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 87 m_finishTime = monotonicallyIncreasingTime() + std::max(minimumSecondToShowValidationMessage, (message.length() + subMessage.length()) * secondPerCharacter); 88 // FIXME: We should invoke checkAnchorStatus actively when layout, scroll, 89 // or page scale change happen. 90 m_timer.startRepeating(statusCheckInterval, FROM_HERE); 91 } 92 93 void ValidationMessageClientImpl::hideValidationMessage(const Element& anchor) 94 { 95 if (!m_currentAnchor || !isValidationMessageVisible(anchor)) 96 return; 97 m_timer.stop(); 98 m_currentAnchor = nullptr; 99 m_message = String(); 100 m_finishTime = 0; 101 m_webView.client()->hideValidationMessage(); 102 } 103 104 bool ValidationMessageClientImpl::isValidationMessageVisible(const Element& anchor) 105 { 106 return m_currentAnchor == &anchor; 107 } 108 109 void ValidationMessageClientImpl::documentDetached(const Document& document) 110 { 111 if (m_currentAnchor && m_currentAnchor->document() == document) 112 hideValidationMessage(*m_currentAnchor); 113 } 114 115 void ValidationMessageClientImpl::checkAnchorStatus(Timer<ValidationMessageClientImpl>*) 116 { 117 ASSERT(m_currentAnchor); 118 if (monotonicallyIncreasingTime() >= m_finishTime || !currentView()) { 119 hideValidationMessage(*m_currentAnchor); 120 return; 121 } 122 123 // Check the visibility of the element. 124 // FIXME: Can we check invisibility by scrollable non-frame elements? 125 IntRect newAnchorRect = currentView()->contentsToRootView(m_currentAnchor->pixelSnappedBoundingBox()); 126 newAnchorRect = intersection(currentView()->convertToContainingWindow(currentView()->boundsRect()), newAnchorRect); 127 if (newAnchorRect.isEmpty()) { 128 hideValidationMessage(*m_currentAnchor); 129 return; 130 } 131 132 IntRect newAnchorRectInScreen = currentView()->hostWindow()->rootViewToScreen(newAnchorRect); 133 if (newAnchorRectInScreen == m_lastAnchorRectInScreen && m_webView.pageScaleFactor() == m_lastPageScaleFactor) 134 return; 135 m_lastAnchorRectInScreen = newAnchorRectInScreen; 136 m_lastPageScaleFactor = m_webView.pageScaleFactor(); 137 m_webView.client()->moveValidationMessage(newAnchorRect); 138 } 139 140 void ValidationMessageClientImpl::willBeDestroyed() 141 { 142 if (m_currentAnchor) 143 hideValidationMessage(*m_currentAnchor); 144 } 145 146 void ValidationMessageClientImpl::trace(Visitor* visitor) 147 { 148 visitor->trace(m_currentAnchor); 149 ValidationMessageClient::trace(visitor); 150 } 151 152 } // namespace blink 153