1 /*
2 * Copyright 2007, The Android Open Source Project
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 * * Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * * 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 THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25 #define LOG_TAG "WebCore"
26
27 #include "config.h"
28 #include "ScrollView.h"
29
30 #include "FloatRect.h"
31 #include "FrameView.h"
32 #include "IntRect.h"
33 #include "PlatformBridge.h"
34 #include "SkRegion.h"
35 #include "WebCoreFrameBridge.h"
36 #include "WebCoreViewBridge.h"
37 #include "WebViewCore.h"
38
39 /*
40 This class implementation does NOT actually emulate the Qt ScrollView.
41 It does provide an implementation that khtml will use to interact with
42 WebKit's WebFrameView documentView and our NSScrollView subclass.
43
44 ScrollView's view is a NSScrollView (or subclass of NSScrollView)
45 in most cases. That scrollview is a subview of an
46 WebCoreFrameView. The WebCoreFrameView's documentView will also be
47 the scroll view's documentView.
48
49 The WebCoreFrameView's size is the frame size. The WebCoreFrameView's documentView
50 corresponds to the frame content size. The scrollview itself is autosized to the
51 WebCoreFrameView's size (see Widget::resize).
52 */
53
54 namespace WebCore {
55
platformVisibleContentRect(bool includeScrollbars) const56 IntRect ScrollView::platformVisibleContentRect(bool includeScrollbars) const
57 {
58 // iframe's visible content rect is relative to its parent, not the viewport.
59 // As we auto expand the iframe, the frame rect is the content rect.
60 if (parent())
61 return IntRect(0, 0, width(), height());
62 else
63 return platformWidget()->getVisibleBounds();
64 }
65
platformContentsSize() const66 IntSize ScrollView::platformContentsSize() const
67 {
68 return m_contentsSize;
69 }
70
platformActualWidth() const71 int ScrollView::platformActualWidth() const
72 {
73 if (parent())
74 return width();
75 return platformWidget()->visibleWidth();
76 }
77
platformActualHeight() const78 int ScrollView::platformActualHeight() const
79 {
80 if (parent())
81 return height();
82 return platformWidget()->visibleHeight();
83 }
84
platformActualScrollX() const85 int ScrollView::platformActualScrollX() const
86 {
87 if (parent())
88 return scrollX();
89 return platformWidget()->visibleX();
90 }
91
platformActualScrollY() const92 int ScrollView::platformActualScrollY() const
93 {
94 if (parent())
95 return scrollY();
96 return platformWidget()->visibleY();
97 }
98
platformSetScrollPosition(const WebCore::IntPoint & pt)99 void ScrollView::platformSetScrollPosition(const WebCore::IntPoint& pt)
100 {
101 PlatformBridge::setScrollPosition(this, m_scrollOrigin.x() + pt.x(),
102 m_scrollOrigin.y() + pt.y());
103 }
104
platformSetScrollbarModes()105 void ScrollView::platformSetScrollbarModes()
106 {
107 if (parent()) // no scrollbar for the subframes
108 return;
109 android::WebViewCore::getWebViewCore(this)->setScrollbarModes(m_horizontalScrollbarMode, m_verticalScrollbarMode);
110 }
111
platformScrollbarModes(ScrollbarMode & h,ScrollbarMode & v) const112 void ScrollView::platformScrollbarModes(ScrollbarMode& h, ScrollbarMode& v) const
113 {
114 // m_horizontalScrollbarMode and m_verticalScrollbarMode are set in ScrollView::setScrollbarModes()
115 h = m_horizontalScrollbarMode;
116 v = m_verticalScrollbarMode;
117 }
118
platformRepaintContentRectangle(const IntRect & rect,bool now)119 void ScrollView::platformRepaintContentRectangle(const IntRect &rect, bool now)
120 {
121 IntRect offsetRect = rect;
122 offsetRect.move(m_scrollOrigin.x(), m_scrollOrigin.y());
123 android::WebViewCore::getWebViewCore(this)->contentInvalidate(offsetRect);
124 }
125
126 #ifdef ANDROID_CAPTURE_OFFSCREEN_PAINTS
127 // Compute the offscreen parts of the drawn rectangle by subtracting
128 // vis from rect. This can compute up to four rectangular slices.
platformOffscreenContentRectangle(const IntRect & vis,const IntRect & rect)129 void ScrollView::platformOffscreenContentRectangle(const IntRect& vis, const IntRect& rect)
130 {
131 android::WebViewCore* core = android::WebViewCore::getWebViewCore(this);
132 if (!core) // SVG does not instantiate webviewcore
133 return; // and doesn't need to record drawing offscreen
134 core->offInvalidate(rect);
135 }
136 #endif
137
platformIsOffscreen() const138 bool ScrollView::platformIsOffscreen() const
139 {
140 /* other platforms override platformIsOffscreen when the browser
141 window is no longer on screen. We override it to prevent gif
142 animations from queuing up subsequent frames during dragging. */
143 return android::WebViewCore::getWebViewCore(this)->drawIsPaused();
144 }
145
146 } // namespace WebCore
147