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 "core/rendering/TextRunConstructor.h"
29 #include "platform/scroll/ScrollbarTheme.h"
30 #include "wtf/unicode/CharacterNames.h"
31
32 namespace blink {
33
RenderTextControl(HTMLTextFormControlElement * element)34 RenderTextControl::RenderTextControl(HTMLTextFormControlElement* element)
35 : RenderBlockFlow(element)
36 {
37 ASSERT(element);
38 }
39
~RenderTextControl()40 RenderTextControl::~RenderTextControl()
41 {
42 }
43
textFormControlElement() const44 HTMLTextFormControlElement* RenderTextControl::textFormControlElement() const
45 {
46 return toHTMLTextFormControlElement(node());
47 }
48
innerEditorElement() const49 HTMLElement* RenderTextControl::innerEditorElement() const
50 {
51 return textFormControlElement()->innerEditorElement();
52 }
53
addChild(RenderObject * newChild,RenderObject * beforeChild)54 void RenderTextControl::addChild(RenderObject* newChild, RenderObject* beforeChild)
55 {
56 // FIXME: This is a terrible hack to get the caret over the placeholder text since it'll
57 // make us paint the placeholder first. (See https://trac.webkit.org/changeset/118733)
58 Node* node = newChild->node();
59 if (node && node->isElementNode() && toElement(node)->shadowPseudoId() == "-webkit-input-placeholder")
60 RenderBlockFlow::addChild(newChild, firstChild());
61 else
62 RenderBlockFlow::addChild(newChild, beforeChild);
63 }
64
styleDidChange(StyleDifference diff,const RenderStyle * oldStyle)65 void RenderTextControl::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
66 {
67 RenderBlockFlow::styleDidChange(diff, oldStyle);
68 Element* innerEditor = innerEditorElement();
69 if (!innerEditor)
70 return;
71 RenderBlock* innerEditorRenderer = toRenderBlock(innerEditor->renderer());
72 if (innerEditorRenderer) {
73 // We may have set the width and the height in the old style in layout().
74 // Reset them now to avoid getting a spurious layout hint.
75 innerEditorRenderer->style()->setHeight(Length());
76 innerEditorRenderer->style()->setWidth(Length());
77 innerEditorRenderer->setStyle(createInnerEditorStyle(style()));
78 innerEditor->setNeedsStyleRecalc(SubtreeStyleChange);
79 }
80 textFormControlElement()->updatePlaceholderVisibility(false);
81 }
82
updateUserModifyProperty(HTMLTextFormControlElement * node,RenderStyle * style)83 static inline void updateUserModifyProperty(HTMLTextFormControlElement* node, RenderStyle* style)
84 {
85 style->setUserModify(node->isDisabledOrReadOnly() ? READ_ONLY : READ_WRITE_PLAINTEXT_ONLY);
86 }
87
adjustInnerEditorStyle(RenderStyle * textBlockStyle) const88 void RenderTextControl::adjustInnerEditorStyle(RenderStyle* textBlockStyle) const
89 {
90 // The inner block, if present, always has its direction set to LTR,
91 // so we need to inherit the direction and unicode-bidi style from the element.
92 textBlockStyle->setDirection(style()->direction());
93 textBlockStyle->setUnicodeBidi(style()->unicodeBidi());
94
95 updateUserModifyProperty(textFormControlElement(), textBlockStyle);
96 }
97
textBlockLogicalHeight() const98 int RenderTextControl::textBlockLogicalHeight() const
99 {
100 return logicalHeight() - borderAndPaddingLogicalHeight();
101 }
102
textBlockLogicalWidth() const103 int RenderTextControl::textBlockLogicalWidth() const
104 {
105 Element* innerEditor = innerEditorElement();
106 ASSERT(innerEditor);
107
108 LayoutUnit unitWidth = logicalWidth() - borderAndPaddingLogicalWidth();
109 if (innerEditor->renderer())
110 unitWidth -= innerEditor->renderBox()->paddingStart() + innerEditor->renderBox()->paddingEnd();
111
112 return unitWidth;
113 }
114
updateFromElement()115 void RenderTextControl::updateFromElement()
116 {
117 Element* innerEditor = innerEditorElement();
118 if (innerEditor && innerEditor->renderer())
119 updateUserModifyProperty(textFormControlElement(), innerEditor->renderer()->style());
120 }
121
scrollbarThickness() const122 int RenderTextControl::scrollbarThickness() const
123 {
124 // FIXME: We should get the size of the scrollbar from the RenderTheme instead.
125 return ScrollbarTheme::theme()->scrollbarThickness();
126 }
127
computeLogicalHeight(LayoutUnit logicalHeight,LayoutUnit logicalTop,LogicalExtentComputedValues & computedValues) const128 void RenderTextControl::computeLogicalHeight(LayoutUnit logicalHeight, LayoutUnit logicalTop, LogicalExtentComputedValues& computedValues) const
129 {
130 HTMLElement* innerEditor = innerEditorElement();
131 ASSERT(innerEditor);
132 if (RenderBox* innerEditorBox = innerEditor->renderBox()) {
133 LayoutUnit nonContentHeight = innerEditorBox->borderAndPaddingHeight() + innerEditorBox->marginHeight();
134 logicalHeight = computeControlLogicalHeight(innerEditorBox->lineHeight(true, HorizontalLine, PositionOfInteriorLineBoxes), nonContentHeight);
135
136 // We are able to have a horizontal scrollbar if the overflow style is scroll, or if its auto and there's no word wrap.
137 if ((isHorizontalWritingMode() && (style()->overflowX() == OSCROLL || (style()->overflowX() == OAUTO && innerEditor->renderer()->style()->overflowWrap() == NormalOverflowWrap)))
138 || (!isHorizontalWritingMode() && (style()->overflowY() == OSCROLL || (style()->overflowY() == OAUTO && innerEditor->renderer()->style()->overflowWrap() == NormalOverflowWrap))))
139 logicalHeight += scrollbarThickness();
140
141 // FIXME: The logical height of the inner text box should have been added before calling computeLogicalHeight to
142 // avoid this hack.
143 updateIntrinsicContentLogicalHeight(logicalHeight);
144
145 logicalHeight += borderAndPaddingHeight();
146 }
147
148 RenderBox::computeLogicalHeight(logicalHeight, logicalTop, computedValues);
149 }
150
hitInnerEditorElement(HitTestResult & result,const LayoutPoint & pointInContainer,const LayoutPoint & accumulatedOffset)151 void RenderTextControl::hitInnerEditorElement(HitTestResult& result, const LayoutPoint& pointInContainer, const LayoutPoint& accumulatedOffset)
152 {
153 HTMLElement* innerEditor = innerEditorElement();
154 if (!innerEditor->renderer())
155 return;
156
157 LayoutPoint adjustedLocation = accumulatedOffset + location();
158 LayoutPoint localPoint = pointInContainer - toLayoutSize(adjustedLocation + innerEditor->renderBox()->location());
159 if (hasOverflowClip())
160 localPoint += scrolledContentOffset();
161 result.setInnerNode(innerEditor);
162 result.setInnerNonSharedNode(innerEditor);
163 result.setLocalPoint(localPoint);
164 }
165
166 static const char* const fontFamiliesWithInvalidCharWidth[] = {
167 "American Typewriter",
168 "Arial Hebrew",
169 "Chalkboard",
170 "Cochin",
171 "Corsiva Hebrew",
172 "Courier",
173 "Euphemia UCAS",
174 "Geneva",
175 "Gill Sans",
176 "Hei",
177 "Helvetica",
178 "Hoefler Text",
179 "InaiMathi",
180 "Kai",
181 "Lucida Grande",
182 "Marker Felt",
183 "Monaco",
184 "Mshtakan",
185 "New Peninim MT",
186 "Osaka",
187 "Raanana",
188 "STHeiti",
189 "Symbol",
190 "Times",
191 "Apple Braille",
192 "Apple LiGothic",
193 "Apple LiSung",
194 "Apple Symbols",
195 "AppleGothic",
196 "AppleMyungjo",
197 "#GungSeo",
198 "#HeadLineA",
199 "#PCMyungjo",
200 "#PilGi",
201 };
202
203 // For font families where any of the fonts don't have a valid entry in the OS/2 table
204 // for avgCharWidth, fallback to the legacy webkit behavior of getting the avgCharWidth
205 // from the width of a '0'. This only seems to apply to a fixed number of Mac fonts,
206 // but, in order to get similar rendering across platforms, we do this check for
207 // all platforms.
hasValidAvgCharWidth(AtomicString family)208 bool RenderTextControl::hasValidAvgCharWidth(AtomicString family)
209 {
210 static HashSet<AtomicString>* fontFamiliesWithInvalidCharWidthMap = 0;
211
212 if (family.isEmpty())
213 return false;
214
215 if (!fontFamiliesWithInvalidCharWidthMap) {
216 fontFamiliesWithInvalidCharWidthMap = new HashSet<AtomicString>;
217
218 for (size_t i = 0; i < WTF_ARRAY_LENGTH(fontFamiliesWithInvalidCharWidth); ++i)
219 fontFamiliesWithInvalidCharWidthMap->add(AtomicString(fontFamiliesWithInvalidCharWidth[i]));
220 }
221
222 return !fontFamiliesWithInvalidCharWidthMap->contains(family);
223 }
224
getAvgCharWidth(AtomicString family)225 float RenderTextControl::getAvgCharWidth(AtomicString family)
226 {
227 if (hasValidAvgCharWidth(family))
228 return roundf(style()->font().primaryFont()->avgCharWidth());
229
230 const UChar ch = '0';
231 const String str = String(&ch, 1);
232 const Font& font = style()->font();
233 TextRun textRun = constructTextRun(this, font, str, style(), TextRun::AllowTrailingExpansion);
234 return font.width(textRun);
235 }
236
scaleEmToUnits(int x) const237 float RenderTextControl::scaleEmToUnits(int x) const
238 {
239 // This matches the unitsPerEm value for MS Shell Dlg and Courier New from the "head" font table.
240 float unitsPerEm = 2048.0f;
241 return roundf(style()->font().fontDescription().computedSize() * x / unitsPerEm);
242 }
243
computeIntrinsicLogicalWidths(LayoutUnit & minLogicalWidth,LayoutUnit & maxLogicalWidth) const244 void RenderTextControl::computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const
245 {
246 // Use average character width. Matches IE.
247 AtomicString family = style()->font().fontDescription().family().family();
248 maxLogicalWidth = preferredContentLogicalWidth(const_cast<RenderTextControl*>(this)->getAvgCharWidth(family));
249 if (RenderBox* innerEditorRenderBox = innerEditorElement()->renderBox())
250 maxLogicalWidth += innerEditorRenderBox->paddingStart() + innerEditorRenderBox->paddingEnd();
251 if (!style()->logicalWidth().isPercent())
252 minLogicalWidth = maxLogicalWidth;
253 }
254
computePreferredLogicalWidths()255 void RenderTextControl::computePreferredLogicalWidths()
256 {
257 ASSERT(preferredLogicalWidthsDirty());
258
259 m_minPreferredLogicalWidth = 0;
260 m_maxPreferredLogicalWidth = 0;
261 RenderStyle* styleToUse = style();
262
263 if (styleToUse->logicalWidth().isFixed() && styleToUse->logicalWidth().value() >= 0)
264 m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth = adjustContentBoxLogicalWidthForBoxSizing(styleToUse->logicalWidth().value());
265 else
266 computeIntrinsicLogicalWidths(m_minPreferredLogicalWidth, m_maxPreferredLogicalWidth);
267
268 if (styleToUse->logicalMinWidth().isFixed() && styleToUse->logicalMinWidth().value() > 0) {
269 m_maxPreferredLogicalWidth = std::max(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->logicalMinWidth().value()));
270 m_minPreferredLogicalWidth = std::max(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->logicalMinWidth().value()));
271 }
272
273 if (styleToUse->logicalMaxWidth().isFixed()) {
274 m_maxPreferredLogicalWidth = std::min(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->logicalMaxWidth().value()));
275 m_minPreferredLogicalWidth = std::min(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->logicalMaxWidth().value()));
276 }
277
278 LayoutUnit toAdd = borderAndPaddingLogicalWidth();
279
280 m_minPreferredLogicalWidth += toAdd;
281 m_maxPreferredLogicalWidth += toAdd;
282
283 clearPreferredLogicalWidthsDirty();
284 }
285
addFocusRingRects(Vector<LayoutRect> & rects,const LayoutPoint & additionalOffset,const RenderLayerModelObject *) const286 void RenderTextControl::addFocusRingRects(Vector<LayoutRect>& rects, const LayoutPoint& additionalOffset, const RenderLayerModelObject*) const
287 {
288 if (!size().isEmpty())
289 rects.append(LayoutRect(additionalOffset, size()));
290 }
291
layoutSpecialExcludedChild(bool relayoutChildren,SubtreeLayoutScope & layoutScope)292 RenderObject* RenderTextControl::layoutSpecialExcludedChild(bool relayoutChildren, SubtreeLayoutScope& layoutScope)
293 {
294 HTMLElement* placeholder = toHTMLTextFormControlElement(node())->placeholderElement();
295 RenderObject* placeholderRenderer = placeholder ? placeholder->renderer() : 0;
296 if (!placeholderRenderer)
297 return 0;
298 if (relayoutChildren)
299 layoutScope.setChildNeedsLayout(placeholderRenderer);
300 return placeholderRenderer;
301 }
302
303 } // namespace blink
304