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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/dom/shadow/ShadowRoot.h"
     28 #include "core/html/HTMLInputElement.h"
     29 #include "core/html/shadow/ShadowElementNames.h"
     30 
     31 using namespace std;
     32 
     33 namespace WebCore {
     34 
     35 using namespace HTMLNames;
     36 
     37 // ----------------------------
     38 
     39 RenderSearchField::RenderSearchField(HTMLInputElement* element)
     40     : RenderTextControlSingleLine(element)
     41 {
     42     ASSERT(element->isSearchField());
     43 }
     44 
     45 RenderSearchField::~RenderSearchField()
     46 {
     47 }
     48 
     49 inline Element* RenderSearchField::searchDecorationElement() const
     50 {
     51     return inputElement()->userAgentShadowRoot()->getElementById(ShadowElementNames::searchDecoration());
     52 }
     53 
     54 inline Element* RenderSearchField::cancelButtonElement() const
     55 {
     56     return inputElement()->userAgentShadowRoot()->getElementById(ShadowElementNames::clearButton());
     57 }
     58 
     59 LayoutUnit RenderSearchField::computeControlLogicalHeight(LayoutUnit lineHeight, LayoutUnit nonContentHeight) const
     60 {
     61     Element* searchDecoration = searchDecorationElement();
     62     if (RenderBox* decorationRenderer = searchDecoration ? searchDecoration->renderBox() : 0) {
     63         decorationRenderer->updateLogicalHeight();
     64         nonContentHeight = max(nonContentHeight, decorationRenderer->borderAndPaddingLogicalHeight() + decorationRenderer->marginLogicalHeight());
     65         lineHeight = max(lineHeight, decorationRenderer->logicalHeight());
     66     }
     67     Element* cancelButton = cancelButtonElement();
     68     if (RenderBox* cancelRenderer = cancelButton ? cancelButton->renderBox() : 0) {
     69         cancelRenderer->updateLogicalHeight();
     70         nonContentHeight = max(nonContentHeight, cancelRenderer->borderAndPaddingLogicalHeight() + cancelRenderer->marginLogicalHeight());
     71         lineHeight = max(lineHeight, cancelRenderer->logicalHeight());
     72     }
     73 
     74     return lineHeight + nonContentHeight;
     75 }
     76 
     77 LayoutUnit RenderSearchField::computeLogicalHeightLimit() const
     78 {
     79     return logicalHeight();
     80 }
     81 
     82 void RenderSearchField::centerContainerIfNeeded(RenderBox* containerRenderer) const
     83 {
     84     if (!containerRenderer)
     85         return;
     86 
     87     if (containerRenderer->logicalHeight() <= contentLogicalHeight())
     88         return;
     89 
     90     // A quirk for find-in-page box on Safari Windows.
     91     // http://webkit.org/b/63157
     92     LayoutUnit logicalHeightDiff = containerRenderer->logicalHeight() - contentLogicalHeight();
     93     containerRenderer->setLogicalTop(containerRenderer->logicalTop() - (logicalHeightDiff / 2 + layoutMod(logicalHeightDiff, 2)));
     94 }
     95 
     96 }
     97