third_party/WebKit/Source/core/layout/LayoutSearchField.cpp

   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/layout/LayoutSearchField.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 LayoutSearchField::LayoutSearchField(HTMLInputElement* element)
  39     : LayoutTextControlSingleLine(element)
  40 {
  41     ASSERT(element->type() == InputTypeNames::search);
  42 }
  43
  44 LayoutSearchField::~LayoutSearchField()
  45 {
  46 }
  47
  48 inline Element* LayoutSearchField::searchDecorationElement() const
  49 {
  50     return inputElement()->userAgentShadowRoot()->getElementById(ShadowElementNames::searchDecoration());
  51 }
  52
  53 inline Element* LayoutSearchField::cancelButtonElement() const
  54 {
  55     return inputElement()->userAgentShadowRoot()->getElementById(ShadowElementNames::clearButton());
  56 }
  57
  58 LayoutUnit LayoutSearchField::computeControlLogicalHeight(LayoutUnit lineHeight, LayoutUnit nonContentHeight) const
  59 {
  60     Element* searchDecoration = searchDecorationElement();
  61     if (LayoutBox* decorationLayoutObject = searchDecoration ? searchDecoration->layoutBox() : 0) {
  62         decorationLayoutObject->updateLogicalHeight();
  63         nonContentHeight = max(nonContentHeight, decorationLayoutObject->borderAndPaddingLogicalHeight() + decorationLayoutObject->marginLogicalHeight());
  64         lineHeight = max(lineHeight, decorationLayoutObject->logicalHeight());
  65     }
  66     Element* cancelButton = cancelButtonElement();
  67     if (LayoutBox* cancelLayoutObject = cancelButton ? cancelButton->layoutBox() : 0) {
  68         cancelLayoutObject->updateLogicalHeight();
  69         nonContentHeight = max(nonContentHeight, cancelLayoutObject->borderAndPaddingLogicalHeight() + cancelLayoutObject->marginLogicalHeight());
  70         lineHeight = max(lineHeight, cancelLayoutObject->logicalHeight());
  71     }
  72
  73     return lineHeight + nonContentHeight;
  74 }
  75
  76 LayoutUnit LayoutSearchField::computeLogicalHeightLimit() const
  77 {
  78     return logicalHeight();
  79 }
  80
  81 void LayoutSearchField::centerContainerIfNeeded(LayoutBox* containerLayoutObject) const
  82 {
  83     if (!containerLayoutObject)
  84         return;
  85
  86     if (containerLayoutObject->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 = containerLayoutObject->logicalHeight() - contentLogicalHeight();
  92     containerLayoutObject->setLogicalTop(containerLayoutObject->logicalTop() - (logicalHeightDiff / 2 + layoutMod(logicalHeightDiff, 2)));
  93 }
  94
  95 }