1/*
2 * Copyright (C) 2006, 2007 Apple Inc.  All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "Pasteboard.h"
28
29#include "BitmapInfo.h"
30#include "CString.h"
31#include "ClipboardUtilitiesWin.h"
32#include "Document.h"
33#include "DocumentFragment.h"
34#include "Element.h"
35#include "Frame.h"
36#include "HitTestResult.h"
37#include "Image.h"
38#include "KURL.h"
39#include "Page.h"
40#include "Range.h"
41#include "RenderImage.h"
42#include "TextEncoding.h"
43#include "markup.h"
44
45namespace WebCore {
46
47static UINT HTMLClipboardFormat = 0;
48static UINT BookmarkClipboardFormat = 0;
49static UINT WebSmartPasteFormat = 0;
50
51static LRESULT CALLBACK PasteboardOwnerWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
52{
53    LRESULT lresult = 0;
54    LONG_PTR longPtr = GetWindowLongPtr(hWnd, 0);
55
56    switch(message) {
57    case WM_RENDERFORMAT:
58        // This message comes when SetClipboardData was sent a null data handle
59        // and now it's come time to put the data on the clipboard.
60        break;
61    case WM_RENDERALLFORMATS:
62        // This message comes when SetClipboardData was sent a null data handle
63        // and now this application is about to quit, so it must put data on
64        // the clipboard before it exits.
65        break;
66    case WM_DRAWCLIPBOARD:
67        break;
68    case WM_DESTROY:
69        break;
70    case WM_CHANGECBCHAIN:
71        break;
72    default:
73        lresult = DefWindowProc(hWnd, message, wParam, lParam);
74        break;
75    }
76    return lresult;
77}
78
79Pasteboard* Pasteboard::generalPasteboard()
80{
81    static Pasteboard* pasteboard = new Pasteboard;
82    return pasteboard;
83}
84
85Pasteboard::Pasteboard()
86{
87    // make a dummy HWND to be the Windows clipboard's owner
88    WNDCLASSEX wcex = {0};
89    wcex.cbSize = sizeof(WNDCLASSEX);
90    wcex.lpfnWndProc    = PasteboardOwnerWndProc;
91    wcex.hInstance      = Page::instanceHandle();
92    wcex.lpszClassName  = L"PasteboardOwnerWindowClass";
93    ::RegisterClassEx(&wcex);
94
95    m_owner = ::CreateWindow(L"PasteboardOwnerWindowClass", L"PasteboardOwnerWindow", 0, 0, 0, 0, 0,
96        HWND_MESSAGE, 0, 0, 0);
97
98    HTMLClipboardFormat = ::RegisterClipboardFormat(L"HTML Format");
99    BookmarkClipboardFormat = ::RegisterClipboardFormat(L"UniformResourceLocatorW");
100    WebSmartPasteFormat = ::RegisterClipboardFormat(L"WebKit Smart Paste Format");
101}
102
103void Pasteboard::clear()
104{
105    if (::OpenClipboard(m_owner)) {
106        ::EmptyClipboard();
107        ::CloseClipboard();
108    }
109}
110
111void Pasteboard::writeSelection(Range* selectedRange, bool canSmartCopyOrDelete, Frame* frame)
112{
113    clear();
114
115    // Put CF_HTML format on the pasteboard
116    if (::OpenClipboard(m_owner)) {
117        ExceptionCode ec = 0;
118        Vector<char> data;
119        markupToCF_HTML(createMarkup(selectedRange, 0, AnnotateForInterchange),
120            selectedRange->startContainer(ec)->document()->url().string(), data);
121        HGLOBAL cbData = createGlobalData(data);
122        if (!::SetClipboardData(HTMLClipboardFormat, cbData))
123            ::GlobalFree(cbData);
124        ::CloseClipboard();
125    }
126
127    // Put plain string on the pasteboard. CF_UNICODETEXT covers CF_TEXT as well
128    String str = frame->selectedText();
129    replaceNewlinesWithWindowsStyleNewlines(str);
130    replaceNBSPWithSpace(str);
131    if (::OpenClipboard(m_owner)) {
132        HGLOBAL cbData = createGlobalData(str);
133        if (!::SetClipboardData(CF_UNICODETEXT, cbData))
134            ::GlobalFree(cbData);
135        ::CloseClipboard();
136    }
137
138    // enable smart-replacing later on by putting dummy data on the pasteboard
139    if (canSmartCopyOrDelete) {
140        if (::OpenClipboard(m_owner)) {
141            ::SetClipboardData(WebSmartPasteFormat, NULL);
142            ::CloseClipboard();
143        }
144
145    }
146}
147
148void Pasteboard::writePlainText(const String& text)
149{
150    clear();
151
152    // Put plain string on the pasteboard. CF_UNICODETEXT covers CF_TEXT as well
153    String str = text;
154    replaceNewlinesWithWindowsStyleNewlines(str);
155    if (::OpenClipboard(m_owner)) {
156        HGLOBAL cbData = createGlobalData(str);
157        if (!::SetClipboardData(CF_UNICODETEXT, cbData))
158            ::GlobalFree(cbData);
159        ::CloseClipboard();
160    }
161}
162
163void Pasteboard::writeURL(const KURL& url, const String& titleStr, Frame* frame)
164{
165    ASSERT(!url.isEmpty());
166
167    clear();
168
169    String title(titleStr);
170    if (title.isEmpty()) {
171        title = url.lastPathComponent();
172        if (title.isEmpty())
173            title = url.host();
174    }
175
176    // write to clipboard in format com.apple.safari.bookmarkdata to be able to paste into the bookmarks view with appropriate title
177    if (::OpenClipboard(m_owner)) {
178        HGLOBAL cbData = createGlobalData(url, title);
179        if (!::SetClipboardData(BookmarkClipboardFormat, cbData))
180            ::GlobalFree(cbData);
181        ::CloseClipboard();
182    }
183
184    // write to clipboard in format CF_HTML to be able to paste into contenteditable areas as a link
185    if (::OpenClipboard(m_owner)) {
186        Vector<char> data;
187        markupToCF_HTML(urlToMarkup(url, title), "", data);
188        HGLOBAL cbData = createGlobalData(data);
189        if (!::SetClipboardData(HTMLClipboardFormat, cbData))
190            ::GlobalFree(cbData);
191        ::CloseClipboard();
192    }
193
194    // bare-bones CF_UNICODETEXT support
195    if (::OpenClipboard(m_owner)) {
196        HGLOBAL cbData = createGlobalData(url.string());
197        if (!::SetClipboardData(CF_UNICODETEXT, cbData))
198            ::GlobalFree(cbData);
199        ::CloseClipboard();
200    }
201}
202
203void Pasteboard::writeImage(Node* node, const KURL&, const String&)
204{
205    ASSERT(node && node->renderer() && node->renderer()->isImage());
206    RenderImage* renderer = toRenderImage(node->renderer());
207    CachedImage* cachedImage = renderer->cachedImage();
208    ASSERT(cachedImage);
209    Image* image = cachedImage->image();
210    ASSERT(image);
211
212    clear();
213
214    HDC dc = GetDC(0);
215    HDC compatibleDC = CreateCompatibleDC(0);
216    HDC sourceDC = CreateCompatibleDC(0);
217    HBITMAP resultBitmap = CreateCompatibleBitmap(dc, image->width(), image->height());
218    HBITMAP oldBitmap = (HBITMAP)SelectObject(compatibleDC, resultBitmap);
219
220    BitmapInfo bmInfo = BitmapInfo::create(image->size());
221
222    HBITMAP coreBitmap = CreateDIBSection(dc, &bmInfo, DIB_RGB_COLORS, 0, 0, 0);
223    HBITMAP oldSource = (HBITMAP)SelectObject(sourceDC, coreBitmap);
224    image->getHBITMAP(coreBitmap);
225
226    BLENDFUNCTION bf = {AC_SRC_OVER, 0, 255, AC_SRC_ALPHA};
227    AlphaBlend(compatibleDC, 0, 0, image->width(), image->height(),
228        sourceDC, 0, 0, image->width(), image->height(), bf);
229
230    SelectObject(compatibleDC, oldBitmap);
231    SelectObject(sourceDC, oldSource);
232
233    DeleteObject(oldBitmap);
234    DeleteObject(oldSource);
235    DeleteObject(coreBitmap);
236    ReleaseDC(0, dc);
237    DeleteDC(compatibleDC);
238    DeleteDC(sourceDC);
239
240    if (::OpenClipboard(m_owner)) {
241        ::SetClipboardData(CF_BITMAP, resultBitmap);
242        ::CloseClipboard();
243    }
244}
245
246bool Pasteboard::canSmartReplace()
247{
248    return ::IsClipboardFormatAvailable(WebSmartPasteFormat);
249}
250
251String Pasteboard::plainText(Frame* frame)
252{
253    if (::IsClipboardFormatAvailable(CF_UNICODETEXT) && ::OpenClipboard(m_owner)) {
254        HANDLE cbData = ::GetClipboardData(CF_UNICODETEXT);
255        if (cbData) {
256            UChar* buffer = (UChar*)::GlobalLock(cbData);
257            String fromClipboard(buffer);
258            ::GlobalUnlock(cbData);
259            ::CloseClipboard();
260            return fromClipboard;
261        } else
262            ::CloseClipboard();
263    }
264
265    if (::IsClipboardFormatAvailable(CF_TEXT) && ::OpenClipboard(m_owner)) {
266        HANDLE cbData = ::GetClipboardData(CF_TEXT);
267        if (cbData) {
268            char* buffer = (char*)::GlobalLock(cbData);
269            String fromClipboard(buffer);
270            ::GlobalUnlock(cbData);
271            ::CloseClipboard();
272            return fromClipboard;
273        } else
274            ::CloseClipboard();
275    }
276
277    return String();
278}
279
280PassRefPtr<DocumentFragment> Pasteboard::documentFragment(Frame* frame, PassRefPtr<Range> context, bool allowPlainText, bool& chosePlainText)
281{
282    chosePlainText = false;
283
284    if (::IsClipboardFormatAvailable(HTMLClipboardFormat) && ::OpenClipboard(m_owner)) {
285        // get data off of clipboard
286        HANDLE cbData = ::GetClipboardData(HTMLClipboardFormat);
287        if (cbData) {
288            SIZE_T dataSize = ::GlobalSize(cbData);
289            String cf_html(UTF8Encoding().decode((char*)::GlobalLock(cbData), dataSize));
290            ::GlobalUnlock(cbData);
291            ::CloseClipboard();
292
293            PassRefPtr<DocumentFragment> fragment = fragmentFromCF_HTML(frame->document(), cf_html);
294            if (fragment)
295                return fragment;
296        } else
297            ::CloseClipboard();
298    }
299
300    if (allowPlainText && ::IsClipboardFormatAvailable(CF_UNICODETEXT)) {
301        chosePlainText = true;
302        if (::OpenClipboard(m_owner)) {
303            HANDLE cbData = ::GetClipboardData(CF_UNICODETEXT);
304            if (cbData) {
305                UChar* buffer = (UChar*)GlobalLock(cbData);
306                String str(buffer);
307                ::GlobalUnlock( cbData );
308                ::CloseClipboard();
309                RefPtr<DocumentFragment> fragment = createFragmentFromText(context.get(), str);
310                if (fragment)
311                    return fragment.release();
312            } else
313                ::CloseClipboard();
314        }
315    }
316
317    if (allowPlainText && ::IsClipboardFormatAvailable(CF_TEXT)) {
318        chosePlainText = true;
319        if (::OpenClipboard(m_owner)) {
320            HANDLE cbData = ::GetClipboardData(CF_TEXT);
321            if (cbData) {
322                char* buffer = (char*)GlobalLock(cbData);
323                String str(buffer);
324                ::GlobalUnlock( cbData );
325                ::CloseClipboard();
326                RefPtr<DocumentFragment> fragment = createFragmentFromText(context.get(), str);
327                if (fragment)
328                    return fragment.release();
329            } else
330                ::CloseClipboard();
331        }
332    }
333
334    return 0;
335}
336
337} // namespace WebCore
338