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#if ENABLE(INPUT_SPEECH)
33#include "RenderInputSpeech.h"
34
35#include "GraphicsContext.h"
36#include "HTMLNames.h"
37#include "PaintInfo.h"
38#include "RenderBox.h"
39#include "TextControlInnerElements.h"
40
41namespace WebCore {
42
43static const float defaultControlFontPixelSize = 13;
44static const float defaultSpeechButtonSize = 16;
45static const float minSpeechButtonSize = 8;
46static const float maxSpeechButtonSize = 40;
47
48void RenderInputSpeech::adjustInputFieldSpeechButtonStyle(StyleResolver*, RenderStyle* style, Element*)
49{
50    // Scale the button size based on the font size.
51    float fontScale = style->fontSize() / defaultControlFontPixelSize;
52    int speechButtonSize = lroundf(std::min(std::max(minSpeechButtonSize, defaultSpeechButtonSize * fontScale), maxSpeechButtonSize));
53    style->setWidth(Length(speechButtonSize, Fixed));
54    style->setHeight(Length(speechButtonSize, Fixed));
55}
56
57bool RenderInputSpeech::paintInputFieldSpeechButton(RenderObject* object, const PaintInfo& paintInfo, const IntRect& rect)
58{
59    Element* element = object->node()->isElementNode() ? toElement(object->node()) : 0;
60    if (!element || !element->isInputFieldSpeechButtonElement())
61        return false;
62
63    // Get the renderer of <input> element.
64    Node* input = object->node()->shadowHost();
65    if (!input->renderer()->isBox())
66        return false;
67    RenderBox* inputRenderBox = toRenderBox(input->renderer());
68    LayoutRect inputContentBox = inputRenderBox->contentBoxRect();
69
70    // Make sure the scaled button stays square and will fit in its parent's box.
71    LayoutUnit buttonSize = std::min(inputContentBox.width(), std::min<LayoutUnit>(inputContentBox.height(), rect.height()));
72    // Calculate button's coordinates relative to the input element.
73    // Center the button vertically.  Round up though, so if it has to be one pixel off-center, it will
74    // be one pixel closer to the bottom of the field.  This tends to look better with the text.
75    LayoutRect buttonRect(object->offsetFromAncestorContainer(inputRenderBox).width(),
76                          inputContentBox.y() + (inputContentBox.height() - buttonSize + 1) / 2,
77                          buttonSize, buttonSize);
78
79    // Compute an offset between the part renderer and the input renderer.
80    LayoutSize offsetFromInputRenderer = -(object->offsetFromAncestorContainer(inputRenderBox));
81    // Move the rect into partRenderer's coords.
82    buttonRect.move(offsetFromInputRenderer);
83    // Account for the local drawing offset.
84    buttonRect.moveBy(rect.location());
85
86    DEPRECATED_DEFINE_STATIC_LOCAL(RefPtr<Image>, imageStateNormal, (Image::loadPlatformResource("inputSpeech")));
87    DEPRECATED_DEFINE_STATIC_LOCAL(RefPtr<Image>, imageStateRecording, (Image::loadPlatformResource("inputSpeechRecording")));
88    DEPRECATED_DEFINE_STATIC_LOCAL(RefPtr<Image>, imageStateWaiting, (Image::loadPlatformResource("inputSpeechWaiting")));
89
90    InputFieldSpeechButtonElement* speechButton = toInputFieldSpeechButtonElement(element);
91    Image* image = imageStateNormal.get();
92    if (speechButton->state() == InputFieldSpeechButtonElement::Recording)
93        image = imageStateRecording.get();
94    else if (speechButton->state() == InputFieldSpeechButtonElement::Recognizing)
95        image = imageStateWaiting.get();
96    paintInfo.context->drawImage(image, object->style().colorSpace(), pixelSnappedIntRect(buttonRect));
97
98    return false;
99}
100
101} // namespace WebCore
102
103#endif // ENABLE(INPUT_SPEECH)
104