src/third_party/WebKit/Source/web/ValidationMessageClientImpl.cpp

   1 /*
   2  * Copyright (C) 2012 Google Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1.  Redistributions of source code must retain the above copyright
   8  *     notice, this list of conditions and the following disclaimer.
   9  * 2.  Redistributions in binary form must reproduce the above copyright
  10  *     notice, this list of conditions and the following disclaimer in the
  11  *     documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND
  14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  16  * ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE
  17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  19  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  20  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  23  * SUCH DAMAGE.
  24  */
  25
  26 #include "config.h"
  27 #include "web/ValidationMessageClientImpl.h"
  28
  29 #include "core/dom/Element.h"
  30 #include "core/frame/FrameView.h"
  31 #include "core/rendering/RenderObject.h"
  32 #include "platform/HostWindow.h"
  33 #include "public/platform/WebRect.h"
  34 #include "public/platform/WebString.h"
  35 #include "public/web/WebTextDirection.h"
  36 #include "public/web/WebViewClient.h"
  37 #include "web/WebViewImpl.h"
  38 #include "wtf/CurrentTime.h"
  39
  40 namespace blink {
  41
  42 ValidationMessageClientImpl::ValidationMessageClientImpl(WebViewImpl& webView)
  43     : m_webView(webView)
  44     , m_currentAnchor(nullptr)
  45     , m_lastPageScaleFactor(1)
  46     , m_finishTime(0)
  47     , m_timer(this, &ValidationMessageClientImpl::checkAnchorStatus)
  48 {
  49 }
  50
  51 PassOwnPtrWillBeRawPtr<ValidationMessageClientImpl> ValidationMessageClientImpl::create(WebViewImpl& webView)
  52 {
  53     return adoptPtrWillBeNoop(new ValidationMessageClientImpl(webView));
  54 }
  55
  56 ValidationMessageClientImpl::~ValidationMessageClientImpl()
  57 {
  58 }
  59
  60 FrameView* ValidationMessageClientImpl::currentView()
  61 {
  62     return m_currentAnchor->document().view();
  63 }
  64
  65 void ValidationMessageClientImpl::showValidationMessage(const Element& anchor, const String& message, TextDirection messageDir, const String& subMessage, TextDirection subMessageDir)
  66 {
  67     if (message.isEmpty()) {
  68         hideValidationMessage(anchor);
  69         return;
  70     }
  71     if (!anchor.renderBox())
  72         return;
  73     if (m_currentAnchor)
  74         hideValidationMessage(*m_currentAnchor);
  75     m_currentAnchor = &anchor;
  76     IntRect anchorInRootView = currentView()->contentsToRootView(anchor.pixelSnappedBoundingBox());
  77     m_lastAnchorRectInScreen = currentView()->hostWindow()->rootViewToScreen(anchorInRootView);
  78     m_lastPageScaleFactor = m_webView.pageScaleFactor();
  79     m_message = message;
  80     const double minimumSecondToShowValidationMessage = 5.0;
  81     const double secondPerCharacter = 0.05;
  82     const double statusCheckInterval = 0.1;
  83
  84     m_webView.client()->showValidationMessage(anchorInRootView, m_message, toWebTextDirection(messageDir),
  85         subMessage, toWebTextDirection(subMessageDir));
  86     m_webView.client()->showValidationMessage(anchorInRootView, m_message, subMessage, toWebTextDirection(messageDir));
  87
  88     m_finishTime = monotonicallyIncreasingTime() + std::max(minimumSecondToShowValidationMessage, (message.length() + subMessage.length()) * secondPerCharacter);
  89     // FIXME: We should invoke checkAnchorStatus actively when layout, scroll,
  90     // or page scale change happen.
  91     m_timer.startRepeating(statusCheckInterval, FROM_HERE);
  92 }
  93
  94 void ValidationMessageClientImpl::hideValidationMessage(const Element& anchor)
  95 {
  96     if (!m_currentAnchor || !isValidationMessageVisible(anchor))
  97         return;
  98     m_timer.stop();
  99     m_currentAnchor = nullptr;
 100     m_message = String();
 101     m_finishTime = 0;
 102     m_webView.client()->hideValidationMessage();
 103 }
 104
 105 bool ValidationMessageClientImpl::isValidationMessageVisible(const Element& anchor)
 106 {
 107     return m_currentAnchor == &anchor;
 108 }
 109
 110 void ValidationMessageClientImpl::documentDetached(const Document& document)
 111 {
 112     if (m_currentAnchor && m_currentAnchor->document() == document)
 113         hideValidationMessage(*m_currentAnchor);
 114 }
 115
 116 void ValidationMessageClientImpl::checkAnchorStatus(Timer<ValidationMessageClientImpl>*)
 117 {
 118     ASSERT(m_currentAnchor);
 119     if (monotonicallyIncreasingTime() >= m_finishTime || !currentView()) {
 120         hideValidationMessage(*m_currentAnchor);
 121         return;
 122     }
 123
 124     // Check the visibility of the element.
 125     // FIXME: Can we check invisibility by scrollable non-frame elements?
 126     IntRect newAnchorRect = currentView()->contentsToRootView(m_currentAnchor->pixelSnappedBoundingBox());
 127     newAnchorRect = intersection(currentView()->convertToRootView(currentView()->boundsRect()), newAnchorRect);
 128     if (newAnchorRect.isEmpty()) {
 129         hideValidationMessage(*m_currentAnchor);
 130         return;
 131     }
 132
 133     IntRect newAnchorRectInScreen = currentView()->hostWindow()->rootViewToScreen(newAnchorRect);
 134     if (newAnchorRectInScreen == m_lastAnchorRectInScreen && m_webView.pageScaleFactor() == m_lastPageScaleFactor)
 135         return;
 136     m_lastAnchorRectInScreen = newAnchorRectInScreen;
 137     m_lastPageScaleFactor = m_webView.pageScaleFactor();
 138     m_webView.client()->moveValidationMessage(newAnchorRect);
 139 }
 140
 141 void ValidationMessageClientImpl::willBeDestroyed()
 142 {
 143     if (m_currentAnchor)
 144         hideValidationMessage(*m_currentAnchor);
 145 }
 146
 147 void ValidationMessageClientImpl::trace(Visitor* visitor)
 148 {
 149     visitor->trace(m_currentAnchor);
 150     ValidationMessageClient::trace(visitor);
 151 }
 152
 153 } // namespace blink