1/*
2 * Copyright (C) 2010 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 are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include "config.h"
32#include "ValidationMessage.h"
33
34#include "CSSPropertyNames.h"
35#include "CSSStyleSelector.h"
36#include "CSSValueKeywords.h"
37#include "FormAssociatedElement.h"
38#include "HTMLBRElement.h"
39#include "HTMLNames.h"
40#include "Page.h"
41#include "RenderObject.h"
42#include "Settings.h"
43#include "ShadowRoot.h"
44#include "Text.h"
45#include <wtf/PassOwnPtr.h>
46
47namespace WebCore {
48
49using namespace HTMLNames;
50
51ALWAYS_INLINE ValidationMessage::ValidationMessage(FormAssociatedElement* element)
52    : m_element(element)
53{
54}
55
56ValidationMessage::~ValidationMessage()
57{
58    deleteBubbleTree();
59}
60
61PassOwnPtr<ValidationMessage> ValidationMessage::create(FormAssociatedElement* element)
62{
63    return adoptPtr(new ValidationMessage(element));
64}
65
66void ValidationMessage::setMessage(const String& message)
67{
68    // Don't modify the DOM tree in this context.
69    // If so, an assertion in Node::isFocusable() fails.
70    ASSERT(!message.isEmpty());
71    m_message = message;
72    if (!m_bubble)
73        m_timer.set(new Timer<ValidationMessage>(this, &ValidationMessage::buildBubbleTree));
74    else
75        m_timer.set(new Timer<ValidationMessage>(this, &ValidationMessage::setMessageDOMAndStartTimer));
76    m_timer->startOneShot(0);
77}
78
79void ValidationMessage::setMessageDOMAndStartTimer(Timer<ValidationMessage>*)
80{
81    ASSERT(m_bubbleMessage);
82    m_bubbleMessage->removeAllChildren();
83    Vector<String> lines;
84    m_message.split('\n', lines);
85    Document* doc = m_bubbleMessage->document();
86    ExceptionCode ec = 0;
87    for (unsigned i = 0; i < lines.size(); ++i) {
88        if (i) {
89            m_bubbleMessage->appendChild(HTMLBRElement::create(doc), ec);
90            m_bubbleMessage->appendChild(Text::create(doc, lines[i]), ec);
91        } else {
92            RefPtr<HTMLElement> bold = HTMLElement::create(bTag, doc);
93            bold->setInnerText(lines[i], ec);
94            m_bubbleMessage->appendChild(bold.release(), ec);
95        }
96    }
97
98    int magnification = doc->page() ? doc->page()->settings()->validationMessageTimerMaginification() : -1;
99    if (magnification <= 0)
100        m_timer.clear();
101    else {
102        m_timer.set(new Timer<ValidationMessage>(this, &ValidationMessage::deleteBubbleTree));
103        m_timer->startOneShot(max(5.0, static_cast<double>(m_message.length()) * magnification / 1000));
104    }
105}
106
107class ElementWithPseudoId : public HTMLElement {
108public:
109    static PassRefPtr<HTMLElement> create(Document* doc, const AtomicString& pseudoName)
110    {
111        return adoptRef(new ElementWithPseudoId(doc, pseudoName));
112    }
113
114protected:
115    ElementWithPseudoId(Document* doc, const AtomicString& pseudoName)
116        : HTMLElement(divTag, doc)
117        , m_pseudoName(pseudoName) { };
118    virtual const AtomicString& shadowPseudoId() const { return m_pseudoName; }
119
120private:
121    AtomicString m_pseudoName;
122};
123
124void ValidationMessage::buildBubbleTree(Timer<ValidationMessage>*)
125{
126    HTMLElement* host = toHTMLElement(m_element);
127    Document* doc = host->document();
128    m_bubble = ElementWithPseudoId::create(doc, "-webkit-validation-bubble");
129    // Need to force position:absolute because RenderMenuList doesn't assume it
130    // contains non-absolute or non-fixed renderers as children.
131    m_bubble->getInlineStyleDecl()->setProperty(CSSPropertyPosition, CSSValueAbsolute);
132    ExceptionCode ec = 0;
133    host->ensureShadowRoot()->appendChild(m_bubble.get(), ec);
134
135    RefPtr<HTMLElement> clipper = ElementWithPseudoId::create(doc, "-webkit-validation-bubble-arrow-clipper");
136    clipper->appendChild(ElementWithPseudoId::create(doc, "-webkit-validation-bubble-arrow"), ec);
137    m_bubble->appendChild(clipper.release(), ec);
138    m_bubbleMessage = ElementWithPseudoId::create(doc, "-webkit-validation-bubble-message");
139    m_bubble->appendChild(m_bubbleMessage, ec);
140
141    setMessageDOMAndStartTimer();
142
143    // FIXME: Use transition to show the bubble.
144
145    // We don't need to adjust the bubble location. The default position is enough.
146}
147
148void ValidationMessage::requestToHideMessage()
149{
150    // We must not modify the DOM tree in this context by the same reason as setMessage().
151    m_timer.set(new Timer<ValidationMessage>(this, &ValidationMessage::deleteBubbleTree));
152    m_timer->startOneShot(0);
153}
154
155void ValidationMessage::deleteBubbleTree(Timer<ValidationMessage>*)
156{
157    if (m_bubble) {
158        m_bubbleMessage = 0;
159        HTMLElement* host = toHTMLElement(m_element);
160        ExceptionCode ec;
161        host->shadowRoot()->removeChild(m_bubble.get(), ec);
162        m_bubble = 0;
163    }
164    m_message = String();
165}
166
167} // namespace WebCore
168