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cef/tests/cefclient/cefclient.cpp

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// Copyright (c) 2008-2009 The Chromium Embedded Framework 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 "stdafx.h"
#include "cefclient.h"
#include "clientplugin.h"
#include "cef.h"
#include <sstream>
#define MAX_LOADSTRING 100
#define MAX_URL_LENGTH 255
#define BUTTON_WIDTH 72
#define URLBAR_HEIGHT 24
// Define this value to run CEF with messages processed using the current
// application's message loop.
#define TEST_SINGLE_THREADED_MESSAGE_LOOP
// Global Variables:
HINSTANCE hInst; // current instance
TCHAR szTitle[MAX_LOADSTRING]; // The title bar text
TCHAR szWindowClass[MAX_LOADSTRING]; // the main window class name
// Forward declarations of functions included in this code module:
ATOM MyRegisterClass(HINSTANCE hInstance);
BOOL InitInstance(HINSTANCE, int);
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
INT_PTR CALLBACK About(HWND, UINT, WPARAM, LPARAM);
// Implementation of the V8 handler class for the "cef.test" extension.
class ClientV8ExtensionHandler : public CefThreadSafeBase<CefV8Handler>
{
public:
ClientV8ExtensionHandler() : test_param_(L"An initial string value.") {}
virtual ~ClientV8ExtensionHandler() {}
// Execute with the specified argument list and return value. Return true if
// the method was handled.
virtual bool Execute(const std::wstring& name,
CefRefPtr<CefV8Value> object,
CefV8ValueList& arguments,
CefRefPtr<CefV8Value>& retval,
std::wstring& exception)
{
if(name == L"SetTestParam")
{
// Handle the SetTestParam native function by saving the string argument
// into the local member.
if(arguments.size() != 1 || !arguments[0]->IsString())
return false;
test_param_ = arguments[0]->GetStringValue();
return true;
}
else if(name == L"GetTestParam")
{
// Handle the GetTestParam native function by returning the local member
// value.
retval = CefV8Value::CreateString(test_param_);
return true;
}
else if(name == L"GetTestObject")
{
// Handle the GetTestObject native function by creating and returning a
// new V8 object.
retval = CefV8Value::CreateObject(NULL);
// Add a string parameter to the new V8 object.
retval->SetValue(L"param", CefV8Value::CreateString(
L"Retrieving a parameter on a native object succeeded."));
// Add a function to the new V8 object.
retval->SetValue(L"GetMessage",
CefV8Value::CreateFunction(L"GetMessage", this));
return true;
}
else if(name == L"GetMessage")
{
// Handle the GetMessage object function by returning a string.
retval = CefV8Value::CreateString(
L"Calling a function on a native object succeeded.");
return true;
}
return false;
}
private:
std::wstring test_param_;
};
int APIENTRY _tWinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPTSTR lpCmdLine,
int nCmdShow)
{
UNREFERENCED_PARAMETER(hPrevInstance);
UNREFERENCED_PARAMETER(lpCmdLine);
#ifdef TEST_SINGLE_THREADED_MESSAGE_LOOP
// Initialize the CEF with messages processed using the current application's
// message loop.
CefInitialize(false, std::wstring());
#else
// Initialize the CEF with messages processed using a separate UI thread.
CefInitialize(true, std::wstring());
#endif
// Structure providing information about the client plugin.
CefPluginInfo plugin_info;
plugin_info.display_name = L"Client Plugin";
plugin_info.unique_name = L"client_plugin";
plugin_info.version = L"1, 0, 0, 1";
plugin_info.description = L"My Example Client Plugin";
CefPluginMimeType mime_type;
mime_type.mime_type = L"application/x-client-plugin";
mime_type.file_extensions.push_back(L"*");
plugin_info.mime_types.push_back(mime_type);
plugin_info.np_getentrypoints = NP_GetEntryPoints;
plugin_info.np_initialize = NP_Initialize;
plugin_info.np_shutdown = NP_Shutdown;
// Register the internal client plugin
CefRegisterPlugin(plugin_info);
// Register a V8 extension with the below JavaScript code that calls native
// methods implemented in ClientV8ExtensionHandler.
std::wstring code = L"var cef;"
L"if (!cef)"
L" cef = {};"
L"if (!cef.test)"
L" cef.test = {};"
L"(function() {"
L" cef.test.__defineGetter__('test_param', function() {"
L" native function GetTestParam();"
L" return GetTestParam();"
L" });"
L" cef.test.__defineSetter__('test_param', function(b) {"
L" native function SetTestParam();"
L" if(b) SetTestParam(b);"
L" });"
L" cef.test.test_object = function() {"
L" native function GetTestObject();"
L" return GetTestObject();"
L" };"
L"})();";
CefRegisterExtension(L"v8/test", code, new ClientV8ExtensionHandler());
MSG msg;
HACCEL hAccelTable;
// Initialize global strings
LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
LoadString(hInstance, IDC_CEFCLIENT, szWindowClass, MAX_LOADSTRING);
MyRegisterClass(hInstance);
// Perform application initialization
if (!InitInstance (hInstance, nCmdShow))
{
return FALSE;
}
hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_CEFCLIENT));
// Main message loop
while (GetMessage(&msg, NULL, 0, 0))
{
#ifdef TEST_SINGLE_THREADED_MESSAGE_LOOP
// Allow the CEF to do its message loop processing.
CefDoMessageLoopWork();
#endif
if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
// Shut down the CEF
CefShutdown();
return (int) msg.wParam;
}
//
// FUNCTION: MyRegisterClass()
//
// PURPOSE: Registers the window class.
//
// COMMENTS:
//
// This function and its usage are only necessary if you want this code
// to be compatible with Win32 systems prior to the 'RegisterClassEx'
// function that was added to Windows 95. It is important to call this
// function so that the application will get 'well formed' small icons
// associated with it.
//
ATOM MyRegisterClass(HINSTANCE hInstance)
{
WNDCLASSEX wcex;
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.style = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc = WndProc;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = hInstance;
wcex.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_CEFCLIENT));
wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wcex.lpszMenuName = MAKEINTRESOURCE(IDC_CEFCLIENT);
wcex.lpszClassName = szWindowClass;
wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));
return RegisterClassEx(&wcex);
}
//
// FUNCTION: InitInstance(HINSTANCE, int)
//
// PURPOSE: Saves instance handle and creates main window
//
// COMMENTS:
//
// In this function, we save the instance handle in a global variable and
// create and display the main program window.
//
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
HWND hWnd;
hInst = hInstance; // Store instance handle in our global variable
hWnd = CreateWindow(szWindowClass, szTitle,
WS_OVERLAPPEDWINDOW | WS_CLIPCHILDREN, CW_USEDEFAULT, 0, CW_USEDEFAULT,
0, NULL, NULL, hInstance, NULL);
if (!hWnd)
{
return FALSE;
}
ShowWindow(hWnd, nCmdShow);
UpdateWindow(hWnd);
return TRUE;
}
// Load a resource of type BINARY
bool LoadBinaryResource(int binaryId, DWORD &dwSize, LPBYTE &pBytes)
{
HRSRC hRes = FindResource(hInst, MAKEINTRESOURCE(binaryId),
MAKEINTRESOURCE(256));
if(hRes)
{
HGLOBAL hGlob = LoadResource(hInst, hRes);
if(hGlob)
{
dwSize = SizeofResource(hInst, hRes);
pBytes = (LPBYTE)LockResource(hGlob);
if(dwSize > 0 && pBytes)
return true;
}
}
return false;
}
// Implementation of the V8 handler class for the "window.cef_test.Dump"
// function.
class ClientV8FunctionHandler : public CefThreadSafeBase<CefV8Handler>
{
public:
ClientV8FunctionHandler() {}
virtual ~ClientV8FunctionHandler() {}
// Execute with the specified argument list and return value. Return true if
// the method was handled.
virtual bool Execute(const std::wstring& name,
CefRefPtr<CefV8Value> object,
CefV8ValueList& arguments,
CefRefPtr<CefV8Value>& retval,
std::wstring& exception)
{
if(name == L"Dump")
{
// The "Dump" function will return a human-readable dump of the input
// arguments.
std::wstringstream stream;
size_t i;
for(i = 0; i < arguments.size(); ++i)
{
stream << L"arg[" << i << L"] = ";
PrintValue(arguments[i], stream, 0);
stream << L"\n";
}
retval = CefV8Value::CreateString(stream.str());
return true;
}
else if(name == L"Call")
{
// The "Call" function will execute a function to get an object and then
// return the result of calling a function belonging to that object. The
// first arument is the function that will return an object and the second
// argument is the function that will be called on that returned object.
int argSize = arguments.size();
if(argSize < 2 || !arguments[0]->IsFunction()
|| !arguments[1]->IsString())
return false;
CefV8ValueList argList;
// Execute the function stored in the first argument to retrieve an
// object.
CefRefPtr<CefV8Value> objectPtr;
if(!arguments[0]->ExecuteFunction(object, argList, objectPtr, exception))
return false;
// Verify that the returned value is an object.
if(!objectPtr.get() || !objectPtr->IsObject())
return false;
// Retrieve the member function specified by name in the second argument
// from the object.
CefRefPtr<CefV8Value> funcPtr =
objectPtr->GetValue(arguments[1]->GetStringValue());
// Verify that the returned value is a function.
if(!funcPtr.get() || !funcPtr->IsFunction())
return false;
// Pass any additional arguments on to the member function.
for(int i = 2; i < argSize; ++i)
argList.push_back(arguments[i]);
// Execute the member function.
return funcPtr->ExecuteFunction(arguments[0], argList, retval, exception);
}
return false;
}
// Simple function for formatted output of a V8 value.
void PrintValue(CefRefPtr<CefV8Value> value, std::wstringstream &stream,
int indent)
{
std::wstringstream indent_stream;
for(int i = 0; i < indent; ++i)
indent_stream << L" ";
std::wstring indent_str = indent_stream.str();
if(value->IsUndefined())
stream << L"(undefined)";
else if(value->IsNull())
stream << L"(null)";
else if(value->IsBool())
stream << L"(bool) " << (value->GetBoolValue() ? L"true" : L"false");
else if(value->IsInt())
stream << L"(int) " << value->GetIntValue();
else if(value->IsDouble())
stream << L"(double) " << value->GetDoubleValue();
else if(value->IsString())
stream << L"(string) " << value->GetStringValue().c_str();
else if(value->IsFunction())
stream << L"(function) " << value->GetFunctionName().c_str();
else if(value->IsArray()) {
stream << L"(array) [";
int len = value->GetArrayLength();
for(int i = 0; i < len; ++i) {
stream << L"\n " << indent_str.c_str() << i << L" = ";
PrintValue(value->GetValue(i), stream, indent+1);
}
stream << L"\n" << indent_str.c_str() << L"]";
} else if(value->IsObject()) {
stream << L"(object) [";
std::vector<std::wstring> keys;
if(value->GetKeys(keys)) {
for(size_t i = 0; i < keys.size(); ++i) {
stream << L"\n " << indent_str.c_str() << keys[i].c_str() << L" = ";
PrintValue(value->GetValue(keys[i]), stream, indent+1);
}
}
stream << L"\n" << indent_str.c_str() << L"]";
}
}
};
// Client implementation of the browser handler class
class ClientHandler : public CefThreadSafeBase<CefHandler>
{
public:
ClientHandler()
{
m_MainHwnd = NULL;
m_BrowserHwnd = NULL;
m_EditHwnd = NULL;
m_bLoading = false;
m_bCanGoBack = false;
m_bCanGoForward = false;
}
~ClientHandler()
{
}
// Event called before a new window is created. The |parentBrowser| parameter
// will point to the parent browser window, if any. The |popup| parameter
// will be true if the new window is a popup window. If you create the window
// yourself you should populate the window handle member of |createInfo| and
// return RV_HANDLED. Otherwise, return RV_CONTINUE and the framework will
// create the window. By default, a newly created window will recieve the
// same handler as the parent window. To change the handler for the new
// window modify the object that |handler| points to.
virtual RetVal HandleBeforeCreated(CefRefPtr<CefBrowser> parentBrowser,
CefWindowInfo& createInfo, bool popup,
CefRefPtr<CefHandler>& handler,
std::wstring& url)
{
return RV_CONTINUE;
}
// Event called after a new window is created. The return value is currently
// ignored.
virtual RetVal HandleAfterCreated(CefRefPtr<CefBrowser> browser)
{
Lock();
if(!browser->IsPopup())
{
// We need to keep the main child window, but not popup windows
m_Browser = browser;
m_BrowserHwnd = browser->GetWindowHandle();
}
Unlock();
return RV_CONTINUE;
}
// Event called when the address bar changes. The return value is currently
// ignored.
virtual RetVal HandleAddressChange(CefRefPtr<CefBrowser> browser,
CefRefPtr<CefFrame> frame,
const std::wstring& url)
{
if(m_BrowserHwnd == browser->GetWindowHandle() && frame->IsMain())
{
// Set the edit window text
SetWindowText(m_EditHwnd, url.c_str());
}
return RV_CONTINUE;
}
// Event called when the page title changes. The return value is currently
// ignored.
virtual RetVal HandleTitleChange(CefRefPtr<CefBrowser> browser,
const std::wstring& title)
{
// Set the frame window title bar
HWND hwnd = browser->GetWindowHandle();
if(!browser->IsPopup())
{
// The frame window will be the parent of the browser window
hwnd = GetParent(hwnd);
}
SetWindowText(hwnd, title.c_str());
return RV_CONTINUE;
}
// Event called before browser navigation. The client has an opportunity to
// modify the |request| object if desired. Return RV_HANDLED to cancel
// navigation.
virtual RetVal HandleBeforeBrowse(CefRefPtr<CefBrowser> browser,
CefRefPtr<CefFrame> frame,
CefRefPtr<CefRequest> request,
NavType navType, bool isRedirect)
{
return RV_CONTINUE;
}
// Event called when the browser begins loading a page. The |frame| pointer
// will be empty if the event represents the overall load status and not the
// load status for a particular frame. The return value is currently ignored.
virtual RetVal HandleLoadStart(CefRefPtr<CefBrowser> browser,
CefRefPtr<CefFrame> frame)
{
if(!frame.get())
{
Lock();
// We've just started loading a page
m_bLoading = true;
m_bCanGoBack = false;
m_bCanGoForward = false;
Unlock();
}
return RV_CONTINUE;
}
// Event called when the browser is done loading a page. The |frame| pointer
// will be empty if the event represents the overall load status and not the
// load status for a particular frame. This event will be generated
// irrespective of whether the request completes successfully. The return
// value is currently ignored.
virtual RetVal HandleLoadEnd(CefRefPtr<CefBrowser> browser,
CefRefPtr<CefFrame> frame)
{
if(!frame.get())
{
Lock();
// We've just finished loading a page
m_bLoading = false;
m_bCanGoBack = browser->CanGoBack();
m_bCanGoForward = browser->CanGoForward();
Unlock();
}
return RV_CONTINUE;
}
// Called when the browser fails to load a resource. |errorCode| is the
// error code number and |failedUrl| is the URL that failed to load. To
// provide custom error text assign the text to |errorText| and return
// RV_HANDLED. Otherwise, return RV_CONTINUE for the default error text.
virtual RetVal HandleLoadError(CefRefPtr<CefBrowser> browser,
CefRefPtr<CefFrame> frame,
ErrorCode errorCode,
const std::wstring& failedUrl,
std::wstring& errorText)
{
if(errorCode == ERR_CACHE_MISS)
{
// Usually caused by navigating to a page with POST data via back or
// forward buttons.
errorText = L"<html><head><title>Expired Form Data</title></head>"
L"<body><h1>Expired Form Data</h1>"
L"<h2>Your form request has expired. "
L"Click reload to re-submit the form data.</h2></body>"
L"</html>";
}
else
{
// All other messages.
std::wstringstream ss;
ss << L"<html><head><title>Load Failed</title></head>"
L"<body><h1>Load Failed</h1>"
L"<h2>Load of URL " << failedUrl <<
L"failed with error code " << static_cast<int>(errorCode) <<
L".</h2></body>"
L"</html>";
errorText = ss.str();
}
return RV_HANDLED;
}
// Event called before a resource is loaded. To allow the resource to load
// normally return RV_CONTINUE. To redirect the resource to a new url
// populate the |redirectUrl| value and return RV_CONTINUE. To specify
// data for the resource return a CefStream object in |resourceStream|, set
// 'mimeType| to the resource stream's mime type, and return RV_CONTINUE.
// To cancel loading of the resource return RV_HANDLED.
virtual RetVal HandleBeforeResourceLoad(CefRefPtr<CefBrowser> browser,
CefRefPtr<CefRequest> request,
std::wstring& redirectUrl,
CefRefPtr<CefStreamReader>& resourceStream,
std::wstring& mimeType,
int loadFlags)
{
std::wstring url = request->GetURL();
if(wcsstr(url.c_str(), L"logo.gif") != NULL) {
// Any time we find "logo.gif" in the URL substitute in our own image
DWORD dwSize;
LPBYTE pBytes;
if(LoadBinaryResource(IDS_LOGO, dwSize, pBytes)) {
resourceStream = CefStreamReader::CreateForData(pBytes, dwSize);
mimeType = L"image/jpg";
}
}
return RV_CONTINUE;
}
// Event called before a context menu is displayed. To cancel display of the
// default context menu return RV_HANDLED.
virtual RetVal HandleBeforeMenu(CefRefPtr<CefBrowser> browser,
const MenuInfo& menuInfo)
{
return RV_CONTINUE;
}
// Event called to optionally override the default text for a context menu
// item. |label| contains the default text and may be modified to substitute
// alternate text. The return value is currently ignored.
virtual RetVal HandleGetMenuLabel(CefRefPtr<CefBrowser> browser,
MenuId menuId, std::wstring& label)
{
return RV_CONTINUE;
}
// Event called when an option is selected from the default context menu.
// Return RV_HANDLED to cancel default handling of the action.
virtual RetVal HandleMenuAction(CefRefPtr<CefBrowser> browser,
MenuId menuId)
{
return RV_CONTINUE;
}
// Event called to format print headers and footers. |printInfo| contains
// platform-specific information about the printer context. |url| is the
// URL if the currently printing page, |title| is the title of the currently
// printing page, |currentPage| is the current page number and |maxPages| is
// the total number of pages. Six default header locations are provided
// by the implementation: top left, top center, top right, bottom left,
// bottom center and bottom right. To use one of these default locations
// just assign a string to the appropriate variable. To draw the header
// and footer yourself return RV_HANDLED. Otherwise, populate the approprate
// variables and return RV_CONTINUE.
virtual RetVal HandlePrintHeaderFooter(CefRefPtr<CefBrowser> browser,
CefRefPtr<CefFrame> frame,
CefPrintInfo& printInfo,
const std::wstring& url,
const std::wstring& title,
int currentPage, int maxPages,
std::wstring& topLeft,
std::wstring& topCenter,
std::wstring& topRight,
std::wstring& bottomLeft,
std::wstring& bottomCenter,
std::wstring& bottomRight)
{
// Place the page title at top left
topLeft = title;
// Place the page URL at top right
topRight = url;
// Place "Page X of Y" at bottom center
std::wstringstream strstream;
strstream << L"Page " << currentPage << L" of " << maxPages;
bottomCenter = strstream.str();
return RV_CONTINUE;
}
// Run a JS alert message. Return RV_CONTINUE to display the default alert
// or RV_HANDLED if you displayed a custom alert.
virtual RetVal HandleJSAlert(CefRefPtr<CefBrowser> browser,
CefRefPtr<CefFrame> frame,
const std::wstring& message)
{
return RV_CONTINUE;
}
// Run a JS confirm request. Return RV_CONTINUE to display the default alert
// or RV_HANDLED if you displayed a custom alert. If you handled the alert
// set |retval| to true if the user accepted the confirmation.
virtual RetVal HandleJSConfirm(CefRefPtr<CefBrowser> browser,
CefRefPtr<CefFrame> frame,
const std::wstring& message, bool& retval)
{
return RV_CONTINUE;
}
// Run a JS prompt request. Return RV_CONTINUE to display the default prompt
// or RV_HANDLED if you displayed a custom prompt. If you handled the prompt
// set |retval| to true if the user accepted the prompt and request and
// |result| to the resulting value.
virtual RetVal HandleJSPrompt(CefRefPtr<CefBrowser> browser,
CefRefPtr<CefFrame> frame,
const std::wstring& message,
const std::wstring& defaultValue,
bool& retval,
std::wstring& result)
{
return RV_CONTINUE;
}
// Called just before a window is closed. The return value is currently
// ignored.
virtual RetVal HandleBeforeWindowClose(CefRefPtr<CefBrowser> browser)
{
if(m_BrowserHwnd == browser->GetWindowHandle())
{
// Free the browser pointer so that the browser can be destroyed
m_Browser = NULL;
}
return RV_CONTINUE;
}
// Called when the browser component is about to loose focus. For instance,
// if focus was on the last HTML element and the user pressed the TAB key.
// The return value is currently ignored.
virtual RetVal HandleTakeFocus(CefRefPtr<CefBrowser> browser, bool reverse)
{
return RV_CONTINUE;
}
// Event called for binding to a frame's JavaScript global object. The
// return value is currently ignored.
virtual RetVal HandleJSBinding(CefRefPtr<CefBrowser> browser,
CefRefPtr<CefFrame> frame,
CefRefPtr<CefV8Value> object)
{
// Create the new V8 object.
CefRefPtr<CefV8Value> testObjPtr = CefV8Value::CreateObject(NULL);
// Add the new V8 object to the global window object with the name
// "cef_test".
object->SetValue(L"cef_test", testObjPtr);
// Create an instance of ClientV8FunctionHandler as the V8 handler.
CefRefPtr<CefV8Handler> handlerPtr = new ClientV8FunctionHandler();
// Add a new V8 function to the cef_test object with the name "Dump".
testObjPtr->SetValue(L"Dump",
CefV8Value::CreateFunction(L"Dump", handlerPtr));
// Add a new V8 function to the cef_test object with the name "Call".
testObjPtr->SetValue(L"Call",
CefV8Value::CreateFunction(L"Call", handlerPtr));
return RV_HANDLED;
}
// Called when the browser component is requesting focus. |isWidget| will be
// true if the focus is requested for a child widget of the browser window.
// Return RV_CONTINUE to allow the focus to be set or RV_HANDLED to cancel
// setting the focus.
virtual RetVal HandleSetFocus(CefRefPtr<CefBrowser> browser,
bool isWidget)
{
return RV_CONTINUE;
}
// Retrieve the current navigation state flags
void GetNavState(bool &isLoading, bool &canGoBack, bool &canGoForward)
{
Lock();
isLoading = m_bLoading;
canGoBack = m_bCanGoBack;
canGoForward = m_bCanGoForward;
Unlock();
}
void SetMainHwnd(HWND hwnd)
{
Lock();
m_MainHwnd = hwnd;
Unlock();
}
void SetEditHwnd(HWND hwnd)
{
Lock();
m_EditHwnd = hwnd;
Unlock();
}
CefRefPtr<CefBrowser> GetBrowser()
{
return m_Browser;
}
HWND GetBrowserHwnd()
{
return m_BrowserHwnd;
}
protected:
// The child browser window
CefRefPtr<CefBrowser> m_Browser;
// The main frame window handle
HWND m_MainHwnd;
// The child browser window handle
HWND m_BrowserHwnd;
// The edit window handle
HWND m_EditHwnd;
// True if the page is currently loading
bool m_bLoading;
// True if the user can navigate backwards
bool m_bCanGoBack;
// True if the user can navigate forwards
bool m_bCanGoForward;
};
//
// FUNCTION: WndProc(HWND, UINT, WPARAM, LPARAM)
//
// PURPOSE: Processes messages for the main window.
//
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
static CefRefPtr<ClientHandler> handler;
static HWND backWnd = NULL, forwardWnd = NULL, reloadWnd = NULL,
stopWnd = NULL, editWnd = NULL;
static WNDPROC editWndOldProc = NULL;
int wmId, wmEvent;
PAINTSTRUCT ps;
HDC hdc;
if(hWnd == editWnd)
{
// Callback for the edit window
switch (message)
{
case WM_CHAR:
if (wParam == VK_RETURN && handler.get())
{
// When the user hits the enter key load the URL
CefRefPtr<CefBrowser> browser = handler->GetBrowser();
wchar_t strPtr[MAX_URL_LENGTH] = {0};
*((LPWORD)strPtr) = MAX_URL_LENGTH;
LRESULT strLen = SendMessage(hWnd, EM_GETLINE, 0, (LPARAM)strPtr);
if (strLen > 0)
browser->GetMainFrame()->LoadURL(strPtr);
return 0;
}
}
return (LRESULT)CallWindowProc(editWndOldProc, hWnd, message, wParam, lParam);
}
else
{
// Callback for the main window
switch (message)
{
case WM_CREATE:
{
// Create the single static handler class instance
handler = new ClientHandler();
handler->SetMainHwnd(hWnd);
// Create the child windows used for navigation
RECT rect;
int x = 0;
GetClientRect(hWnd, &rect);
backWnd = CreateWindow(L"BUTTON", L"Back",
WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON
| WS_DISABLED, x, 0, BUTTON_WIDTH, URLBAR_HEIGHT,
hWnd, (HMENU) IDC_NAV_BACK, hInst, 0);
x += BUTTON_WIDTH;
forwardWnd = CreateWindow(L"BUTTON", L"Forward",
WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON
| WS_DISABLED, x, 0, BUTTON_WIDTH,
URLBAR_HEIGHT, hWnd, (HMENU) IDC_NAV_FORWARD,
hInst, 0);
x += BUTTON_WIDTH;
reloadWnd = CreateWindow(L"BUTTON", L"Reload",
WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON
| WS_DISABLED, x, 0, BUTTON_WIDTH,
URLBAR_HEIGHT, hWnd, (HMENU) IDC_NAV_RELOAD,
hInst, 0);
x += BUTTON_WIDTH;
stopWnd = CreateWindow(L"BUTTON", L"Stop",
WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON
| WS_DISABLED, x, 0, BUTTON_WIDTH, URLBAR_HEIGHT,
hWnd, (HMENU) IDC_NAV_STOP, hInst, 0);
x += BUTTON_WIDTH;
editWnd = CreateWindow(L"EDIT", 0,
WS_CHILD | WS_VISIBLE | WS_BORDER | ES_LEFT |
ES_AUTOVSCROLL | ES_AUTOHSCROLL| WS_DISABLED,
x, 0, rect.right - BUTTON_WIDTH * 4,
URLBAR_HEIGHT, hWnd, 0, hInst, 0);
// Assign the edit window's WNDPROC to this function so that we can
// capture the enter key
editWndOldProc =
reinterpret_cast<WNDPROC>(GetWindowLongPtr(editWnd, GWLP_WNDPROC));
SetWindowLongPtr(editWnd, GWLP_WNDPROC,
reinterpret_cast<LONG_PTR>(WndProc));
handler->SetEditHwnd(editWnd);
rect.top += URLBAR_HEIGHT;
CefWindowInfo info;
// Initialize window info to the defaults for a child window
info.SetAsChild(hWnd, rect);
// Creat the new child child browser window
CefBrowser::CreateBrowser(info, false,
static_cast<CefRefPtr<CefHandler>>(handler),
L"http://www.google.com");
// Start the timer that will be used to update child window state
SetTimer(hWnd, 1, 250, NULL);
}
return 0;
case WM_TIMER:
if(handler.get() && handler->GetBrowserHwnd())
{
// Retrieve the current navigation state
bool isLoading, canGoBack, canGoForward;
handler->GetNavState(isLoading, canGoBack, canGoForward);
// Update the status of child windows
EnableWindow(editWnd, TRUE);
EnableWindow(backWnd, canGoBack);
EnableWindow(forwardWnd, canGoForward);
EnableWindow(reloadWnd, !isLoading);
EnableWindow(stopWnd, isLoading);
}
return 0;
case WM_COMMAND:
{
CefRefPtr<CefBrowser> browser;
if(handler.get())
browser = handler->GetBrowser();
wmId = LOWORD(wParam);
wmEvent = HIWORD(wParam);
// Parse the menu selections:
switch (wmId)
{
case IDM_ABOUT:
DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);
return 0;
case IDM_EXIT:
DestroyWindow(hWnd);
return 0;
case IDC_NAV_BACK: // Back button
if(browser.get())
browser->GoBack();
return 0;
case IDC_NAV_FORWARD: // Forward button
if(browser.get())
browser->GoForward();
return 0;
case IDC_NAV_RELOAD: // Reload button
if(browser.get())
browser->Reload();
return 0;
case IDC_NAV_STOP: // Stop button
if(browser.get())
browser->StopLoad();
return 0;
case ID_TESTS_JAVASCRIPT_HANDLER: // Test the V8 function handler
if(browser.get())
{
std::wstring html =
L"<html><body>ClientV8FunctionHandler says:<br><pre>"
L"<script language=\"JavaScript\">"
L"document.writeln(window.cef_test.Dump(false, 1, 7.6654,'bar',"
L" [false,true],[5, 7.654, 1, 'foo', [true, 'bar'], 8]));"
L"document.writeln(window.cef_test.Dump(cef));"
L"document.writeln("
L" window.cef_test.Call(cef.test.test_object, 'GetMessage'));"
L"function my_object() {"
L" var obj = {};"
L" (function() {"
L" obj.GetMessage = function(a) {"
L" return 'Calling a function with value '+a+' on a user object succeeded.';"
L" };"
L" })();"
L" return obj;"
L"};"
L"document.writeln("
L" window.cef_test.Call(my_object, 'GetMessage', 'foobar'));"
L"</script>"
L"</pre></body></html>";
browser->GetMainFrame()->LoadString(html, L"about:blank");
}
return 0;
case ID_TESTS_JAVASCRIPT_HANDLER2: // Test the V8 extension handler
if(browser.get())
{
std::wstring html =
L"<html><body>ClientV8ExtensionHandler says:<br><pre>"
L"<script language=\"JavaScript\">"
L"cef.test.test_param ="
L" 'Assign and retrieve a value succeeded the first time.';"
L"document.writeln(cef.test.test_param);"
L"cef.test.test_param ="
L" 'Assign and retrieve a value succeeded the second time.';"
L"document.writeln(cef.test.test_param);"
L"var obj = cef.test.test_object();"
L"document.writeln(obj.param);"
L"document.writeln(obj.GetMessage());"
L"</script>"
L"</pre></body></html>";
browser->GetMainFrame()->LoadString(html, L"about:blank");
}
return 0;
case ID_TESTS_JAVASCRIPT_EXECUTE: // Test execution of javascript
if(browser.get())
{
browser->GetMainFrame()->ExecuteJavaScript(
L"alert('JavaScript execute works!');",
L"about:blank", 0);
}
return 0;
case ID_TESTS_PLUGIN: // Test the custom plugin
if(browser.get())
{
std::wstring html =
L"<html><body>Client Plugin:<br>"
L"<embed type=\"application/x-client-plugin\""
L"width=600 height=40>"
L"</body></html>";
browser->GetMainFrame()->LoadString(html, L"about:blank");
}
return 0;
case ID_TESTS_POPUP: // Test a popup window
if(browser.get())
{
browser->GetMainFrame()->ExecuteJavaScript(
L"window.open('http://www.google.com');",
L"about:blank", 0);
}
return 0;
}
}
break;
case WM_PAINT:
hdc = BeginPaint(hWnd, &ps);
EndPaint(hWnd, &ps);
return 0;
case WM_SETFOCUS:
if(handler.get() && handler->GetBrowserHwnd())
{
// Pass focus to the browser window
PostMessage(handler->GetBrowserHwnd(), WM_SETFOCUS, wParam, NULL);
}
return 0;
case WM_SIZE:
if(handler.get() && handler->GetBrowserHwnd())
{
// Resize the browser window and address bar to match the new frame
// window size
RECT rect;
GetClientRect(hWnd, &rect);
rect.top += URLBAR_HEIGHT;
int urloffset = rect.left + BUTTON_WIDTH * 4;
HDWP hdwp = BeginDeferWindowPos(1);
hdwp = DeferWindowPos(hdwp, editWnd, NULL, urloffset,
0, rect.right - urloffset, URLBAR_HEIGHT, SWP_NOZORDER);
hdwp = DeferWindowPos(hdwp, handler->GetBrowserHwnd(), NULL,
rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top,
SWP_NOZORDER);
EndDeferWindowPos(hdwp);
}
break;
case WM_ERASEBKGND:
if(handler.get() && handler->GetBrowserHwnd())
{
// Dont erase the background if the browser window has been loaded
// (this avoids flashing)
return 0;
}
break;
case WM_DESTROY:
// The frame window has exited
KillTimer(hWnd, 1);
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hWnd, message, wParam, lParam);
}
}
// Message handler for about box.
INT_PTR CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
UNREFERENCED_PARAMETER(lParam);
switch (message)
{
case WM_INITDIALOG:
return (INT_PTR)TRUE;
case WM_COMMAND:
if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)
{
EndDialog(hDlg, LOWORD(wParam));
return (INT_PTR)TRUE;
}
break;
}
return (INT_PTR)FALSE;
}
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