1/* 2 * This file is part of the select element renderer in WebCore. 3 * 4 * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). 5 * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved. 6 * 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/) 7 * 8 * This library is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Library General Public 10 * License as published by the Free Software Foundation; either 11 * version 2 of the License, or (at your option) any later version. 12 * 13 * This library is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Library General Public License for more details. 17 * 18 * You should have received a copy of the GNU Library General Public License 19 * along with this library; see the file COPYING.LIB. If not, write to 20 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 21 * Boston, MA 02110-1301, USA. 22 * 23 */ 24 25#include "config.h" 26#include "RenderMenuList.h" 27 28#include "AXObjectCache.h" 29#include "Chrome.h" 30#include "CSSStyleSelector.h" 31#include "Frame.h" 32#include "FrameView.h" 33#include "HTMLNames.h" 34#include "NodeRenderStyle.h" 35#include "OptionElement.h" 36#include "OptionGroupElement.h" 37#include "PopupMenu.h" 38#include "RenderBR.h" 39#include "RenderScrollbar.h" 40#include "RenderTheme.h" 41#include "SelectElement.h" 42#include "TextRun.h" 43#include <math.h> 44 45using namespace std; 46 47namespace WebCore { 48 49using namespace HTMLNames; 50 51RenderMenuList::RenderMenuList(Element* element) 52 : RenderFlexibleBox(element) 53 , m_buttonText(0) 54 , m_innerBlock(0) 55 , m_optionsChanged(true) 56 , m_optionsWidth(0) 57 , m_lastSelectedIndex(-1) 58 , m_popupIsVisible(false) 59{ 60} 61 62RenderMenuList::~RenderMenuList() 63{ 64 if (m_popup) 65 m_popup->disconnectClient(); 66 m_popup = 0; 67} 68 69void RenderMenuList::createInnerBlock() 70{ 71 if (m_innerBlock) { 72 ASSERT(firstChild() == m_innerBlock); 73 ASSERT(!m_innerBlock->nextSibling()); 74 return; 75 } 76 77 // Create an anonymous block. 78 ASSERT(!firstChild()); 79 m_innerBlock = createAnonymousBlock(); 80 adjustInnerStyle(); 81 RenderFlexibleBox::addChild(m_innerBlock); 82} 83 84void RenderMenuList::adjustInnerStyle() 85{ 86 RenderStyle* innerStyle = m_innerBlock->style(); 87 innerStyle->setBoxFlex(1); 88 89 innerStyle->setPaddingLeft(Length(theme()->popupInternalPaddingLeft(style()), Fixed)); 90 innerStyle->setPaddingRight(Length(theme()->popupInternalPaddingRight(style()), Fixed)); 91 innerStyle->setPaddingTop(Length(theme()->popupInternalPaddingTop(style()), Fixed)); 92 innerStyle->setPaddingBottom(Length(theme()->popupInternalPaddingBottom(style()), Fixed)); 93 94 if (document()->page()->chrome()->selectItemWritingDirectionIsNatural()) { 95 // Items in the popup will not respect the CSS text-align and direction properties, 96 // so we must adjust our own style to match. 97 innerStyle->setTextAlign(LEFT); 98 TextDirection direction = (m_buttonText && m_buttonText->text()->defaultWritingDirection() == WTF::Unicode::RightToLeft) ? RTL : LTR; 99 innerStyle->setDirection(direction); 100 } else if (m_optionStyle && document()->page()->chrome()->selectItemAlignmentFollowsMenuWritingDirection()) { 101 if ((m_optionStyle->direction() != innerStyle->direction() || m_optionStyle->unicodeBidi() != innerStyle->unicodeBidi())) 102 m_innerBlock->setNeedsLayoutAndPrefWidthsRecalc(); 103 innerStyle->setTextAlign(style()->isLeftToRightDirection() ? LEFT : RIGHT); 104 innerStyle->setDirection(m_optionStyle->direction()); 105 innerStyle->setUnicodeBidi(m_optionStyle->unicodeBidi()); 106 } 107} 108 109void RenderMenuList::addChild(RenderObject* newChild, RenderObject* beforeChild) 110{ 111 createInnerBlock(); 112 m_innerBlock->addChild(newChild, beforeChild); 113 ASSERT(m_innerBlock == firstChild()); 114} 115 116void RenderMenuList::removeChild(RenderObject* oldChild) 117{ 118 if (oldChild == m_innerBlock || !m_innerBlock) { 119 RenderFlexibleBox::removeChild(oldChild); 120 m_innerBlock = 0; 121 } else 122 m_innerBlock->removeChild(oldChild); 123} 124 125void RenderMenuList::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle) 126{ 127 RenderBlock::styleDidChange(diff, oldStyle); 128 129 if (m_buttonText) 130 m_buttonText->setStyle(style()); 131 if (m_innerBlock) // RenderBlock handled updating the anonymous block's style. 132 adjustInnerStyle(); 133 134 bool fontChanged = !oldStyle || oldStyle->font() != style()->font(); 135 if (fontChanged) 136 updateOptionsWidth(); 137} 138 139void RenderMenuList::updateOptionsWidth() 140{ 141 float maxOptionWidth = 0; 142 const Vector<Element*>& listItems = toSelectElement(static_cast<Element*>(node()))->listItems(); 143 int size = listItems.size(); 144 for (int i = 0; i < size; ++i) { 145 Element* element = listItems[i]; 146 OptionElement* optionElement = toOptionElement(element); 147 if (!optionElement) 148 continue; 149 150 String text = optionElement->textIndentedToRespectGroupLabel(); 151 if (theme()->popupOptionSupportsTextIndent()) { 152 // Add in the option's text indent. We can't calculate percentage values for now. 153 float optionWidth = 0; 154 if (RenderStyle* optionStyle = element->renderStyle()) 155 optionWidth += optionStyle->textIndent().calcMinValue(0); 156 if (!text.isEmpty()) 157 optionWidth += style()->font().width(text); 158 maxOptionWidth = max(maxOptionWidth, optionWidth); 159 } else if (!text.isEmpty()) 160 maxOptionWidth = max(maxOptionWidth, style()->font().width(text)); 161 } 162 163 int width = static_cast<int>(ceilf(maxOptionWidth)); 164 if (m_optionsWidth == width) 165 return; 166 167 m_optionsWidth = width; 168 if (parent()) 169 setNeedsLayoutAndPrefWidthsRecalc(); 170} 171 172void RenderMenuList::updateFromElement() 173{ 174 if (m_optionsChanged) { 175 updateOptionsWidth(); 176 m_optionsChanged = false; 177 } 178 179 if (m_popupIsVisible) 180 m_popup->updateFromElement(); 181 else 182 setTextFromOption(toSelectElement(static_cast<Element*>(node()))->selectedIndex()); 183} 184 185void RenderMenuList::setTextFromOption(int optionIndex) 186{ 187 SelectElement* select = toSelectElement(static_cast<Element*>(node())); 188 const Vector<Element*>& listItems = select->listItems(); 189 int size = listItems.size(); 190 191 int i = select->optionToListIndex(optionIndex); 192 String text = ""; 193 if (i >= 0 && i < size) { 194 Element* element = listItems[i]; 195 if (OptionElement* optionElement = toOptionElement(element)) { 196 text = optionElement->textIndentedToRespectGroupLabel(); 197 m_optionStyle = element->renderStyle(); 198 } 199 } 200 201 setText(text.stripWhiteSpace()); 202} 203 204void RenderMenuList::setText(const String& s) 205{ 206 if (s.isEmpty()) { 207 if (!m_buttonText || !m_buttonText->isBR()) { 208 if (m_buttonText) 209 m_buttonText->destroy(); 210 m_buttonText = new (renderArena()) RenderBR(document()); 211 m_buttonText->setStyle(style()); 212 addChild(m_buttonText); 213 } 214 } else { 215 if (m_buttonText && !m_buttonText->isBR()) 216 m_buttonText->setText(s.impl()); 217 else { 218 if (m_buttonText) 219 m_buttonText->destroy(); 220 m_buttonText = new (renderArena()) RenderText(document(), s.impl()); 221 m_buttonText->setStyle(style()); 222 addChild(m_buttonText); 223 } 224 adjustInnerStyle(); 225 } 226} 227 228String RenderMenuList::text() const 229{ 230 return m_buttonText ? m_buttonText->text() : 0; 231} 232 233IntRect RenderMenuList::controlClipRect(int tx, int ty) const 234{ 235 // Clip to the intersection of the content box and the content box for the inner box 236 // This will leave room for the arrows which sit in the inner box padding, 237 // and if the inner box ever spills out of the outer box, that will get clipped too. 238 IntRect outerBox(tx + borderLeft() + paddingLeft(), 239 ty + borderTop() + paddingTop(), 240 contentWidth(), 241 contentHeight()); 242 243 IntRect innerBox(tx + m_innerBlock->x() + m_innerBlock->paddingLeft(), 244 ty + m_innerBlock->y() + m_innerBlock->paddingTop(), 245 m_innerBlock->contentWidth(), 246 m_innerBlock->contentHeight()); 247 248 return intersection(outerBox, innerBox); 249} 250 251void RenderMenuList::computePreferredLogicalWidths() 252{ 253 m_minPreferredLogicalWidth = 0; 254 m_maxPreferredLogicalWidth = 0; 255 256 if (style()->width().isFixed() && style()->width().value() > 0) 257 m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth = computeContentBoxLogicalWidth(style()->width().value()); 258 else 259 m_maxPreferredLogicalWidth = max(m_optionsWidth, theme()->minimumMenuListSize(style())) + m_innerBlock->paddingLeft() + m_innerBlock->paddingRight(); 260 261 if (style()->minWidth().isFixed() && style()->minWidth().value() > 0) { 262 m_maxPreferredLogicalWidth = max(m_maxPreferredLogicalWidth, computeContentBoxLogicalWidth(style()->minWidth().value())); 263 m_minPreferredLogicalWidth = max(m_minPreferredLogicalWidth, computeContentBoxLogicalWidth(style()->minWidth().value())); 264 } else if (style()->width().isPercent() || (style()->width().isAuto() && style()->height().isPercent())) 265 m_minPreferredLogicalWidth = 0; 266 else 267 m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth; 268 269 if (style()->maxWidth().isFixed() && style()->maxWidth().value() != undefinedLength) { 270 m_maxPreferredLogicalWidth = min(m_maxPreferredLogicalWidth, computeContentBoxLogicalWidth(style()->maxWidth().value())); 271 m_minPreferredLogicalWidth = min(m_minPreferredLogicalWidth, computeContentBoxLogicalWidth(style()->maxWidth().value())); 272 } 273 274 int toAdd = borderAndPaddingWidth(); 275 m_minPreferredLogicalWidth += toAdd; 276 m_maxPreferredLogicalWidth += toAdd; 277 278 setPreferredLogicalWidthsDirty(false); 279} 280 281void RenderMenuList::showPopup() 282{ 283 if (m_popupIsVisible) 284 return; 285 286 // Create m_innerBlock here so it ends up as the first child. 287 // This is important because otherwise we might try to create m_innerBlock 288 // inside the showPopup call and it would fail. 289 createInnerBlock(); 290 if (!m_popup) 291 m_popup = document()->page()->chrome()->createPopupMenu(this); 292 SelectElement* select = toSelectElement(static_cast<Element*>(node())); 293 m_popupIsVisible = true; 294 295 // Compute the top left taking transforms into account, but use 296 // the actual width of the element to size the popup. 297 FloatPoint absTopLeft = localToAbsolute(FloatPoint(), false, true); 298 IntRect absBounds = absoluteBoundingBoxRect(); 299 absBounds.setLocation(roundedIntPoint(absTopLeft)); 300 m_popup->show(absBounds, document()->view(), 301 select->optionToListIndex(select->selectedIndex())); 302} 303 304void RenderMenuList::hidePopup() 305{ 306 if (m_popup) 307 m_popup->hide(); 308} 309 310void RenderMenuList::valueChanged(unsigned listIndex, bool fireOnChange) 311{ 312 // Check to ensure a page navigation has not occurred while 313 // the popup was up. 314 Document* doc = static_cast<Element*>(node())->document(); 315 if (!doc || doc != doc->frame()->document()) 316 return; 317 318 SelectElement* select = toSelectElement(static_cast<Element*>(node())); 319 select->setSelectedIndexByUser(select->listToOptionIndex(listIndex), true, fireOnChange); 320} 321 322#if ENABLE(NO_LISTBOX_RENDERING) 323void RenderMenuList::listBoxSelectItem(int listIndex, bool allowMultiplySelections, bool shift, bool fireOnChangeNow) 324{ 325 SelectElement* select = toSelectElement(static_cast<Element*>(node())); 326 select->listBoxSelectItem(listIndex, allowMultiplySelections, shift, fireOnChangeNow); 327} 328 329bool RenderMenuList::multiple() 330{ 331 SelectElement* select = toSelectElement(static_cast<Element*>(node())); 332 return select->multiple(); 333} 334#endif 335 336void RenderMenuList::didSetSelectedIndex() 337{ 338 int index = selectedIndex(); 339 if (m_lastSelectedIndex == index) 340 return; 341 342 m_lastSelectedIndex = index; 343 344 if (AXObjectCache::accessibilityEnabled()) 345 document()->axObjectCache()->postNotification(this, AXObjectCache::AXMenuListValueChanged, true, PostSynchronously); 346} 347 348String RenderMenuList::itemText(unsigned listIndex) const 349{ 350 SelectElement* select = toSelectElement(static_cast<Element*>(node())); 351 const Vector<Element*>& listItems = select->listItems(); 352 if (listIndex >= listItems.size()) 353 return String(); 354 Element* element = listItems[listIndex]; 355 if (OptionGroupElement* optionGroupElement = toOptionGroupElement(element)) 356 return optionGroupElement->groupLabelText(); 357 else if (OptionElement* optionElement = toOptionElement(element)) 358 return optionElement->textIndentedToRespectGroupLabel(); 359 return String(); 360} 361 362String RenderMenuList::itemLabel(unsigned) const 363{ 364 return String(); 365} 366 367String RenderMenuList::itemIcon(unsigned) const 368{ 369 return String(); 370} 371 372String RenderMenuList::itemAccessibilityText(unsigned listIndex) const 373{ 374 // Allow the accessible name be changed if necessary. 375 SelectElement* select = toSelectElement(static_cast<Element*>(node())); 376 const Vector<Element*>& listItems = select->listItems(); 377 if (listIndex >= listItems.size()) 378 return String(); 379 380 return listItems[listIndex]->getAttribute(aria_labelAttr); 381} 382 383String RenderMenuList::itemToolTip(unsigned listIndex) const 384{ 385 SelectElement* select = toSelectElement(static_cast<Element*>(node())); 386 const Vector<Element*>& listItems = select->listItems(); 387 if (listIndex >= listItems.size()) 388 return String(); 389 Element* element = listItems[listIndex]; 390 return element->title(); 391} 392 393bool RenderMenuList::itemIsEnabled(unsigned listIndex) const 394{ 395 SelectElement* select = toSelectElement(static_cast<Element*>(node())); 396 const Vector<Element*>& listItems = select->listItems(); 397 if (listIndex >= listItems.size()) 398 return false; 399 Element* element = listItems[listIndex]; 400 if (!isOptionElement(element)) 401 return false; 402 403 bool groupEnabled = true; 404 if (Element* parentElement = element->parentElement()) { 405 if (isOptionGroupElement(parentElement)) 406 groupEnabled = parentElement->isEnabledFormControl(); 407 } 408 if (!groupEnabled) 409 return false; 410 411 return element->isEnabledFormControl(); 412} 413 414PopupMenuStyle RenderMenuList::itemStyle(unsigned listIndex) const 415{ 416 SelectElement* select = toSelectElement(static_cast<Element*>(node())); 417 const Vector<Element*>& listItems = select->listItems(); 418 if (listIndex >= listItems.size()) { 419 // If we are making an out of bounds access, then we want to use the style 420 // of a different option element (index 0). However, if there isn't an option element 421 // before at index 0, we fall back to the menu's style. 422 if (!listIndex) 423 return menuStyle(); 424 425 // Try to retrieve the style of an option element we know exists (index 0). 426 listIndex = 0; 427 } 428 Element* element = listItems[listIndex]; 429 430 RenderStyle* style = element->renderStyle() ? element->renderStyle() : element->computedStyle(); 431 return style ? PopupMenuStyle(style->visitedDependentColor(CSSPropertyColor), itemBackgroundColor(listIndex), style->font(), style->visibility() == VISIBLE, style->display() == NONE, style->textIndent(), style->direction(), style->unicodeBidi() == Override) : menuStyle(); 432} 433 434Color RenderMenuList::itemBackgroundColor(unsigned listIndex) const 435{ 436 SelectElement* select = toSelectElement(static_cast<Element*>(node())); 437 const Vector<Element*>& listItems = select->listItems(); 438 if (listIndex >= listItems.size()) 439 return style()->visitedDependentColor(CSSPropertyBackgroundColor); 440 Element* element = listItems[listIndex]; 441 442 Color backgroundColor; 443 if (element->renderStyle()) 444 backgroundColor = element->renderStyle()->visitedDependentColor(CSSPropertyBackgroundColor); 445 // If the item has an opaque background color, return that. 446 if (!backgroundColor.hasAlpha()) 447 return backgroundColor; 448 449 // Otherwise, the item's background is overlayed on top of the menu background. 450 backgroundColor = style()->visitedDependentColor(CSSPropertyBackgroundColor).blend(backgroundColor); 451 if (!backgroundColor.hasAlpha()) 452 return backgroundColor; 453 454 // If the menu background is not opaque, then add an opaque white background behind. 455 return Color(Color::white).blend(backgroundColor); 456} 457 458PopupMenuStyle RenderMenuList::menuStyle() const 459{ 460 RenderStyle* s = m_innerBlock ? m_innerBlock->style() : style(); 461 return PopupMenuStyle(s->visitedDependentColor(CSSPropertyColor), s->visitedDependentColor(CSSPropertyBackgroundColor), s->font(), s->visibility() == VISIBLE, s->display() == NONE, s->textIndent(), style()->direction(), style()->unicodeBidi() == Override); 462} 463 464HostWindow* RenderMenuList::hostWindow() const 465{ 466 return document()->view()->hostWindow(); 467} 468 469PassRefPtr<Scrollbar> RenderMenuList::createScrollbar(ScrollableArea* scrollableArea, ScrollbarOrientation orientation, ScrollbarControlSize controlSize) 470{ 471 RefPtr<Scrollbar> widget; 472 bool hasCustomScrollbarStyle = style()->hasPseudoStyle(SCROLLBAR); 473 if (hasCustomScrollbarStyle) 474 widget = RenderScrollbar::createCustomScrollbar(scrollableArea, orientation, this); 475 else 476 widget = Scrollbar::createNativeScrollbar(scrollableArea, orientation, controlSize); 477 return widget.release(); 478} 479 480int RenderMenuList::clientInsetLeft() const 481{ 482 return 0; 483} 484 485int RenderMenuList::clientInsetRight() const 486{ 487 return 0; 488} 489 490int RenderMenuList::clientPaddingLeft() const 491{ 492 return paddingLeft() + m_innerBlock->paddingLeft(); 493} 494 495const int endOfLinePadding = 2; 496int RenderMenuList::clientPaddingRight() const 497{ 498 if (style()->appearance() == MenulistPart || style()->appearance() == MenulistButtonPart) { 499 // For these appearance values, the theme applies padding to leave room for the 500 // drop-down button. But leaving room for the button inside the popup menu itself 501 // looks strange, so we return a small default padding to avoid having a large empty 502 // space appear on the side of the popup menu. 503 return endOfLinePadding; 504 } 505 506 // If the appearance isn't MenulistPart, then the select is styled (non-native), so 507 // we want to return the user specified padding. 508 return paddingRight() + m_innerBlock->paddingRight(); 509} 510 511int RenderMenuList::listSize() const 512{ 513 SelectElement* select = toSelectElement(static_cast<Element*>(node())); 514 return select->listItems().size(); 515} 516 517int RenderMenuList::selectedIndex() const 518{ 519 SelectElement* select = toSelectElement(static_cast<Element*>(node())); 520 return select->optionToListIndex(select->selectedIndex()); 521} 522 523void RenderMenuList::popupDidHide() 524{ 525 m_popupIsVisible = false; 526} 527 528bool RenderMenuList::itemIsSeparator(unsigned listIndex) const 529{ 530 SelectElement* select = toSelectElement(static_cast<Element*>(node())); 531 const Vector<Element*>& listItems = select->listItems(); 532 if (listIndex >= listItems.size()) 533 return false; 534 Element* element = listItems[listIndex]; 535 return element->hasTagName(hrTag); 536} 537 538bool RenderMenuList::itemIsLabel(unsigned listIndex) const 539{ 540 SelectElement* select = toSelectElement(static_cast<Element*>(node())); 541 const Vector<Element*>& listItems = select->listItems(); 542 if (listIndex >= listItems.size()) 543 return false; 544 Element* element = listItems[listIndex]; 545 return isOptionGroupElement(element); 546} 547 548bool RenderMenuList::itemIsSelected(unsigned listIndex) const 549{ 550 SelectElement* select = toSelectElement(static_cast<Element*>(node())); 551 const Vector<Element*>& listItems = select->listItems(); 552 if (listIndex >= listItems.size()) 553 return false; 554 Element* element = listItems[listIndex]; 555 if (OptionElement* optionElement = toOptionElement(element)) 556 return optionElement->selected(); 557 return false; 558} 559 560void RenderMenuList::setTextFromItem(unsigned listIndex) 561{ 562 SelectElement* select = toSelectElement(static_cast<Element*>(node())); 563 setTextFromOption(select->listToOptionIndex(listIndex)); 564} 565 566FontSelector* RenderMenuList::fontSelector() const 567{ 568 return document()->styleSelector()->fontSelector(); 569} 570 571} 572