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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/InputTypeNames.h"
     28 #include "core/dom/shadow/ShadowRoot.h"
     29 #include "core/html/HTMLInputElement.h"
     30 #include "core/html/shadow/ShadowElementNames.h"
     31 
     32 namespace blink {
     33 
     34 using namespace HTMLNames;
     35 
     36 // ----------------------------
     37 
     38 RenderSearchField::RenderSearchField(HTMLInputElement* element)
     39     : RenderTextControlSingleLine(element)
     40 {
     41     ASSERT(element->type() == InputTypeNames::search);
     42 }
     43 
     44 RenderSearchField::~RenderSearchField()
     45 {
     46 }
     47 
     48 inline Element* RenderSearchField::searchDecorationElement() const
     49 {
     50     return inputElement()->userAgentShadowRoot()->getElementById(ShadowElementNames::searchDecoration());
     51 }
     52 
     53 inline Element* RenderSearchField::cancelButtonElement() const
     54 {
     55     return inputElement()->userAgentShadowRoot()->getElementById(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 LayoutUnit RenderSearchField::computeLogicalHeightLimit() const
     77 {
     78     return logicalHeight();
     79 }
     80 
     81 void RenderSearchField::centerContainerIfNeeded(RenderBox* containerRenderer) const
     82 {
     83     if (!containerRenderer)
     84         return;
     85 
     86     if (containerRenderer->logicalHeight() <= contentLogicalHeight())
     87         return;
     88 
     89     // A quirk for find-in-page box on Safari Windows.
     90     // http://webkit.org/b/63157
     91     LayoutUnit logicalHeightDiff = containerRenderer->logicalHeight() - contentLogicalHeight();
     92     containerRenderer->setLogicalTop(containerRenderer->logicalTop() - (logicalHeightDiff / 2 + layoutMod(logicalHeightDiff, 2)));
     93 }
     94 
     95 }
     96