1 /*
2 * Copyright (C) 2006, 2007, 2012 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 "core/rendering/RenderFileUploadControl.h"
23
24 #include "core/HTMLNames.h"
25 #include "core/dom/shadow/ElementShadow.h"
26 #include "core/dom/shadow/ShadowRoot.h"
27 #include "core/fileapi/FileList.h"
28 #include "core/html/HTMLInputElement.h"
29 #include "core/rendering/PaintInfo.h"
30 #include "core/rendering/RenderButton.h"
31 #include "core/rendering/RenderTheme.h"
32 #include "platform/fonts/Font.h"
33 #include "platform/graphics/GraphicsContextStateSaver.h"
34 #include "platform/text/PlatformLocale.h"
35 #include "platform/text/TextRun.h"
36 #include <math.h>
37
38 using namespace std;
39
40 namespace WebCore {
41
42 using namespace HTMLNames;
43
44 const int afterButtonSpacing = 4;
45 const int defaultWidthNumChars = 34;
46 const int buttonShadowHeight = 2;
47
RenderFileUploadControl(HTMLInputElement * input)48 RenderFileUploadControl::RenderFileUploadControl(HTMLInputElement* input)
49 : RenderBlockFlow(input)
50 , m_canReceiveDroppedFiles(input->canReceiveDroppedFiles())
51 {
52 }
53
~RenderFileUploadControl()54 RenderFileUploadControl::~RenderFileUploadControl()
55 {
56 }
57
updateFromElement()58 void RenderFileUploadControl::updateFromElement()
59 {
60 HTMLInputElement* input = toHTMLInputElement(node());
61 ASSERT(input->isFileUpload());
62
63 if (HTMLInputElement* button = uploadButton()) {
64 bool newCanReceiveDroppedFilesState = input->canReceiveDroppedFiles();
65 if (m_canReceiveDroppedFiles != newCanReceiveDroppedFilesState) {
66 m_canReceiveDroppedFiles = newCanReceiveDroppedFilesState;
67 button->setActive(newCanReceiveDroppedFilesState);
68 }
69 }
70
71 // This only supports clearing out the files, but that's OK because for
72 // security reasons that's the only change the DOM is allowed to make.
73 FileList* files = input->files();
74 ASSERT(files);
75 if (files && files->isEmpty())
76 paintInvalidationForWholeRenderer();
77 }
78
nodeWidth(Node * node)79 static int nodeWidth(Node* node)
80 {
81 return (node && node->renderBox()) ? node->renderBox()->pixelSnappedWidth() : 0;
82 }
83
maxFilenameWidth() const84 int RenderFileUploadControl::maxFilenameWidth() const
85 {
86 return max(0, contentBoxRect().pixelSnappedWidth() - nodeWidth(uploadButton()) - afterButtonSpacing);
87 }
88
paintObject(PaintInfo & paintInfo,const LayoutPoint & paintOffset)89 void RenderFileUploadControl::paintObject(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
90 {
91 if (style()->visibility() != VISIBLE)
92 return;
93
94 // Push a clip.
95 GraphicsContextStateSaver stateSaver(*paintInfo.context, false);
96 if (paintInfo.phase == PaintPhaseForeground || paintInfo.phase == PaintPhaseChildBlockBackgrounds) {
97 IntRect clipRect = enclosingIntRect(LayoutRect(paintOffset.x() + borderLeft(), paintOffset.y() + borderTop(),
98 width() - borderLeft() - borderRight(), height() - borderBottom() - borderTop() + buttonShadowHeight));
99 if (clipRect.isEmpty())
100 return;
101 stateSaver.save();
102 paintInfo.context->clip(clipRect);
103 }
104
105 if (paintInfo.phase == PaintPhaseForeground) {
106 const String& displayedFilename = fileTextValue();
107 const Font& font = style()->font();
108 TextRun textRun = constructTextRun(this, font, displayedFilename, style(), TextRun::AllowTrailingExpansion, RespectDirection | RespectDirectionOverride);
109 textRun.disableRoundingHacks();
110
111 // Determine where the filename should be placed
112 LayoutUnit contentLeft = paintOffset.x() + borderLeft() + paddingLeft();
113 HTMLInputElement* button = uploadButton();
114 if (!button)
115 return;
116
117 LayoutUnit buttonWidth = nodeWidth(button);
118 LayoutUnit buttonAndSpacingWidth = buttonWidth + afterButtonSpacing;
119 float textWidth = font.width(textRun);
120 LayoutUnit textX;
121 if (style()->isLeftToRightDirection())
122 textX = contentLeft + buttonAndSpacingWidth;
123 else
124 textX = contentLeft + contentWidth() - buttonAndSpacingWidth - textWidth;
125
126 LayoutUnit textY = 0;
127 // We want to match the button's baseline
128 // FIXME: Make this work with transforms.
129 if (RenderButton* buttonRenderer = toRenderButton(button->renderer()))
130 textY = paintOffset.y() + borderTop() + paddingTop() + buttonRenderer->baselinePosition(AlphabeticBaseline, true, HorizontalLine, PositionOnContainingLine);
131 else
132 textY = baselinePosition(AlphabeticBaseline, true, HorizontalLine, PositionOnContainingLine);
133 TextRunPaintInfo textRunPaintInfo(textRun);
134 // FIXME: Shouldn't these offsets be rounded? crbug.com/350474
135 textRunPaintInfo.bounds = FloatRect(textX.toFloat(), textY.toFloat() - style()->fontMetrics().ascent(),
136 textWidth, style()->fontMetrics().height());
137
138 paintInfo.context->setFillColor(resolveColor(CSSPropertyColor));
139
140 // Draw the filename
141 paintInfo.context->drawBidiText(font, textRunPaintInfo, IntPoint(roundToInt(textX), roundToInt(textY)));
142 }
143
144 // Paint the children.
145 RenderBlockFlow::paintObject(paintInfo, paintOffset);
146 }
147
computeIntrinsicLogicalWidths(LayoutUnit & minLogicalWidth,LayoutUnit & maxLogicalWidth) const148 void RenderFileUploadControl::computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const
149 {
150 // Figure out how big the filename space needs to be for a given number of characters
151 // (using "0" as the nominal character).
152 const UChar character = '0';
153 const String characterAsString = String(&character, 1);
154 const Font& font = style()->font();
155 // FIXME: Remove the need for this const_cast by making constructTextRun take a const RenderObject*.
156 RenderFileUploadControl* renderer = const_cast<RenderFileUploadControl*>(this);
157 float minDefaultLabelWidth = defaultWidthNumChars * font.width(constructTextRun(renderer, font, characterAsString, style(), TextRun::AllowTrailingExpansion));
158
159 const String label = toHTMLInputElement(node())->locale().queryString(blink::WebLocalizedString::FileButtonNoFileSelectedLabel);
160 float defaultLabelWidth = font.width(constructTextRun(renderer, font, label, style(), TextRun::AllowTrailingExpansion));
161 if (HTMLInputElement* button = uploadButton())
162 if (RenderObject* buttonRenderer = button->renderer())
163 defaultLabelWidth += buttonRenderer->maxPreferredLogicalWidth() + afterButtonSpacing;
164 maxLogicalWidth = static_cast<int>(ceilf(max(minDefaultLabelWidth, defaultLabelWidth)));
165
166 if (!style()->width().isPercent())
167 minLogicalWidth = maxLogicalWidth;
168 }
169
computePreferredLogicalWidths()170 void RenderFileUploadControl::computePreferredLogicalWidths()
171 {
172 ASSERT(preferredLogicalWidthsDirty());
173
174 m_minPreferredLogicalWidth = 0;
175 m_maxPreferredLogicalWidth = 0;
176 RenderStyle* styleToUse = style();
177
178 if (styleToUse->width().isFixed() && styleToUse->width().value() > 0)
179 m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth = adjustContentBoxLogicalWidthForBoxSizing(styleToUse->width().value());
180 else
181 computeIntrinsicLogicalWidths(m_minPreferredLogicalWidth, m_maxPreferredLogicalWidth);
182
183 if (styleToUse->minWidth().isFixed() && styleToUse->minWidth().value() > 0) {
184 m_maxPreferredLogicalWidth = max(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->minWidth().value()));
185 m_minPreferredLogicalWidth = max(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->minWidth().value()));
186 }
187
188 if (styleToUse->maxWidth().isFixed()) {
189 m_maxPreferredLogicalWidth = min(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->maxWidth().value()));
190 m_minPreferredLogicalWidth = min(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->maxWidth().value()));
191 }
192
193 int toAdd = borderAndPaddingWidth();
194 m_minPreferredLogicalWidth += toAdd;
195 m_maxPreferredLogicalWidth += toAdd;
196
197 clearPreferredLogicalWidthsDirty();
198 }
199
positionForPoint(const LayoutPoint &)200 PositionWithAffinity RenderFileUploadControl::positionForPoint(const LayoutPoint&)
201 {
202 return PositionWithAffinity();
203 }
204
uploadButton() const205 HTMLInputElement* RenderFileUploadControl::uploadButton() const
206 {
207 // FIXME: This should be on HTMLInputElement as an API like innerButtonElement().
208 HTMLInputElement* input = toHTMLInputElement(node());
209 Node* buttonNode = input->userAgentShadowRoot()->firstChild();
210 return isHTMLInputElement(buttonNode) ? toHTMLInputElement(buttonNode) : 0;
211 }
212
buttonValue()213 String RenderFileUploadControl::buttonValue()
214 {
215 if (HTMLInputElement* button = uploadButton())
216 return button->value();
217
218 return String();
219 }
220
fileTextValue() const221 String RenderFileUploadControl::fileTextValue() const
222 {
223 HTMLInputElement* input = toHTMLInputElement(node());
224 ASSERT(input->files());
225 return RenderTheme::theme().fileListNameForWidth(input->locale(), input->files(), style()->font(), maxFilenameWidth());
226 }
227
228 } // namespace WebCore
229