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      1 /**
      2  * Copyright (C) 2006, 2007, 2010 Apple Inc. All rights reserved.
      3  *           (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
      4  * Copyright (C) 2010 Google Inc. All rights reserved.
      5  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
      6  *
      7  * This library is free software; you can redistribute it and/or
      8  * modify it under the terms of the GNU Library General Public
      9  * License as published by the Free Software Foundation; either
     10  * version 2 of the License, or (at your option) any later version.
     11  *
     12  * This library is distributed in the hope that it will be useful,
     13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     15  * Library General Public License for more details.
     16  *
     17  * You should have received a copy of the GNU Library General Public License
     18  * along with this library; see the file COPYING.LIB.  If not, write to
     19  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     20  * Boston, MA 02110-1301, USA.
     21  *
     22  */
     23 
     24 #include "config.h"
     25 #include "core/rendering/RenderSearchField.h"
     26 
     27 #include "core/html/HTMLInputElement.h"
     28 #include "core/html/shadow/ShadowElementNames.h"
     29 
     30 using namespace std;
     31 
     32 namespace WebCore {
     33 
     34 using namespace HTMLNames;
     35 
     36 // ----------------------------
     37 
     38 RenderSearchField::RenderSearchField(HTMLInputElement* element)
     39     : RenderTextControlSingleLine(element)
     40 {
     41     ASSERT(element->isSearchField());
     42 }
     43 
     44 RenderSearchField::~RenderSearchField()
     45 {
     46 }
     47 
     48 inline Element* RenderSearchField::searchDecorationElement() const
     49 {
     50     return inputElement()->uaShadowElementById(ShadowElementNames::searchDecoration());
     51 }
     52 
     53 inline Element* RenderSearchField::cancelButtonElement() const
     54 {
     55     return inputElement()->uaShadowElementById(ShadowElementNames::clearButton());
     56 }
     57 
     58 LayoutUnit RenderSearchField::computeControlLogicalHeight(LayoutUnit lineHeight, LayoutUnit nonContentHeight) const
     59 {
     60     Element* searchDecoration = searchDecorationElement();
     61     if (RenderBox* decorationRenderer = searchDecoration ? searchDecoration->renderBox() : 0) {
     62         decorationRenderer->updateLogicalHeight();
     63         nonContentHeight = max(nonContentHeight, decorationRenderer->borderAndPaddingLogicalHeight() + decorationRenderer->marginLogicalHeight());
     64         lineHeight = max(lineHeight, decorationRenderer->logicalHeight());
     65     }
     66     Element* cancelButton = cancelButtonElement();
     67     if (RenderBox* cancelRenderer = cancelButton ? cancelButton->renderBox() : 0) {
     68         cancelRenderer->updateLogicalHeight();
     69         nonContentHeight = max(nonContentHeight, cancelRenderer->borderAndPaddingLogicalHeight() + cancelRenderer->marginLogicalHeight());
     70         lineHeight = max(lineHeight, cancelRenderer->logicalHeight());
     71     }
     72 
     73     return lineHeight + nonContentHeight;
     74 }
     75 
     76 void RenderSearchField::updateFromElement()
     77 {
     78     RenderTextControlSingleLine::updateFromElement();
     79 
     80     if (cancelButtonElement())
     81         updateCancelButtonVisibility();
     82 }
     83 
     84 void RenderSearchField::updateCancelButtonVisibility() const
     85 {
     86     RenderObject* cancelButtonRenderer = cancelButtonElement()->renderer();
     87     if (!cancelButtonRenderer)
     88         return;
     89 
     90     const RenderStyle* curStyle = cancelButtonRenderer->style();
     91     EVisibility buttonVisibility = visibilityForCancelButton();
     92     if (curStyle->visibility() == buttonVisibility)
     93         return;
     94 
     95     RefPtr<RenderStyle> cancelButtonStyle = RenderStyle::clone(curStyle);
     96     cancelButtonStyle->setVisibility(buttonVisibility);
     97     cancelButtonRenderer->setStyle(cancelButtonStyle);
     98 }
     99 
    100 EVisibility RenderSearchField::visibilityForCancelButton() const
    101 {
    102     return (style()->visibility() == HIDDEN || inputElement()->value().isEmpty()) ? HIDDEN : VISIBLE;
    103 }
    104 
    105 LayoutUnit RenderSearchField::computeLogicalHeightLimit() const
    106 {
    107     return logicalHeight();
    108 }
    109 
    110 void RenderSearchField::centerContainerIfNeeded(RenderBox* containerRenderer) const
    111 {
    112     if (!containerRenderer)
    113         return;
    114 
    115     if (containerRenderer->logicalHeight() <= contentLogicalHeight())
    116         return;
    117 
    118     // A quirk for find-in-page box on Safari Windows.
    119     // http://webkit.org/b/63157
    120     LayoutUnit logicalHeightDiff = containerRenderer->logicalHeight() - contentLogicalHeight();
    121     containerRenderer->setLogicalTop(containerRenderer->logicalTop() - (logicalHeightDiff / 2 + layoutMod(logicalHeightDiff, 2)));
    122 }
    123 
    124 }
    125