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1 /*
2  * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Library General Public
6  * License as published by the Free Software Foundation; either
7  * version 2 of the License, or (at your option) any later version.
8  *
9  * This library is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12  * Library General Public License for more details.
13  *
14  * You should have received a copy of the GNU Library General Public License
15  * along with this library; see the file COPYING.LIB.  If not, write to
16  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17  * Boston, MA 02110-1301, USA.
18  *
19  */
20 
21 #include "config.h"
22 #include "RenderFileUploadControl.h"
23 
24 #include "Chrome.h"
25 #include "FileList.h"
26 #include "Frame.h"
27 #include "FrameView.h"
28 #include "GraphicsContext.h"
29 #include "HTMLInputElement.h"
30 #include "HTMLNames.h"
31 #include "ShadowElement.h"
32 #include "Icon.h"
33 #include "LocalizedStrings.h"
34 #include "Page.h"
35 #include "PaintInfo.h"
36 #include "RenderButton.h"
37 #include "RenderText.h"
38 #include "RenderTheme.h"
39 #include "RenderView.h"
40 #include "TextRun.h"
41 #include <math.h>
42 
43 using namespace std;
44 
45 namespace WebCore {
46 
47 using namespace HTMLNames;
48 
49 const int afterButtonSpacing = 4;
50 const int iconHeight = 16;
51 const int iconWidth = 16;
52 const int iconFilenameSpacing = 2;
53 const int defaultWidthNumChars = 34;
54 const int buttonShadowHeight = 2;
55 
RenderFileUploadControl(HTMLInputElement * input)56 RenderFileUploadControl::RenderFileUploadControl(HTMLInputElement* input)
57     : RenderBlock(input)
58 {
59     FileList* list = input->files();
60     Vector<String> filenames;
61     unsigned length = list ? list->length() : 0;
62     for (unsigned i = 0; i < length; ++i)
63         filenames.append(list->item(i)->path());
64     m_fileChooser = FileChooser::create(this, filenames);
65 }
66 
~RenderFileUploadControl()67 RenderFileUploadControl::~RenderFileUploadControl()
68 {
69     if (m_button)
70         m_button->detach();
71     m_fileChooser->disconnectClient();
72 }
73 
styleDidChange(StyleDifference diff,const RenderStyle * oldStyle)74 void RenderFileUploadControl::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
75 {
76     RenderBlock::styleDidChange(diff, oldStyle);
77     if (m_button)
78         m_button->renderer()->setStyle(createButtonStyle(style()));
79 }
80 
valueChanged()81 void RenderFileUploadControl::valueChanged()
82 {
83     // dispatchFormControlChangeEvent may destroy this renderer
84     RefPtr<FileChooser> fileChooser = m_fileChooser;
85 
86     HTMLInputElement* inputElement = static_cast<HTMLInputElement*>(node());
87     inputElement->setFileListFromRenderer(fileChooser->filenames());
88     inputElement->dispatchFormControlChangeEvent();
89 
90     // only repaint if it doesn't seem we have been destroyed
91     if (!fileChooser->disconnected())
92         repaint();
93 }
94 
allowsMultipleFiles()95 bool RenderFileUploadControl::allowsMultipleFiles()
96 {
97 #if ENABLE(DIRECTORY_UPLOAD)
98     if (allowsDirectoryUpload())
99       return true;
100 #endif
101 
102     HTMLInputElement* input = static_cast<HTMLInputElement*>(node());
103     return input->fastHasAttribute(multipleAttr);
104 }
105 
106 #if ENABLE(DIRECTORY_UPLOAD)
allowsDirectoryUpload()107 bool RenderFileUploadControl::allowsDirectoryUpload()
108 {
109     HTMLInputElement* input = static_cast<HTMLInputElement*>(node());
110     return input->fastHasAttribute(webkitdirectoryAttr);
111 }
112 
receiveDropForDirectoryUpload(const Vector<String> & paths)113 void RenderFileUploadControl::receiveDropForDirectoryUpload(const Vector<String>& paths)
114 {
115     if (Chrome* chromePointer = chrome())
116         chromePointer->enumerateChosenDirectory(paths[0], m_fileChooser.get());
117 }
118 #endif
119 
acceptTypes()120 String RenderFileUploadControl::acceptTypes()
121 {
122     return static_cast<HTMLInputElement*>(node())->accept();
123 }
124 
125 #if ENABLE(MEDIA_CAPTURE)
capture()126 String RenderFileUploadControl::capture()
127 {
128     return static_cast<HTMLInputElement*>(node())->capture();
129 }
130 #endif
131 
chooseIconForFiles(FileChooser * chooser,const Vector<String> & filenames)132 void RenderFileUploadControl::chooseIconForFiles(FileChooser* chooser, const Vector<String>& filenames)
133 {
134     if (Chrome* chromePointer = chrome())
135         chromePointer->chooseIconForFiles(filenames, chooser);
136 }
137 
click()138 void RenderFileUploadControl::click()
139 {
140     // Requires a user gesture to open the file dialog.
141     if (!frame() || !frame()->loader()->isProcessingUserGesture())
142         return;
143     if (Chrome* chromePointer = chrome())
144         chromePointer->runOpenPanel(frame(), m_fileChooser);
145 }
146 
chrome() const147 Chrome* RenderFileUploadControl::chrome() const
148 {
149     Frame* frame = node()->document()->frame();
150     if (!frame)
151         return 0;
152     Page* page = frame->page();
153     if (!page)
154         return 0;
155     return page->chrome();
156 }
157 
updateFromElement()158 void RenderFileUploadControl::updateFromElement()
159 {
160     HTMLInputElement* inputElement = static_cast<HTMLInputElement*>(node());
161     ASSERT(inputElement->isFileUpload());
162 
163     if (!m_button) {
164         m_button = ShadowInputElement::create(inputElement);
165         m_button->setType("button");
166         m_button->setValue(fileButtonChooseFileLabel());
167         RefPtr<RenderStyle> buttonStyle = createButtonStyle(style());
168         RenderObject* renderer = m_button->createRenderer(renderArena(), buttonStyle.get());
169         m_button->setRenderer(renderer);
170         renderer->setStyle(buttonStyle.release());
171         renderer->updateFromElement();
172         m_button->setAttached();
173         m_button->setInDocument();
174 
175         addChild(renderer);
176     }
177 
178     m_button->setDisabled(!theme()->isEnabled(this));
179 
180     // This only supports clearing out the files, but that's OK because for
181     // security reasons that's the only change the DOM is allowed to make.
182     FileList* files = inputElement->files();
183     ASSERT(files);
184     if (files && files->isEmpty() && !m_fileChooser->filenames().isEmpty()) {
185         m_fileChooser->clear();
186         repaint();
187     }
188 }
189 
maxFilenameWidth() const190 int RenderFileUploadControl::maxFilenameWidth() const
191 {
192     return max(0, contentWidth() - m_button->renderBox()->width() - afterButtonSpacing
193         - (m_fileChooser->icon() ? iconWidth + iconFilenameSpacing : 0));
194 }
195 
createButtonStyle(const RenderStyle * parentStyle) const196 PassRefPtr<RenderStyle> RenderFileUploadControl::createButtonStyle(const RenderStyle* parentStyle) const
197 {
198     RefPtr<RenderStyle> style = getCachedPseudoStyle(FILE_UPLOAD_BUTTON);
199     if (!style) {
200         style = RenderStyle::create();
201         if (parentStyle)
202             style->inheritFrom(parentStyle);
203     }
204 
205     // Button text will wrap on file upload controls with widths smaller than the intrinsic button width
206     // without this setWhiteSpace.
207     style->setWhiteSpace(NOWRAP);
208 
209     return style.release();
210 }
211 
paintObject(PaintInfo & paintInfo,int tx,int ty)212 void RenderFileUploadControl::paintObject(PaintInfo& paintInfo, int tx, int ty)
213 {
214     if (style()->visibility() != VISIBLE)
215         return;
216     ASSERT(m_fileChooser);
217 
218     // Push a clip.
219     if (paintInfo.phase == PaintPhaseForeground || paintInfo.phase == PaintPhaseChildBlockBackgrounds) {
220         IntRect clipRect(tx + borderLeft(), ty + borderTop(),
221                          width() - borderLeft() - borderRight(), height() - borderBottom() - borderTop() + buttonShadowHeight);
222         if (clipRect.isEmpty())
223             return;
224         paintInfo.context->save();
225         paintInfo.context->clip(clipRect);
226     }
227 
228     if (paintInfo.phase == PaintPhaseForeground) {
229         const String& displayedFilename = fileTextValue();
230         unsigned length = displayedFilename.length();
231         const UChar* string = displayedFilename.characters();
232         TextRun textRun(string, length, false, 0, 0, TextRun::AllowTrailingExpansion, !style()->isLeftToRightDirection(), style()->unicodeBidi() == Override);
233 
234         // Determine where the filename should be placed
235         int contentLeft = tx + borderLeft() + paddingLeft();
236         int buttonAndIconWidth = m_button->renderBox()->width() + afterButtonSpacing
237             + (m_fileChooser->icon() ? iconWidth + iconFilenameSpacing : 0);
238         int textX;
239         if (style()->isLeftToRightDirection())
240             textX = contentLeft + buttonAndIconWidth;
241         else
242             textX = contentLeft + contentWidth() - buttonAndIconWidth - style()->font().width(textRun);
243         // We want to match the button's baseline
244         RenderButton* buttonRenderer = toRenderButton(m_button->renderer());
245         int textY = buttonRenderer->absoluteBoundingBoxRect().y()
246             + buttonRenderer->marginTop() + buttonRenderer->borderTop() + buttonRenderer->paddingTop()
247             + buttonRenderer->baselinePosition(AlphabeticBaseline, true, HorizontalLine, PositionOnContainingLine);
248 
249         paintInfo.context->setFillColor(style()->visitedDependentColor(CSSPropertyColor), style()->colorSpace());
250 
251         // Draw the filename
252         paintInfo.context->drawBidiText(style()->font(), textRun, IntPoint(textX, textY));
253 
254         if (m_fileChooser->icon()) {
255             // Determine where the icon should be placed
256             int iconY = ty + borderTop() + paddingTop() + (contentHeight() - iconHeight) / 2;
257             int iconX;
258             if (style()->isLeftToRightDirection())
259                 iconX = contentLeft + m_button->renderBox()->width() + afterButtonSpacing;
260             else
261                 iconX = contentLeft + contentWidth() - m_button->renderBox()->width() - afterButtonSpacing - iconWidth;
262 
263             // Draw the file icon
264             m_fileChooser->icon()->paint(paintInfo.context, IntRect(iconX, iconY, iconWidth, iconHeight));
265         }
266     }
267 
268     // Paint the children.
269     RenderBlock::paintObject(paintInfo, tx, ty);
270 
271     // Pop the clip.
272     if (paintInfo.phase == PaintPhaseForeground || paintInfo.phase == PaintPhaseChildBlockBackgrounds)
273         paintInfo.context->restore();
274 }
275 
computePreferredLogicalWidths()276 void RenderFileUploadControl::computePreferredLogicalWidths()
277 {
278     ASSERT(preferredLogicalWidthsDirty());
279 
280     m_minPreferredLogicalWidth = 0;
281     m_maxPreferredLogicalWidth = 0;
282 
283     if (style()->width().isFixed() && style()->width().value() > 0)
284         m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth = computeContentBoxLogicalWidth(style()->width().value());
285     else {
286         // Figure out how big the filename space needs to be for a given number of characters
287         // (using "0" as the nominal character).
288         const UChar ch = '0';
289         float charWidth = style()->font().width(TextRun(&ch, 1, false, 0, 0, TextRun::AllowTrailingExpansion, false));
290         m_maxPreferredLogicalWidth = (int)ceilf(charWidth * defaultWidthNumChars);
291     }
292 
293     if (style()->minWidth().isFixed() && style()->minWidth().value() > 0) {
294         m_maxPreferredLogicalWidth = max(m_maxPreferredLogicalWidth, computeContentBoxLogicalWidth(style()->minWidth().value()));
295         m_minPreferredLogicalWidth = max(m_minPreferredLogicalWidth, computeContentBoxLogicalWidth(style()->minWidth().value()));
296     } else if (style()->width().isPercent() || (style()->width().isAuto() && style()->height().isPercent()))
297         m_minPreferredLogicalWidth = 0;
298     else
299         m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth;
300 
301     if (style()->maxWidth().isFixed() && style()->maxWidth().value() != undefinedLength) {
302         m_maxPreferredLogicalWidth = min(m_maxPreferredLogicalWidth, computeContentBoxLogicalWidth(style()->maxWidth().value()));
303         m_minPreferredLogicalWidth = min(m_minPreferredLogicalWidth, computeContentBoxLogicalWidth(style()->maxWidth().value()));
304     }
305 
306     int toAdd = borderAndPaddingWidth();
307     m_minPreferredLogicalWidth += toAdd;
308     m_maxPreferredLogicalWidth += toAdd;
309 
310     setPreferredLogicalWidthsDirty(false);
311 }
312 
positionForPoint(const IntPoint &)313 VisiblePosition RenderFileUploadControl::positionForPoint(const IntPoint&)
314 {
315     return VisiblePosition();
316 }
317 
receiveDroppedFiles(const Vector<String> & paths)318 void RenderFileUploadControl::receiveDroppedFiles(const Vector<String>& paths)
319 {
320 #if ENABLE(DIRECTORY_UPLOAD)
321     if (allowsDirectoryUpload()) {
322         receiveDropForDirectoryUpload(paths);
323         return;
324     }
325 #endif
326 
327     if (allowsMultipleFiles())
328         m_fileChooser->chooseFiles(paths);
329     else
330         m_fileChooser->chooseFile(paths[0]);
331 }
332 
buttonValue()333 String RenderFileUploadControl::buttonValue()
334 {
335     if (!m_button)
336         return String();
337 
338     return m_button->value();
339 }
340 
fileTextValue() const341 String RenderFileUploadControl::fileTextValue() const
342 {
343     return m_fileChooser->basenameForWidth(style()->font(), maxFilenameWidth());
344 }
345 
346 } // namespace WebCore
347