1 /**
2 * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
3 * (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Library General Public License
16 * along with this library; see the file COPYING.LIB. If not, write to
17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
19 *
20 */
21
22 #include "config.h"
23 #include "core/rendering/RenderTextControl.h"
24
25 #include "core/html/HTMLTextFormControlElement.h"
26 #include "core/rendering/HitTestResult.h"
27 #include "core/rendering/RenderTheme.h"
28 #include "platform/scroll/ScrollbarTheme.h"
29 #include "wtf/unicode/CharacterNames.h"
30
31 using namespace std;
32
33 namespace WebCore {
34
RenderTextControl(HTMLTextFormControlElement * element)35 RenderTextControl::RenderTextControl(HTMLTextFormControlElement* element)
36 : RenderBlockFlow(element)
37 {
38 ASSERT(element);
39 }
40
~RenderTextControl()41 RenderTextControl::~RenderTextControl()
42 {
43 }
44
textFormControlElement() const45 HTMLTextFormControlElement* RenderTextControl::textFormControlElement() const
46 {
47 return toHTMLTextFormControlElement(node());
48 }
49
innerTextElement() const50 HTMLElement* RenderTextControl::innerTextElement() const
51 {
52 return textFormControlElement()->innerTextElement();
53 }
54
addChild(RenderObject * newChild,RenderObject * beforeChild)55 void RenderTextControl::addChild(RenderObject* newChild, RenderObject* beforeChild)
56 {
57 // FIXME: This is a terrible hack to get the caret over the placeholder text since it'll
58 // make us paint the placeholder first. (See https://trac.webkit.org/changeset/118733)
59 Node* node = newChild->node();
60 if (node && node->isElementNode() && toElement(node)->pseudo() == "-webkit-input-placeholder")
61 RenderBlock::addChild(newChild, firstChild());
62 else
63 RenderBlock::addChild(newChild, beforeChild);
64 }
65
styleDidChange(StyleDifference diff,const RenderStyle * oldStyle)66 void RenderTextControl::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
67 {
68 RenderBlock::styleDidChange(diff, oldStyle);
69 Element* innerText = innerTextElement();
70 if (!innerText)
71 return;
72 RenderBlock* innerTextRenderer = toRenderBlock(innerText->renderer());
73 if (innerTextRenderer) {
74 // We may have set the width and the height in the old style in layout().
75 // Reset them now to avoid getting a spurious layout hint.
76 innerTextRenderer->style()->setHeight(Length());
77 innerTextRenderer->style()->setWidth(Length());
78 innerTextRenderer->setStyle(createInnerTextStyle(style()));
79 innerText->setNeedsStyleRecalc();
80 }
81 textFormControlElement()->updatePlaceholderVisibility(false);
82 }
83
updateUserModifyProperty(HTMLTextFormControlElement * node,RenderStyle * style)84 static inline void updateUserModifyProperty(HTMLTextFormControlElement* node, RenderStyle* style)
85 {
86 style->setUserModify(node->isDisabledOrReadOnly() ? READ_ONLY : READ_WRITE_PLAINTEXT_ONLY);
87 }
88
adjustInnerTextStyle(RenderStyle * textBlockStyle) const89 void RenderTextControl::adjustInnerTextStyle(RenderStyle* textBlockStyle) const
90 {
91 // The inner block, if present, always has its direction set to LTR,
92 // so we need to inherit the direction and unicode-bidi style from the element.
93 textBlockStyle->setDirection(style()->direction());
94 textBlockStyle->setUnicodeBidi(style()->unicodeBidi());
95
96 updateUserModifyProperty(textFormControlElement(), textBlockStyle);
97 }
98
textBlockLogicalHeight() const99 int RenderTextControl::textBlockLogicalHeight() const
100 {
101 return logicalHeight() - borderAndPaddingLogicalHeight();
102 }
103
textBlockLogicalWidth() const104 int RenderTextControl::textBlockLogicalWidth() const
105 {
106 Element* innerText = innerTextElement();
107 ASSERT(innerText);
108
109 LayoutUnit unitWidth = logicalWidth() - borderAndPaddingLogicalWidth();
110 if (innerText->renderer())
111 unitWidth -= innerText->renderBox()->paddingStart() + innerText->renderBox()->paddingEnd();
112
113 return unitWidth;
114 }
115
updateFromElement()116 void RenderTextControl::updateFromElement()
117 {
118 Element* innerText = innerTextElement();
119 if (innerText && innerText->renderer())
120 updateUserModifyProperty(textFormControlElement(), innerText->renderer()->style());
121 }
122
scrollbarThickness() const123 int RenderTextControl::scrollbarThickness() const
124 {
125 // FIXME: We should get the size of the scrollbar from the RenderTheme instead.
126 return ScrollbarTheme::theme()->scrollbarThickness();
127 }
128
computeLogicalHeight(LayoutUnit logicalHeight,LayoutUnit logicalTop,LogicalExtentComputedValues & computedValues) const129 void RenderTextControl::computeLogicalHeight(LayoutUnit logicalHeight, LayoutUnit logicalTop, LogicalExtentComputedValues& computedValues) const
130 {
131 HTMLElement* innerText = innerTextElement();
132 ASSERT(innerText);
133 if (RenderBox* innerTextBox = innerText->renderBox()) {
134 LayoutUnit nonContentHeight = innerTextBox->borderAndPaddingHeight() + innerTextBox->marginHeight();
135 logicalHeight = computeControlLogicalHeight(innerTextBox->lineHeight(true, HorizontalLine, PositionOfInteriorLineBoxes), nonContentHeight) + borderAndPaddingHeight();
136
137 // We are able to have a horizontal scrollbar if the overflow style is scroll, or if its auto and there's no word wrap.
138 if ((isHorizontalWritingMode() && (style()->overflowX() == OSCROLL || (style()->overflowX() == OAUTO && innerText->renderer()->style()->overflowWrap() == NormalOverflowWrap)))
139 || (!isHorizontalWritingMode() && (style()->overflowY() == OSCROLL || (style()->overflowY() == OAUTO && innerText->renderer()->style()->overflowWrap() == NormalOverflowWrap))))
140 logicalHeight += scrollbarThickness();
141 }
142
143 RenderBox::computeLogicalHeight(logicalHeight, logicalTop, computedValues);
144 }
145
hitInnerTextElement(HitTestResult & result,const LayoutPoint & pointInContainer,const LayoutPoint & accumulatedOffset)146 void RenderTextControl::hitInnerTextElement(HitTestResult& result, const LayoutPoint& pointInContainer, const LayoutPoint& accumulatedOffset)
147 {
148 HTMLElement* innerText = innerTextElement();
149 if (!innerText->renderer())
150 return;
151
152 LayoutPoint adjustedLocation = accumulatedOffset + location();
153 LayoutPoint localPoint = pointInContainer - toLayoutSize(adjustedLocation + innerText->renderBox()->location());
154 if (hasOverflowClip())
155 localPoint += scrolledContentOffset();
156 result.setInnerNode(innerText);
157 result.setInnerNonSharedNode(innerText);
158 result.setLocalPoint(localPoint);
159 }
160
161 static const char* const fontFamiliesWithInvalidCharWidth[] = {
162 "American Typewriter",
163 "Arial Hebrew",
164 "Chalkboard",
165 "Cochin",
166 "Corsiva Hebrew",
167 "Courier",
168 "Euphemia UCAS",
169 "Geneva",
170 "Gill Sans",
171 "Hei",
172 "Helvetica",
173 "Hoefler Text",
174 "InaiMathi",
175 "Kai",
176 "Lucida Grande",
177 "Marker Felt",
178 "Monaco",
179 "Mshtakan",
180 "New Peninim MT",
181 "Osaka",
182 "Raanana",
183 "STHeiti",
184 "Symbol",
185 "Times",
186 "Apple Braille",
187 "Apple LiGothic",
188 "Apple LiSung",
189 "Apple Symbols",
190 "AppleGothic",
191 "AppleMyungjo",
192 "#GungSeo",
193 "#HeadLineA",
194 "#PCMyungjo",
195 "#PilGi",
196 };
197
198 // For font families where any of the fonts don't have a valid entry in the OS/2 table
199 // for avgCharWidth, fallback to the legacy webkit behavior of getting the avgCharWidth
200 // from the width of a '0'. This only seems to apply to a fixed number of Mac fonts,
201 // but, in order to get similar rendering across platforms, we do this check for
202 // all platforms.
hasValidAvgCharWidth(AtomicString family)203 bool RenderTextControl::hasValidAvgCharWidth(AtomicString family)
204 {
205 static HashSet<AtomicString>* fontFamiliesWithInvalidCharWidthMap = 0;
206
207 if (family.isEmpty())
208 return false;
209
210 if (!fontFamiliesWithInvalidCharWidthMap) {
211 fontFamiliesWithInvalidCharWidthMap = new HashSet<AtomicString>;
212
213 for (size_t i = 0; i < WTF_ARRAY_LENGTH(fontFamiliesWithInvalidCharWidth); ++i)
214 fontFamiliesWithInvalidCharWidthMap->add(AtomicString(fontFamiliesWithInvalidCharWidth[i]));
215 }
216
217 return !fontFamiliesWithInvalidCharWidthMap->contains(family);
218 }
219
getAvgCharWidth(AtomicString family)220 float RenderTextControl::getAvgCharWidth(AtomicString family)
221 {
222 if (hasValidAvgCharWidth(family))
223 return roundf(style()->font().primaryFont()->avgCharWidth());
224
225 const UChar ch = '0';
226 const String str = String(&ch, 1);
227 const Font& font = style()->font();
228 TextRun textRun = constructTextRun(this, font, str, style(), TextRun::AllowTrailingExpansion);
229 textRun.disableRoundingHacks();
230 return font.width(textRun);
231 }
232
scaleEmToUnits(int x) const233 float RenderTextControl::scaleEmToUnits(int x) const
234 {
235 // This matches the unitsPerEm value for MS Shell Dlg and Courier New from the "head" font table.
236 float unitsPerEm = 2048.0f;
237 return roundf(style()->font().size() * x / unitsPerEm);
238 }
239
computeIntrinsicLogicalWidths(LayoutUnit & minLogicalWidth,LayoutUnit & maxLogicalWidth) const240 void RenderTextControl::computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const
241 {
242 // Use average character width. Matches IE.
243 AtomicString family = style()->font().family().family();
244 maxLogicalWidth = preferredContentLogicalWidth(const_cast<RenderTextControl*>(this)->getAvgCharWidth(family));
245 if (RenderBox* innerTextRenderBox = innerTextElement()->renderBox())
246 maxLogicalWidth += innerTextRenderBox->paddingStart() + innerTextRenderBox->paddingEnd();
247 if (!style()->logicalWidth().isPercent())
248 minLogicalWidth = maxLogicalWidth;
249 }
250
computePreferredLogicalWidths()251 void RenderTextControl::computePreferredLogicalWidths()
252 {
253 ASSERT(preferredLogicalWidthsDirty());
254
255 m_minPreferredLogicalWidth = 0;
256 m_maxPreferredLogicalWidth = 0;
257
258 if (style()->logicalWidth().isFixed() && style()->logicalWidth().value() >= 0)
259 m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth = adjustContentBoxLogicalWidthForBoxSizing(style()->logicalWidth().value());
260 else
261 computeIntrinsicLogicalWidths(m_minPreferredLogicalWidth, m_maxPreferredLogicalWidth);
262
263 if (style()->logicalMinWidth().isFixed() && style()->logicalMinWidth().value() > 0) {
264 m_maxPreferredLogicalWidth = max(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(style()->logicalMinWidth().value()));
265 m_minPreferredLogicalWidth = max(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(style()->logicalMinWidth().value()));
266 }
267
268 if (style()->logicalMaxWidth().isFixed()) {
269 m_maxPreferredLogicalWidth = min(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(style()->logicalMaxWidth().value()));
270 m_minPreferredLogicalWidth = min(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(style()->logicalMaxWidth().value()));
271 }
272
273 LayoutUnit toAdd = borderAndPaddingLogicalWidth();
274
275 m_minPreferredLogicalWidth += toAdd;
276 m_maxPreferredLogicalWidth += toAdd;
277
278 clearPreferredLogicalWidthsDirty();
279 }
280
addFocusRingRects(Vector<IntRect> & rects,const LayoutPoint & additionalOffset,const RenderLayerModelObject *)281 void RenderTextControl::addFocusRingRects(Vector<IntRect>& rects, const LayoutPoint& additionalOffset, const RenderLayerModelObject*)
282 {
283 if (!size().isEmpty())
284 rects.append(pixelSnappedIntRect(additionalOffset, size()));
285 }
286
layoutSpecialExcludedChild(bool relayoutChildren,SubtreeLayoutScope & layoutScope)287 RenderObject* RenderTextControl::layoutSpecialExcludedChild(bool relayoutChildren, SubtreeLayoutScope& layoutScope)
288 {
289 HTMLElement* placeholder = toHTMLTextFormControlElement(node())->placeholderElement();
290 RenderObject* placeholderRenderer = placeholder ? placeholder->renderer() : 0;
291 if (!placeholderRenderer)
292 return 0;
293 if (relayoutChildren)
294 layoutScope.setChildNeedsLayout(placeholderRenderer);
295 return placeholderRenderer;
296 }
297
298 } // namespace WebCore
299