < height) {
bool transparent = plugin_->renderer.IsTransparent();
int index = (width * coord_y_ * 4) + (coord_x_ * 4);
const unsigned char *pBuf = static_cast<const unsigned char*>(buffer);
unsigned char r, g, b, a;
b = pBuf[index];
g = pBuf[index+1];
r = pBuf[index+2];
if (transparent)
a = pBuf[index+3];
std::stringstream ss;
ss << coord_x_ << "," << coord_y_ << " = R:" << static_cast<int>(r)
<< " G:" << static_cast<int>(g) << " B:" << static_cast<int>(b);
if (transparent)
ss << " A:" << static_cast<int>(a);
std::string js =
"document.getElementById('pixel').innerText = '" + ss.str() + "';";
AppGetBrowser()->GetMainFrame()->ExecuteJavaScript(js, "", 0);
}
want_pixel_value_ = false;
}
}
virtual void OnCursorChange(CefRefPtr<CefBrowser> browser,
CefCursorHandle cursor) OVERRIDE {
REQUIRE_UI_THREAD();
if (!plugin_)
return;
// Change the plugin window's cursor.
SetClassLong(plugin_->hWnd, GCL_HCURSOR,
static_cast<LONG>(reinterpret_cast<LONG_PTR>(cursor)));
SetCursor(cursor);
}
private:
void SetLoading(bool isLoading) {
// Set the "stop" and "reload" button state in the HTML.
std::stringstream ss;
ss << "document.getElementById('stop').disabled = "
<< (isLoading?"false":"true") << ";"
<< "document.getElementById('reload').disabled = "
<< (isLoading?"true":"false") << ";";
AppGetBrowser()->GetMainFrame()->ExecuteJavaScript(ss.str(), "", 0);
}
ClientPlugin* plugin_;
// Used for retrieving the pixel value.
bool want_pixel_value_;
int coord_x_;
int coord_y_;
// Include the default reference counting implementation.
IMPLEMENT_REFCOUNTING(ClientOSRPlugin);
};
// Forward declarations of functions included in this code module:
LRESULT CALLBACK PluginWndProc(HWND hWnd, UINT message, WPARAM wParam,
LPARAM lParam);
// Enable GL.
void EnableGL(ClientPlugin* plugin) {
PIXELFORMATDESCRIPTOR pfd;
int format;
// Get the device context.
plugin->hDC = GetDC(plugin->hWnd);
// Set the pixel format for the DC.
ZeroMemory(&pfd, sizeof(pfd));
pfd.nSize = sizeof(pfd);
pfd.nVersion = 1;
pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
pfd.iPixelType = PFD_TYPE_RGBA;
pfd.cColorBits = 24;
pfd.cDepthBits = 16;
pfd.iLayerType = PFD_MAIN_PLANE;
format = ChoosePixelFormat(plugin->hDC, &pfd);
SetPixelFormat(plugin->hDC, format, &pfd);
// Create and enable the render context.
plugin->hRC = wglCreateContext(plugin->hDC);
wglMakeCurrent(plugin->hDC, plugin->hRC);
plugin->renderer.Initialize();
}
// Disable GL.
void DisableGL(ClientPlugin* plugin) {
plugin->renderer.Cleanup();
wglMakeCurrent(NULL, NULL);
wglDeleteContext(plugin->hRC);
ReleaseDC(plugin->hWnd, plugin->hDC);
}
// Size the GL view.
void SizeGL(ClientPlugin* plugin, int width, int height) {
if (g_offscreenBrowser.get())
g_offscreenBrowser->SetSize(PET_VIEW, width, height);
}
NPError NPP_NewImpl(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 = new ClientPlugin(g_offscreenTransparent);
instance->pdata = reinterpret_cast<void*>(plugin);
return NPERR_NO_ERROR;
}
NPError NPP_DestroyImpl(NPP instance, NPSavedData** save) {
ClientPlugin* plugin = reinterpret_cast<ClientPlugin*>(instance->pdata);
if (plugin) {
if (g_offscreenBrowser.get()) {
CefRefPtr<ClientOSRHandler> handler =
static_cast<ClientOSRHandler*>(g_offscreenBrowser->GetClient().get());
handler->Detach();
}
if (plugin->hWnd) {
DestroyWindow(plugin->hWnd);
DisableGL(plugin);
}
delete plugin;
}
return NPERR_NO_ERROR;
}
NPError NPP_SetWindowImpl(NPP instance, NPWindow* window_info) {
if (instance == NULL)
return NPERR_INVALID_INSTANCE_ERROR;
if (window_info == NULL)
return NPERR_GENERIC_ERROR;
ClientPlugin* plugin = reinterpret_cast<ClientPlugin*>(instance->pdata);
HWND parent_hwnd = reinterpret_cast<HWND>(window_info->window);
if (plugin->hWnd == NULL) {
WNDCLASS wc;
HINSTANCE hInstance = GetModuleHandle(NULL);
// Register the window class.
wc.style = CS_OWNDC;
wc.lpfnWndProc = PluginWndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hInstance;
wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
wc.lpszMenuName = NULL;
wc.lpszClassName = L"ClientOSRPlugin";
RegisterClass(&wc);
// Create the main window.
plugin->hWnd = CreateWindow(L"ClientOSRPlugin", L"Client OSR Plugin",
WS_CHILD|WS_CLIPCHILDREN|WS_CLIPSIBLINGS, 0, 0, 0, 0, parent_hwnd, NULL,
hInstance, NULL);
SetWindowLongPtr(plugin->hWnd, GWLP_USERDATA,
reinterpret_cast<LONG_PTR>(plugin));
// Enable GL drawing for the window.
EnableGL(plugin);
// Create the off-screen rendering window.
CefWindowInfo windowInfo;
windowInfo.SetAsOffScreen(plugin->hWnd);
if (g_offscreenTransparent)
windowInfo.SetTransparentPainting(TRUE);
CefBrowserSettings settings;
AppGetBrowserSettings(settings);
CefBrowser::CreateBrowser(windowInfo, new ClientOSRHandler(plugin),
"http://www.google.com", settings);
}
// Position the plugin window and make sure it's visible.
RECT parent_rect;
GetClientRect(parent_hwnd, &parent_rect);
SetWindowPos(plugin->hWnd, NULL, parent_rect.left, parent_rect.top,
parent_rect.right - parent_rect.left,
parent_rect.bottom - parent_rect.top, SWP_SHOWWINDOW);
UpdateWindow(plugin->hWnd);
ShowWindow(plugin->hWnd, SW_SHOW);
return NPERR_NO_ERROR;
}
// Plugin window procedure.
LRESULT CALLBACK PluginWndProc(HWND hWnd, UINT message, WPARAM wParam,
LPARAM lParam) {
static POINT lastMousePos, curMousePos;
static bool mouseRotation = false;
static bool mouseTracking = false;
ClientPlugin* plugin =
reinterpret_cast<ClientPlugin*>(GetWindowLongPtr(hWnd, GWLP_USERDATA));
switch (message) {
case WM_DESTROY:
// Explicitly close the offscreen browser and release the reference.
g_offscreenBrowser->CloseBrowser();
g_offscreenBrowser = NULL;
return 0;
case WM_LBUTTONDOWN:
case WM_RBUTTONDOWN:
SetCapture(hWnd);
SetFocus(hWnd);
if (wParam & MK_SHIFT) {
// Start rotation effect.
lastMousePos.x = curMousePos.x = LOWORD(lParam);
lastMousePos.y = curMousePos.y = HIWORD(lParam);
mouseRotation = true;
} else if (wParam & MK_CONTROL) {
// Retrieve the pixel value.
int x = LOWORD(lParam);
int y = HIWORD(lParam);
CefRefPtr<ClientOSRHandler> handler =
static_cast<ClientOSRHandler*>(g_offscreenBrowser->GetClient().get());
handler->WantPixelValue(x, y);
} else {
if (g_offscreenBrowser.get()) {
g_offscreenBrowser->SendMouseClickEvent(LOWORD(lParam), HIWORD(lParam),
(message == WM_LBUTTONDOWN?MBT_LEFT:MBT_RIGHT), false, 1);
}
}
break;
case WM_LBUTTONUP:
case WM_RBUTTONUP:
if (GetCapture() == hWnd)
ReleaseCapture();
if (mouseRotation) {
// End rotation effect.
mouseRotation = false;
plugin->renderer.SetSpin(0, 0);
} else {
if (g_offscreenBrowser.get()) {
g_offscreenBrowser->SendMouseClickEvent(LOWORD(lParam), HIWORD(lParam),
(message == WM_LBUTTONUP?MBT_LEFT:MBT_RIGHT), true, 1);
}
}
break;
case WM_MOUSEMOVE:
if (mouseRotation) {
// Apply rotation effect.
curMousePos.x = LOWORD(lParam);
curMousePos.y = HIWORD(lParam);
plugin->renderer.IncrementSpin((curMousePos.x - lastMousePos.x),
(curMousePos.y - lastMousePos.y));
lastMousePos.x = curMousePos.x;
lastMousePos.y = curMousePos.y;
} else {
if (!mouseTracking) {
// Start tracking mouse leave. Required for the WM_MOUSELEAVE event to
// be generated.
TRACKMOUSEEVENT tme;
tme.cbSize = sizeof(TRACKMOUSEEVENT);
tme.dwFlags = TME_LEAVE;
tme.hwndTrack = hWnd;
TrackMouseEvent(&tme);
mouseTracking = true;
}
if (g_offscreenBrowser.get()) {
g_offscreenBrowser->SendMouseMoveEvent(LOWORD(lParam), HIWORD(lParam),
false);
}
}
break;
case WM_MOUSELEAVE:
if (mouseTracking) {
// Stop tracking mouse leave.
TRACKMOUSEEVENT tme;
tme.cbSize = sizeof(TRACKMOUSEEVENT);
tme.dwFlags = TME_LEAVE & TME_CANCEL;
tme.hwndTrack = hWnd;
TrackMouseEvent(&tme);
mouseTracking = false;
}
if (g_offscreenBrowser.get())
g_offscreenBrowser->SendMouseMoveEvent(0, 0, true);
break;
case WM_MOUSEWHEEL:
if (g_offscreenBrowser.get()) {
g_offscreenBrowser->SendMouseWheelEvent(LOWORD(lParam), HIWORD(lParam),
0, GET_WHEEL_DELTA_WPARAM(wParam));
}
break;
case WM_SIZE: {
int width = LOWORD(lParam);
int height = HIWORD(lParam);
if (width > 0 && height > 0)
SizeGL(plugin, width, height);
break;
}
case WM_SETFOCUS:
case WM_KILLFOCUS:
if (g_offscreenBrowser.get())
g_offscreenBrowser->SendFocusEvent(message == WM_SETFOCUS);
break;
case WM_CAPTURECHANGED:
case WM_CANCELMODE:
if (!mouseRotation) {
if (g_offscreenBrowser.get())
g_offscreenBrowser->SendCaptureLostEvent();
}
break;
case WM_KEYDOWN:
case WM_KEYUP:
case WM_SYSKEYDOWN:
case WM_SYSKEYUP:
case WM_CHAR:
case WM_SYSCHAR:
case WM_IME_CHAR:
if (g_offscreenBrowser.get()) {
CefBrowser::KeyType type = KT_CHAR;
CefKeyInfo keyInfo;
keyInfo.key = wParam;
if (message == WM_KEYDOWN || message == WM_SYSKEYDOWN)
type = KT_KEYDOWN;
else if (message == WM_KEYUP || message == WM_SYSKEYUP)
type = KT_KEYUP;
if (message == WM_SYSKEYDOWN || message == WM_SYSKEYUP ||
message == WM_SYSCHAR)
keyInfo.sysChar = true;
if (message == WM_IME_CHAR)
keyInfo.imeChar = true;
g_offscreenBrowser->SendKeyEvent(type, keyInfo, lParam);
}
break;
case WM_PAINT: {
PAINTSTRUCT ps;
BeginPaint(hWnd, &ps);
EndPaint(hWnd, &ps);
return 0;
}
case WM_ERASEBKGND:
return 0;
}
return DefWindowProc(hWnd, message, wParam, lParam);
}
} // namespace
NPError API_CALL NP_OSRGetEntryPoints(NPPluginFuncs* pFuncs) {
pFuncs->newp = NPP_NewImpl;
pFuncs->destroy = NPP_DestroyImpl;
pFuncs->setwindow = NPP_SetWindowImpl;
return NPERR_NO_ERROR;
}
NPError API_CALL NP_OSRInitialize(NPNetscapeFuncs* pFuncs) {
g_osrbrowser = pFuncs;
return NPERR_NO_ERROR;
}
NPError API_CALL NP_OSRShutdown(void) {
g_osrbrowser = NULL;
return NPERR_NO_ERROR;
}
CefRefPtr<CefBrowser> GetOffScreenBrowser() {
return g_offscreenBrowser;
}
void SetOffScreenTransparent(bool transparent) {
g_offscreenTransparent = transparent;
}
#endif // OS_WIN
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