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cef/libcef/browser/browser_host_impl_win.cc

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// Copyright (c) 2012 The Chromium Embedded Framework Authors.
// Portions copyright (c) 2011 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 "libcef/browser/browser_host_impl.h"
#include <commdlg.h>
#include <dwmapi.h>
#include <shellapi.h>
#include <wininet.h>
#include <winspool.h>
#include "libcef/browser/thread_util.h"
#include "base/i18n/case_conversion.h"
#include "base/string_util.h"
#include "base/utf_string_conversions.h"
#include "base/win/registry.h"
#include "base/win/windows_version.h"
#include "content/public/browser/native_web_keyboard_event.h"
#include "content/public/browser/web_contents_view.h"
#include "content/public/common/file_chooser_params.h"
#include "grit/cef_strings.h"
#include "grit/ui_strings.h"
#include "net/base/mime_util.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/win/hwnd_util.h"
#pragma comment(lib, "dwmapi.lib")
namespace {
bool IsAeroGlassEnabled() {
if (base::win::GetVersion() < base::win::VERSION_VISTA)
return false;
BOOL enabled = FALSE;
return SUCCEEDED(DwmIsCompositionEnabled(&enabled)) && enabled;
}
void SetAeroGlass(HWND hWnd) {
if (!IsAeroGlassEnabled())
return;
// Make the whole window transparent.
MARGINS mgMarInset = { -1, -1, -1, -1 };
DwmExtendFrameIntoClientArea(hWnd, &mgMarInset);
}
void WriteTextToFile(const std::string& data, const std::wstring& file_path) {
FILE* fp;
errno_t err = _wfopen_s(&fp, file_path.c_str(), L"wt");
if (err)
return;
fwrite(data.c_str(), 1, data.size(), fp);
fclose(fp);
}
// From ui/base/dialogs/select_file_dialog_win.cc.
// Get the file type description from the registry. This will be "Text Document"
// for .txt files, "JPEG Image" for .jpg files, etc. If the registry doesn't
// have an entry for the file type, we return false, true if the description was
// found. 'file_ext' must be in form ".txt".
static bool GetRegistryDescriptionFromExtension(const std::wstring& file_ext,
std::wstring* reg_description) {
DCHECK(reg_description);
base::win::RegKey reg_ext(HKEY_CLASSES_ROOT, file_ext.c_str(), KEY_READ);
std::wstring reg_app;
if (reg_ext.ReadValue(NULL, &reg_app) == ERROR_SUCCESS && !reg_app.empty()) {
base::win::RegKey reg_link(HKEY_CLASSES_ROOT, reg_app.c_str(), KEY_READ);
if (reg_link.ReadValue(NULL, reg_description) == ERROR_SUCCESS)
return true;
}
return false;
}
// Set up a filter for a Save/Open dialog, which will consist of |file_ext| file
// extensions (internally separated by semicolons), |ext_desc| as the text
// descriptions of the |file_ext| types (optional), and (optionally) the default
// 'All Files' view. The purpose of the filter is to show only files of a
// particular type in a Windows Save/Open dialog box. The resulting filter is
// returned. The filters created here are:
// 1. only files that have 'file_ext' as their extension
// 2. all files (only added if 'include_all_files' is true)
// Example:
// file_ext: { "*.txt", "*.htm;*.html" }
// ext_desc: { "Text Document" }
// returned: "Text Document\0*.txt\0HTML Document\0*.htm;*.html\0"
// "All Files\0*.*\0\0" (in one big string)
// If a description is not provided for a file extension, it will be retrieved
// from the registry. If the file extension does not exist in the registry, it
// will be omitted from the filter, as it is likely a bogus extension.
std::wstring FormatFilterForExtensions(
const std::vector<std::wstring>& file_ext,
const std::vector<std::wstring>& ext_desc,
bool include_all_files) {
const std::wstring all_ext = L"*.*";
const std::wstring all_desc =
l10n_util::GetStringUTF16(IDS_APP_SAVEAS_ALL_FILES) +
L" (" + all_ext + L")";
DCHECK(file_ext.size() >= ext_desc.size());
if (file_ext.empty())
include_all_files = true;
std::wstring result;
for (size_t i = 0; i < file_ext.size(); ++i) {
std::wstring ext = file_ext[i];
std::wstring desc;
if (i < ext_desc.size())
desc = ext_desc[i];
if (ext.empty()) {
// Force something reasonable to appear in the dialog box if there is no
// extension provided.
include_all_files = true;
continue;
}
if (desc.empty()) {
DCHECK(ext.find(L'.') != std::wstring::npos);
std::wstring first_extension = ext.substr(ext.find(L'.'));
size_t first_separator_index = first_extension.find(L';');
if (first_separator_index != std::wstring::npos)
first_extension = first_extension.substr(0, first_separator_index);
// Find the extension name without the preceeding '.' character.
std::wstring ext_name = first_extension;
size_t ext_index = ext_name.find_first_not_of(L'.');
if (ext_index != std::wstring::npos)
ext_name = ext_name.substr(ext_index);
if (!GetRegistryDescriptionFromExtension(first_extension, &desc)) {
// The extension doesn't exist in the registry. Create a description
// based on the unknown extension type (i.e. if the extension is .qqq,
// the we create a description "QQQ File (.qqq)").
include_all_files = true;
desc = l10n_util::GetStringFUTF16(
IDS_APP_SAVEAS_EXTENSION_FORMAT,
base::i18n::ToUpper(WideToUTF16(ext_name)),
ext_name);
}
}
if (!desc.empty())
desc += L" (" + ext + L")";
else
desc = ext;
result.append(desc.c_str(), desc.size() + 1); // Append NULL too.
result.append(ext.c_str(), ext.size() + 1);
}
if (include_all_files) {
result.append(all_desc.c_str(), all_desc.size() + 1);
result.append(all_ext.c_str(), all_ext.size() + 1);
}
result.append(1, '\0'); // Double NULL required.
return result;
}
std::wstring GetDescriptionFromMimeType(const std::string& mime_type) {
// Check for wild card mime types and return an appropriate description.
static const struct {
const char* mime_type;
int string_id;
} kWildCardMimeTypes[] = {
{ "audio", IDS_APP_AUDIO_FILES },
{ "image", IDS_APP_IMAGE_FILES },
{ "text", IDS_APP_TEXT_FILES },
{ "video", IDS_APP_VIDEO_FILES },
};
for (size_t i = 0; i < arraysize(kWildCardMimeTypes); ++i) {
if (mime_type == std::string(kWildCardMimeTypes[i].mime_type) + "/*")
return l10n_util::GetStringUTF16(kWildCardMimeTypes[i].string_id);
}
return std::wstring();
}
std::wstring GetFilterStringFromAcceptTypes(
const std::vector<string16>& accept_types) {
std::vector<std::wstring> extensions;
std::vector<std::wstring> descriptions;
for (size_t i = 0; i < accept_types.size(); ++i) {
std::string ascii_type = UTF16ToASCII(accept_types[i]);
if (ascii_type.length()) {
// Just treat as extension if contains '.' as the first character.
if (ascii_type[0] == '.') {
extensions.push_back(L"*" + ASCIIToWide(ascii_type));
descriptions.push_back(std::wstring());
} else {
// Otherwise convert mime type to one or more extensions.
std::vector<FilePath::StringType> ext;
std::wstring ext_str;
net::GetExtensionsForMimeType(ascii_type, &ext);
if (ext.size() > 0) {
for (size_t x = 0; x < ext.size(); ++x) {
if (x != 0)
ext_str += L";";
ext_str += L"*." + ext[x];
}
extensions.push_back(ext_str);
descriptions.push_back(GetDescriptionFromMimeType(ascii_type));
}
}
}
}
return FormatFilterForExtensions(extensions, descriptions, true);
}
// from chrome/browser/views/shell_dialogs_win.cc
bool RunOpenFileDialog(const content::FileChooserParams& params,
HWND owner,
FilePath* path) {
OPENFILENAME ofn;
// We must do this otherwise the ofn's FlagsEx may be initialized to random
// junk in release builds which can cause the Places Bar not to show up!
ZeroMemory(&ofn, sizeof(ofn));
ofn.lStructSize = sizeof(ofn);
ofn.hwndOwner = owner;
// Consider default file name if any.
FilePath default_file_name(params.default_file_name);
wchar_t filename[MAX_PATH] = {0};
ofn.lpstrFile = filename;
ofn.nMaxFile = MAX_PATH;
std::wstring directory;
if (!default_file_name.empty()) {
base::wcslcpy(filename, default_file_name.value().c_str(),
arraysize(filename));
directory = default_file_name.DirName().value();
ofn.lpstrInitialDir = directory.c_str();
}
std::wstring title;
if (!params.title.empty())
title = params.title;
else
title = l10n_util::GetStringUTF16(IDS_OPEN_FILE_DIALOG_TITLE);
if (!title.empty())
ofn.lpstrTitle = title.c_str();
// We use OFN_NOCHANGEDIR so that the user can rename or delete the directory
// without having to close Chrome first.
ofn.Flags = OFN_FILEMUSTEXIST | OFN_NOCHANGEDIR | OFN_EXPLORER |
OFN_ENABLESIZING;
std::wstring filter = GetFilterStringFromAcceptTypes(params.accept_types);
if (!filter.empty())
ofn.lpstrFilter = filter.c_str();
bool success = !!GetOpenFileName(&ofn);
if (success)
*path = FilePath(filename);
return success;
}
bool RunOpenMultiFileDialog(const content::FileChooserParams& params,
HWND owner,
std::vector<FilePath>* paths) {
OPENFILENAME ofn;
// We must do this otherwise the ofn's FlagsEx may be initialized to random
// junk in release builds which can cause the Places Bar not to show up!
ZeroMemory(&ofn, sizeof(ofn));
ofn.lStructSize = sizeof(ofn);
ofn.hwndOwner = owner;
scoped_array<wchar_t> filename(new wchar_t[UNICODE_STRING_MAX_CHARS]);
filename[0] = 0;
ofn.lpstrFile = filename.get();
ofn.nMaxFile = UNICODE_STRING_MAX_CHARS;
std::wstring title;
if (!params.title.empty())
title = params.title;
else
title = l10n_util::GetStringUTF16(IDS_OPEN_FILES_DIALOG_TITLE);
if (!title.empty())
ofn.lpstrTitle = title.c_str();
// We use OFN_NOCHANGEDIR so that the user can rename or delete the directory
// without having to close Chrome first.
ofn.Flags = OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST | OFN_EXPLORER |
OFN_HIDEREADONLY | OFN_ALLOWMULTISELECT | OFN_ENABLESIZING;
std::wstring filter = GetFilterStringFromAcceptTypes(params.accept_types);
if (!filter.empty())
ofn.lpstrFilter = filter.c_str();
bool success = !!GetOpenFileName(&ofn);
if (success) {
std::vector<FilePath> files;
const wchar_t* selection = ofn.lpstrFile;
while (*selection) { // Empty string indicates end of list.
files.push_back(FilePath(selection));
// Skip over filename and null-terminator.
selection += files.back().value().length() + 1;
}
if (files.empty()) {
success = false;
} else if (files.size() == 1) {
// When there is one file, it contains the path and filename.
paths->swap(files);
} else {
// Otherwise, the first string is the path, and the remainder are
// filenames.
std::vector<FilePath>::iterator path = files.begin();
for (std::vector<FilePath>::iterator file = path + 1;
file != files.end(); ++file) {
paths->push_back(path->Append(*file));
}
}
}
return success;
}
bool RunSaveFileDialog(const content::FileChooserParams& params,
HWND owner,
FilePath* path) {
OPENFILENAME ofn;
// We must do this otherwise the ofn's FlagsEx may be initialized to random
// junk in release builds which can cause the Places Bar not to show up!
ZeroMemory(&ofn, sizeof(ofn));
ofn.lStructSize = sizeof(ofn);
ofn.hwndOwner = owner;
// Consider default file name if any.
FilePath default_file_name(params.default_file_name);
wchar_t filename[MAX_PATH] = {0};
ofn.lpstrFile = filename;
ofn.nMaxFile = MAX_PATH;
std::wstring directory;
if (!default_file_name.empty()) {
base::wcslcpy(filename, default_file_name.value().c_str(),
arraysize(filename));
directory = default_file_name.DirName().value();
ofn.lpstrInitialDir = directory.c_str();
}
std::wstring title;
if (!params.title.empty())
title = params.title;
else
title = l10n_util::GetStringUTF16(IDS_SAVE_AS_DIALOG_TITLE);
if (!title.empty())
ofn.lpstrTitle = title.c_str();
// We use OFN_NOCHANGEDIR so that the user can rename or delete the directory
// without having to close Chrome first.
ofn.Flags = OFN_OVERWRITEPROMPT | OFN_EXPLORER | OFN_ENABLESIZING |
OFN_NOCHANGEDIR | OFN_PATHMUSTEXIST;
std::wstring filter = GetFilterStringFromAcceptTypes(params.accept_types);
if (!filter.empty())
ofn.lpstrFilter = filter.c_str();
bool success = !!GetSaveFileName(&ofn);
if (success)
*path = FilePath(filename);
return success;
}
// According to Mozilla in uriloader/exthandler/win/nsOSHelperAppService.cpp:
// "Some versions of windows (Win2k before SP3, Win XP before SP1) crash in
// ShellExecute on long URLs (bug 161357 on bugzilla.mozilla.org). IE 5 and 6
// support URLS of 2083 chars in length, 2K is safe."
const int kMaxAddressLengthChars = 2048;
bool HasExternalHandler(const std::string& scheme) {
base::win::RegKey key;
const std::wstring registry_path =
ASCIIToWide(scheme + "\\shell\\open\\command");
key.Open(HKEY_CLASSES_ROOT, registry_path.c_str(), KEY_READ);
if (key.Valid()) {
DWORD size = 0;
key.ReadValue(NULL, NULL, &size, NULL);
if (size > 2) {
// ShellExecute crashes the process when the command is empty.
// We check for "2" because it always returns the trailing NULL.
return true;
}
}
return false;
}
} // namespace
// static
void CefBrowserHostImpl::RegisterWindowClass() {
// Register the window class
WNDCLASSEX wcex = {
/* cbSize = */ sizeof(WNDCLASSEX),
/* style = */ CS_HREDRAW | CS_VREDRAW,
/* lpfnWndProc = */ CefBrowserHostImpl::WndProc,
/* cbClsExtra = */ 0,
/* cbWndExtra = */ 0,
/* hInstance = */ ::GetModuleHandle(NULL),
/* hIcon = */ NULL,
/* hCursor = */ LoadCursor(NULL, IDC_ARROW),
/* hbrBackground = */ 0,
/* lpszMenuName = */ NULL,
/* lpszClassName = */ CefBrowserHostImpl::GetWndClass(),
/* hIconSm = */ NULL,
};
RegisterClassEx(&wcex);
}
// static
LPCTSTR CefBrowserHostImpl::GetWndClass() {
return L"CefBrowserWindow";
}
// static
LRESULT CALLBACK CefBrowserHostImpl::WndProc(HWND hwnd, UINT message,
WPARAM wParam, LPARAM lParam) {
CefBrowserHostImpl* browser =
static_cast<CefBrowserHostImpl*>(ui::GetWindowUserData(hwnd));
switch (message) {
case WM_CLOSE:
if (browser) {
bool handled(false);
if (browser->client_.get()) {
CefRefPtr<CefLifeSpanHandler> handler =
browser->client_->GetLifeSpanHandler();
if (handler.get()) {
// Give the client a chance to handle this one.
handled = handler->DoClose(browser);
}
}
if (handled)
return 0;
// We are our own parent in this case.
browser->ParentWindowWillClose();
}
break;
case WM_DESTROY:
if (browser) {
// Clear the user data pointer.
ui::SetWindowUserData(hwnd, NULL);
// Destroy the browser.
browser->DestroyBrowser();
// Release the reference added in PlatformCreateWindow().
browser->Release();
}
return 0;
case WM_SIZE:
// Minimizing resizes the window to 0x0 which causes our layout to go all
// screwy, so we just ignore it.
if (wParam != SIZE_MINIMIZED && browser) {
// resize the web view window to the full size of the browser window
RECT rc;
GetClientRect(hwnd, &rc);
MoveWindow(browser->GetContentView(), 0, 0, rc.right, rc.bottom,
TRUE);
}
return 0;
case WM_SETFOCUS:
if (browser)
browser->OnSetFocus(FOCUS_SOURCE_SYSTEM);
return 0;
case WM_ERASEBKGND:
return 0;
case WM_DWMCOMPOSITIONCHANGED:
// Message sent to top-level windows when composition has been enabled or
// disabled.
if (browser && browser->window_info_.transparent_painting)
SetAeroGlass(hwnd);
break;
}
return DefWindowProc(hwnd, message, wParam, lParam);
}
bool CefBrowserHostImpl::PlatformCreateWindow() {
std::wstring windowName(CefString(&window_info_.window_name));
// Create the new browser window.
window_info_.window = CreateWindowEx(window_info_.ex_style,
GetWndClass(), windowName.c_str(), window_info_.style,
window_info_.x, window_info_.y, window_info_.width,
window_info_.height, window_info_.parent_window, window_info_.menu,
::GetModuleHandle(NULL), NULL);
// It's possible for CreateWindowEx to fail if the parent window was
// destroyed between the call to CreateBrowser and the above one.
DCHECK(window_info_.window != NULL);
if (!window_info_.window)
return false;
if (window_info_.transparent_painting &&
!(window_info_.style & WS_CHILD)) {
// Transparent top-level windows will be given "sheet of glass" effect.
SetAeroGlass(window_info_.window);
}
// Set window user data to this object for future reference from the window
// procedure.
ui::SetWindowUserData(window_info_.window, this);
// Add a reference that will be released in the WM_DESTROY handler.
AddRef();
// Parent the TabContents to the browser window.
SetParent(web_contents_->GetView()->GetNativeView(), window_info_.window);
// Size the web view window to the browser window.
RECT cr;
GetClientRect(window_info_.window, &cr);
// Respect the WS_VISIBLE window style when setting the window's position.
UINT flags = SWP_NOZORDER | SWP_SHOWWINDOW;
if (!(window_info_.style & WS_VISIBLE))
flags |= SWP_NOACTIVATE;
SetWindowPos(GetContentView(), NULL, cr.left, cr.top, cr.right,
cr.bottom, flags);
return true;
}
void CefBrowserHostImpl::PlatformCloseWindow() {
if (window_info_.window != NULL)
PostMessage(window_info_.window, WM_CLOSE, 0, 0);
}
void CefBrowserHostImpl::PlatformSizeTo(int width, int height) {
RECT rect = {0, 0, width, height};
DWORD style = GetWindowLong(window_info_.window, GWL_STYLE);
DWORD ex_style = GetWindowLong(window_info_.window, GWL_EXSTYLE);
bool has_menu = !(style & WS_CHILD) && (GetMenu(window_info_.window) != NULL);
// The size value is for the client area. Calculate the whole window size
// based on the current style.
AdjustWindowRectEx(&rect, style, has_menu, ex_style);
// Size the window.
SetWindowPos(window_info_.window, NULL, 0, 0, rect.right,
rect.bottom, SWP_NOZORDER | SWP_NOMOVE | SWP_NOACTIVATE);
}
CefWindowHandle CefBrowserHostImpl::PlatformGetWindowHandle() {
return window_info_.window;
}
bool CefBrowserHostImpl::PlatformViewText(const std::string& text) {
CEF_REQUIRE_UIT();
DWORD dwRetVal;
DWORD dwBufSize = 512;
TCHAR lpPathBuffer[512];
UINT uRetVal;
TCHAR szTempName[512];
dwRetVal = GetTempPath(dwBufSize, // length of the buffer
lpPathBuffer); // buffer for path
if (dwRetVal > dwBufSize || (dwRetVal == 0))
return false;
// Create a temporary file.
uRetVal = GetTempFileName(lpPathBuffer, // directory for tmp files
TEXT("src"), // temp file name prefix
0, // create unique name
szTempName); // buffer for name
if (uRetVal == 0)
return false;
size_t len = wcslen(szTempName);
wcscpy(szTempName + len - 3, L"txt");
WriteTextToFile(text, szTempName);
HWND frameWnd = GetAncestor(PlatformGetWindowHandle(), GA_ROOT);
int errorCode = reinterpret_cast<int>(ShellExecute(frameWnd, L"open",
szTempName, NULL, NULL, SW_SHOWNORMAL));
if (errorCode <= 32)
return false;
return true;
}
void CefBrowserHostImpl::PlatformHandleKeyboardEvent(
const content::NativeWebKeyboardEvent& event) {
// Any unhandled keyboard/character messages are sent to DefWindowProc so that
// shortcut keys work correctly.
DefWindowProc(event.os_event.hwnd, event.os_event.message,
event.os_event.wParam, event.os_event.lParam);
}
void CefBrowserHostImpl::PlatformRunFileChooser(
const content::FileChooserParams& params,
RunFileChooserCallback callback) {
std::vector<FilePath> files;
if (params.mode == content::FileChooserParams::Open) {
FilePath file;
if (RunOpenFileDialog(params, PlatformGetWindowHandle(), &file))
files.push_back(file);
} else if (params.mode == content::FileChooserParams::OpenMultiple) {
RunOpenMultiFileDialog(params, PlatformGetWindowHandle(), &files);
} else if (params.mode == content::FileChooserParams::Save) {
FilePath file;
if (RunSaveFileDialog(params, PlatformGetWindowHandle(), &file))
files.push_back(file);
} else {
NOTIMPLEMENTED();
}
callback.Run(files);
}
void CefBrowserHostImpl::PlatformHandleExternalProtocol(const GURL& url) {
if (CEF_CURRENTLY_ON_FILET()) {
if (!HasExternalHandler(url.scheme()))
return;
const std::string& address = url.spec();
if (address.length() > kMaxAddressLengthChars)
return;
ShellExecuteA(NULL, "open", address.c_str(), NULL, NULL, SW_SHOWNORMAL);
} else {
// Execute on the FILE thread.
CEF_POST_TASK(CEF_FILET,
base::Bind(&CefBrowserHostImpl::PlatformHandleExternalProtocol, this,
url));
}
}
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