1/*
2 * Copyright (C) 2010 Apple 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''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "WebPopupMenu.h"
28
29#include "PlatformPopupMenuData.h"
30#include <WebCore/Font.h>
31#include <WebCore/GraphicsContext.h>
32#include <WebCore/TextRun.h>
33#include <WebCore/PopupMenuClient.h>
34#include <WebCore/PopupMenuStyle.h>
35#include <WebCore/RenderTheme.h>
36
37using namespace WebCore;
38
39namespace WebKit {
40
41static const int separatorPadding = 4;
42static const int separatorHeight = 1;
43static const int popupWindowBorderWidth = 1;
44
45void WebPopupMenu::setUpPlatformData(const WebCore::IntRect& pageCoordinates, PlatformPopupMenuData& data)
46{
47    int itemCount = m_popupClient->listSize();
48
49    data.m_clientPaddingLeft = m_popupClient->clientPaddingLeft();
50    data.m_clientPaddingRight = m_popupClient->clientPaddingRight();
51    data.m_clientInsetLeft = m_popupClient->clientInsetLeft();
52    data.m_clientInsetRight = m_popupClient->clientInsetRight();
53    data.m_itemHeight = m_popupClient->menuStyle().font().fontMetrics().height() + 1;
54
55    int popupWidth = 0;
56    for (size_t i = 0; i < itemCount; ++i) {
57        String text = m_popupClient->itemText(i);
58        if (text.isEmpty())
59            continue;
60
61        Font itemFont = m_popupClient->menuStyle().font();
62        if (m_popupClient->itemIsLabel(i)) {
63            FontDescription d = itemFont.fontDescription();
64            d.setWeight(d.bolderWeight());
65            itemFont = Font(d, itemFont.letterSpacing(), itemFont.wordSpacing());
66            itemFont.update(m_popupClient->fontSelector());
67        }
68
69        popupWidth = std::max<float>(popupWidth, ceilf(itemFont.width(TextRun(text.characters(), text.length()))));
70    }
71
72    // FIXME: popupWidth should probably take into account monitor constraints as is done with WebPopupMenuProxyWin::calculatePositionAndSize.
73
74    popupWidth += max(0, data.m_clientPaddingRight - data.m_clientInsetRight) + max(0, data.m_clientPaddingLeft - data.m_clientInsetLeft);
75    popupWidth += 2 * popupWindowBorderWidth;
76    data.m_popupWidth = popupWidth;
77
78    // The backing stores should be drawn at least as wide as the control on the page to match the width of the popup window we'll create.
79    int backingStoreWidth = max(pageCoordinates.width() - m_popupClient->clientInsetLeft() - m_popupClient->clientInsetRight(), popupWidth);
80
81    IntSize backingStoreSize(backingStoreWidth, (itemCount * data.m_itemHeight));
82    data.m_notSelectedBackingStore = ShareableBitmap::createShareable(backingStoreSize, ShareableBitmap::SupportsAlpha);
83    data.m_selectedBackingStore = ShareableBitmap::createShareable(backingStoreSize, ShareableBitmap::SupportsAlpha);
84
85    OwnPtr<GraphicsContext> notSelectedBackingStoreContext = data.m_notSelectedBackingStore->createGraphicsContext();
86    OwnPtr<GraphicsContext> selectedBackingStoreContext = data.m_selectedBackingStore->createGraphicsContext();
87
88    Color activeOptionBackgroundColor = RenderTheme::defaultTheme()->activeListBoxSelectionBackgroundColor();
89    Color activeOptionTextColor = RenderTheme::defaultTheme()->activeListBoxSelectionForegroundColor();
90
91    for (int y = 0; y < backingStoreSize.height(); y += data.m_itemHeight) {
92        int index = y / data.m_itemHeight;
93
94        PopupMenuStyle itemStyle = m_popupClient->itemStyle(index);
95
96        Color optionBackgroundColor = itemStyle.backgroundColor();
97        Color optionTextColor = itemStyle.foregroundColor();
98
99        IntRect itemRect(0, y, backingStoreWidth, data.m_itemHeight);
100
101        // Draw the background for this menu item
102        if (itemStyle.isVisible()) {
103            notSelectedBackingStoreContext->fillRect(itemRect, optionBackgroundColor, ColorSpaceDeviceRGB);
104            selectedBackingStoreContext->fillRect(itemRect, activeOptionBackgroundColor, ColorSpaceDeviceRGB);
105        }
106
107        if (m_popupClient->itemIsSeparator(index)) {
108            IntRect separatorRect(itemRect.x() + separatorPadding, itemRect.y() + (itemRect.height() - separatorHeight) / 2, itemRect.width() - 2 * separatorPadding, separatorHeight);
109
110            notSelectedBackingStoreContext->fillRect(separatorRect, optionTextColor, ColorSpaceDeviceRGB);
111            selectedBackingStoreContext->fillRect(separatorRect, activeOptionTextColor, ColorSpaceDeviceRGB);
112            continue;
113        }
114
115        String itemText = m_popupClient->itemText(index);
116
117        unsigned length = itemText.length();
118        const UChar* string = itemText.characters();
119        TextRun textRun(string, length, false, 0, 0, TextRun::AllowTrailingExpansion, itemText.defaultWritingDirection() == WTF::Unicode::RightToLeft);
120
121        notSelectedBackingStoreContext->setFillColor(optionTextColor, ColorSpaceDeviceRGB);
122        selectedBackingStoreContext->setFillColor(activeOptionTextColor, ColorSpaceDeviceRGB);
123
124        Font itemFont = m_popupClient->menuStyle().font();
125        if (m_popupClient->itemIsLabel(index)) {
126            FontDescription d = itemFont.fontDescription();
127            d.setWeight(d.bolderWeight());
128            itemFont = Font(d, itemFont.letterSpacing(), itemFont.wordSpacing());
129            itemFont.update(m_popupClient->fontSelector());
130        }
131
132        // Draw the item text
133        if (itemStyle.isVisible()) {
134            int textX = std::max(0, data.m_clientPaddingLeft - data.m_clientInsetLeft);
135            if (RenderTheme::defaultTheme()->popupOptionSupportsTextIndent() && itemStyle.textDirection() == LTR)
136                textX += itemStyle.textIndent().calcMinValue(itemRect.width());
137            int textY = itemRect.y() + itemFont.fontMetrics().ascent() + (itemRect.height() - itemFont.fontMetrics().height()) / 2;
138
139            notSelectedBackingStoreContext->drawBidiText(itemFont, textRun, IntPoint(textX, textY));
140            selectedBackingStoreContext->drawBidiText(itemFont, textRun, IntPoint(textX, textY));
141        }
142    }
143}
144
145} // namespace WebKit
146