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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "chrome_frame/bho_loader.h" | |
| 6 | |
| 7 #include <atlbase.h> | |
| 8 #include <atlcomcli.h> | |
| 9 #include <exdisp.h> | |
| 10 | |
| 11 #include "chrome_frame/chrome_frame_helper_util.h" | |
| 12 #include "chrome_frame/chrome_tab.h" | |
| 13 #include "chrome_frame/event_hooker.h" | |
| 14 | |
| 15 | |
| 16 // Describes the window class we look for. | |
| 17 const wchar_t kStatusBarWindowClass[] = L"msctls_statusbar32"; | |
| 18 | |
| 19 // On IE9, the status bar is disabled by default, so we look for an | |
| 20 // AsyncBoundaryLayer window instead. | |
| 21 const wchar_t kAsyncBoundaryDnWindow[] = L"asynclayerboundarydn\0"; | |
| 22 | |
| 23 BHOLoader::BHOLoader() : hooker_(new EventHooker()) { | |
| 24 } | |
| 25 | |
| 26 BHOLoader::~BHOLoader() { | |
| 27 if (hooker_) { | |
| 28 delete hooker_; | |
| 29 hooker_ = NULL; | |
| 30 } | |
| 31 } | |
| 32 | |
| 33 void BHOLoader::OnHookEvent(DWORD event, HWND window) { | |
| 34 // Step 1: Make sure that we are in a process named iexplore.exe. | |
| 35 if (IsNamedProcess(L"iexplore.exe")) { | |
| 36 if (!IsWindowOfClass(window, kStatusBarWindowClass) && | |
| 37 !IsWindowOfClass(window, kAsyncBoundaryDnWindow)) { | |
| 38 return; | |
| 39 } else { | |
| 40 // We have the right sort of window, check to make sure it was created | |
| 41 // on the current thread. | |
| 42 DWORD thread_id = GetWindowThreadProcessId(window, NULL); | |
| 43 _ASSERTE(thread_id == GetCurrentThreadId()); | |
| 44 } | |
| 45 | |
| 46 // Step 2: Check to see if the window is of the right class. | |
| 47 HWND browser_hwnd = NULL; | |
| 48 if (IsWindowOfClass(window, kStatusBarWindowClass)) { | |
| 49 // For IE8 and under, IE loads BHOs in the WM_CREATE handler of the tab | |
| 50 // window approximately after it creates the status bar window. To be as | |
| 51 // close to IE as possible in our simulation on BHO loading, we watch for | |
| 52 // the status bar to be created and do our simulated BHO loading at that | |
| 53 // time. | |
| 54 browser_hwnd = GetParent(window); | |
| 55 } else if (IsWindowOfClass(window, kAsyncBoundaryDnWindow)) { | |
| 56 // For IE9, the status bar is disabled by default, so we look for an | |
| 57 // AsyncBoundaryWindow to be created. When we find that, look for a | |
| 58 // child window owned by the current thread named "tabwindowclass". | |
| 59 // That will be our browser window. | |
| 60 browser_hwnd = RecurseFindWindow(NULL, L"tabwindowclass", NULL, | |
| 61 GetCurrentThreadId(), | |
| 62 GetCurrentProcessId()); | |
| 63 _ASSERTE(NULL != browser_hwnd); | |
| 64 } | |
| 65 | |
| 66 if (browser_hwnd != NULL) { | |
| 67 // Step 3: | |
| 68 // Parent window of status bar window is the web browser window. Try to | |
| 69 // get its IWebBrowser2 interface | |
| 70 CComPtr<IWebBrowser2> browser; | |
| 71 UtilGetWebBrowserObjectFromWindow(browser_hwnd, __uuidof(browser), | |
| 72 reinterpret_cast<void**>(&browser)); | |
| 73 if (browser) { | |
| 74 if (IsSystemLevelChromeFrameInstalled()) { | |
| 75 // We're in the right place, but a system-level installation has | |
| 76 // appeared. We should leave now. | |
| 77 return; | |
| 78 } | |
| 79 | |
| 80 // Figure out if we're already in the property map. | |
| 81 wchar_t bho_clsid_as_string[MAX_PATH] = {0}; | |
| 82 StringFromGUID2(CLSID_ChromeFrameBHO, bho_clsid_as_string, | |
| 83 ARRAYSIZE(bho_clsid_as_string)); | |
| 84 CComBSTR bho_clsid_as_string_bstr(bho_clsid_as_string); | |
| 85 | |
| 86 CComVariant existing_bho; | |
| 87 HRESULT hr = browser->GetProperty(bho_clsid_as_string_bstr, | |
| 88 &existing_bho); | |
| 89 | |
| 90 if (V_VT(&existing_bho) != VT_DISPATCH && | |
| 91 V_VT(&existing_bho) != VT_UNKNOWN) { | |
| 92 // Step 4: | |
| 93 // We have the IWebBrowser2 interface. Now create the BHO instance | |
| 94 CComPtr<IObjectWithSite> bho_object; | |
| 95 hr = bho_object.CoCreateInstance(CLSID_ChromeFrameBHO, | |
| 96 NULL, | |
| 97 CLSCTX_INPROC_SERVER); | |
| 98 | |
| 99 _ASSERTE(bho_object); | |
| 100 if (SUCCEEDED(hr) && bho_object) { | |
| 101 // Step 5: | |
| 102 // Initialize the BHO by calling SetSite and passing it IWebBrowser2 | |
| 103 hr = bho_object->SetSite(browser); | |
| 104 _ASSERTE(bho_object); | |
| 105 if (SUCCEEDED(hr)) { | |
| 106 // Step 6: | |
| 107 // Now add the BHO to the collection of automation objects. This | |
| 108 // will ensure that BHO will be accessible from the web pages as | |
| 109 // any other BHO. Importantly, it will make sure that our BHO | |
| 110 // will be cleaned up at the right time along with other BHOs. | |
| 111 CComVariant object_variant(bho_object); | |
| 112 browser->PutProperty(bho_clsid_as_string_bstr, object_variant); | |
| 113 } | |
| 114 } | |
| 115 } | |
| 116 } | |
| 117 } | |
| 118 } | |
| 119 } | |
| 120 | |
| 121 bool BHOLoader::StartHook() { | |
| 122 return hooker_->StartHook(); | |
| 123 } | |
| 124 | |
| 125 void BHOLoader::StopHook() { | |
| 126 hooker_->StopHook(); | |
| 127 } | |
| 128 | |
| 129 BHOLoader* BHOLoader::GetInstance() { | |
| 130 static BHOLoader loader; | |
| 131 return &loader; | |
| 132 } | |
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Chromium Code Reviews
Issue 126143005:
Remove Chrome Frame code and resources. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src