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 "RenderButton.h"

    36 #include "RenderText.h"

    37 #include "RenderTheme.h"

    38 #include "RenderView.h"

    39 #include <math.h>

    40 

    41 using namespace std;

    42 

    43 namespace WebCore {

    44 

    45 using namespace HTMLNames;

    46 

    47 const int afterButtonSpacing = 4;

    48 const int iconHeight = 16;

    49 const int iconWidth = 16;

    50 const int iconFilenameSpacing = 2;

    51 const int defaultWidthNumChars = 34;

    52 const int buttonShadowHeight = 2;

    53 

    54 RenderFileUploadControl::RenderFileUploadControl(HTMLInputElement* input)

    55     : RenderBlock(input)

    56 {

    57     FileList* list = input->files();

    58     Vector<String> filenames;

    59     unsigned length = list ? list->length() : 0;

    60     for (unsigned i = 0; i < length; ++i)

    61         filenames.append(list->item(i)->path());

    62     m_fileChooser = FileChooser::create(this, filenames);

    63 }

    64 

    65 RenderFileUploadControl::~RenderFileUploadControl()

    66 {

    67     if (m_button)

    68         m_button->detach();

    69     m_fileChooser->disconnectClient();

    70 }

    71 

    72 void RenderFileUploadControl::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)

    73 {

    74     RenderBlock::styleDidChange(diff, oldStyle);

    75     if (m_button)

    76         m_button->renderer()->setStyle(createButtonStyle(style()));

    77 

    78     setReplaced(isInline());

    79 }

    80 

    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 

    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->getAttribute(multipleAttr).isNull();

   104 }

   105 

   106 #if ENABLE(DIRECTORY_UPLOAD)

   107 bool RenderFileUploadControl::allowsDirectoryUpload()

   108 {

   109     HTMLInputElement* input = static_cast<HTMLInputElement*>(node());

   110     return !input->getAttribute(webkitdirectoryAttr).isNull();

   111 }

   112 #endif

   113 

   114 String RenderFileUploadControl::acceptTypes()

   115 {

   116     return static_cast<HTMLInputElement*>(node())->accept();

   117 }

   118 

   119 void RenderFileUploadControl::chooseIconForFiles(FileChooser* chooser, const Vector<String>& filenames)

   120 {

   121     if (Chrome* chromePointer = chrome())

   122         chromePointer->chooseIconForFiles(filenames, chooser);

   123 }

   124 

   125 void RenderFileUploadControl::click()

   126 {

   127     if (Chrome* chromePointer = chrome())

   128         chromePointer->runOpenPanel(node()->document()->frame(), m_fileChooser);

   129 }

   130 

   131 Chrome* RenderFileUploadControl::chrome() const

   132 {

   133     Frame* frame = node()->document()->frame();

   134     if (!frame)

   135         return 0;

   136     Page* page = frame->page();

   137     if (!page)

   138         return 0;

   139     return page->chrome();

   140 }

   141 

   142 void RenderFileUploadControl::updateFromElement()

   143 {

   144     HTMLInputElement* inputElement = static_cast<HTMLInputElement*>(node());

   145     ASSERT(inputElement->inputType() == HTMLInputElement::FILE);

   146     

   147     if (!m_button) {

   148         m_button = ShadowInputElement::create(inputElement);

   149         m_button->setInputType("button");

   150         m_button->setValue(fileButtonChooseFileLabel());

   151         RefPtr<RenderStyle> buttonStyle = createButtonStyle(style());

   152         RenderObject* renderer = m_button->createRenderer(renderArena(), buttonStyle.get());

   153         m_button->setRenderer(renderer);

   154         renderer->setStyle(buttonStyle.release());

   155         renderer->updateFromElement();

   156         m_button->setAttached();

   157         m_button->setInDocument();

   158 

   159         addChild(renderer);

   160     }

   161 

   162     m_button->setDisabled(!theme()->isEnabled(this));

   163 

   164     // This only supports clearing out the files, but that's OK because for

   165     // security reasons that's the only change the DOM is allowed to make.

   166     FileList* files = inputElement->files();

   167     ASSERT(files);

   168     if (files && files->isEmpty() && !m_fileChooser->filenames().isEmpty()) {

   169         m_fileChooser->clear();

   170         repaint();

   171     }

   172 }

   173 

   174 int RenderFileUploadControl::maxFilenameWidth() const

   175 {

   176     return max(0, contentWidth() - m_button->renderBox()->width() - afterButtonSpacing

   177         - (m_fileChooser->icon() ? iconWidth + iconFilenameSpacing : 0));

   178 }

   179 

   180 PassRefPtr<RenderStyle> RenderFileUploadControl::createButtonStyle(const RenderStyle* parentStyle) const

   181 {

   182     RefPtr<RenderStyle> style = getCachedPseudoStyle(FILE_UPLOAD_BUTTON);

   183     if (!style) {

   184         style = RenderStyle::create();

   185         if (parentStyle)

   186             style->inheritFrom(parentStyle);

   187     }

   188 

   189     // Button text will wrap on file upload controls with widths smaller than the intrinsic button width

   190     // without this setWhiteSpace.

   191     style->setWhiteSpace(NOWRAP);

   192 

   193     return style.release();

   194 }

   195 

   196 void RenderFileUploadControl::paintObject(PaintInfo& paintInfo, int tx, int ty)

   197 {

   198     if (style()->visibility() != VISIBLE)

   199         return;

   200     ASSERT(m_fileChooser);

   201     

   202     // Push a clip.

   203     if (paintInfo.phase == PaintPhaseForeground || paintInfo.phase == PaintPhaseChildBlockBackgrounds) {

   204         IntRect clipRect(tx + borderLeft(), ty + borderTop(),

   205                          width() - borderLeft() - borderRight(), height() - borderBottom() - borderTop() + buttonShadowHeight);

   206         if (clipRect.isEmpty())

   207             return;

   208         paintInfo.context->save();

   209         paintInfo.context->clip(clipRect);

   210     }

   211 

   212     if (paintInfo.phase == PaintPhaseForeground) {

   213         const String& displayedFilename = fileTextValue();

   214         unsigned length = displayedFilename.length();

   215         const UChar* string = displayedFilename.characters();

   216         TextRun textRun(string, length, false, 0, 0, style()->direction() == RTL, style()->unicodeBidi() == Override);

   217         

   218         // Determine where the filename should be placed

   219         int contentLeft = tx + borderLeft() + paddingLeft();

   220         int buttonAndIconWidth = m_button->renderBox()->width() + afterButtonSpacing

   221             + (m_fileChooser->icon() ? iconWidth + iconFilenameSpacing : 0);

   222         int textX;

   223         if (style()->direction() == LTR)

   224             textX = contentLeft + buttonAndIconWidth;

   225         else

   226             textX = contentLeft + contentWidth() - buttonAndIconWidth - style()->font().width(textRun);

   227         // We want to match the button's baseline

   228         RenderButton* buttonRenderer = toRenderButton(m_button->renderer());

   229         int textY = buttonRenderer->absoluteBoundingBoxRect().y()

   230             + buttonRenderer->marginTop() + buttonRenderer->borderTop() + buttonRenderer->paddingTop()

   231             + buttonRenderer->baselinePosition(true, false);

   232 

   233         paintInfo.context->setFillColor(style()->visitedDependentColor(CSSPropertyColor), style()->colorSpace());

   234         

   235         // Draw the filename

   236         paintInfo.context->drawBidiText(style()->font(), textRun, IntPoint(textX, textY));

   237         

   238         if (m_fileChooser->icon()) {

   239             // Determine where the icon should be placed

   240             int iconY = ty + borderTop() + paddingTop() + (contentHeight() - iconHeight) / 2;

   241             int iconX;

   242             if (style()->direction() == LTR)

   243                 iconX = contentLeft + m_button->renderBox()->width() + afterButtonSpacing;

   244             else

   245                 iconX = contentLeft + contentWidth() - m_button->renderBox()->width() - afterButtonSpacing - iconWidth;

   246 

   247             // Draw the file icon

   248             m_fileChooser->icon()->paint(paintInfo.context, IntRect(iconX, iconY, iconWidth, iconHeight));

   249         }

   250     }

   251 

   252     // Paint the children.

   253     RenderBlock::paintObject(paintInfo, tx, ty);

   254 

   255     // Pop the clip.

   256     if (paintInfo.phase == PaintPhaseForeground || paintInfo.phase == PaintPhaseChildBlockBackgrounds)

   257         paintInfo.context->restore();

   258 }

   259 

   260 void RenderFileUploadControl::calcPrefWidths()

   261 {

   262     ASSERT(prefWidthsDirty());

   263 

   264     m_minPrefWidth = 0;

   265     m_maxPrefWidth = 0;

   266 

   267     if (style()->width().isFixed() && style()->width().value() > 0)

   268         m_minPrefWidth = m_maxPrefWidth = calcContentBoxWidth(style()->width().value());

   269     else {

   270         // Figure out how big the filename space needs to be for a given number of characters

   271         // (using "0" as the nominal character).

   272         const UChar ch = '0';

   273         float charWidth = style()->font().floatWidth(TextRun(&ch, 1, false, 0, 0, false, false, false));

   274         m_maxPrefWidth = (int)ceilf(charWidth * defaultWidthNumChars);

   275     }

   276 

   277     if (style()->minWidth().isFixed() && style()->minWidth().value() > 0) {

   278         m_maxPrefWidth = max(m_maxPrefWidth, calcContentBoxWidth(style()->minWidth().value()));

   279         m_minPrefWidth = max(m_minPrefWidth, calcContentBoxWidth(style()->minWidth().value()));

   280     } else if (style()->width().isPercent() || (style()->width().isAuto() && style()->height().isPercent()))

   281         m_minPrefWidth = 0;

   282     else

   283         m_minPrefWidth = m_maxPrefWidth;

   284 

   285     if (style()->maxWidth().isFixed() && style()->maxWidth().value() != undefinedLength) {

   286         m_maxPrefWidth = min(m_maxPrefWidth, calcContentBoxWidth(style()->maxWidth().value()));

   287         m_minPrefWidth = min(m_minPrefWidth, calcContentBoxWidth(style()->maxWidth().value()));

   288     }

   289 

   290     int toAdd = borderAndPaddingWidth();

   291     m_minPrefWidth += toAdd;

   292     m_maxPrefWidth += toAdd;

   293 

   294     setPrefWidthsDirty(false);

   295 }

   296 

   297 void RenderFileUploadControl::receiveDroppedFiles(const Vector<String>& paths)

   298 {

   299     if (allowsMultipleFiles())

   300         m_fileChooser->chooseFiles(paths);

   301     else

   302         m_fileChooser->chooseFile(paths[0]);

   303 }

   304 

   305 String RenderFileUploadControl::buttonValue()

   306 {

   307     if (!m_button)

   308         return String();

   309     

   310     return m_button->value();

   311 }

   312 

   313 String RenderFileUploadControl::fileTextValue() const

   314 {

   315     return m_fileChooser->basenameForWidth(style()->font(), maxFilenameWidth());

   316 }

   317     

   318 } // namespace WebCore