1 | /* |
2 | * Copyright (C) 2019 Igalia S.L. |
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 | |
28 | #if ENABLE(RESIZE_OBSERVER) |
29 | #include "ResizeObservation.h" |
30 | |
31 | #include "HTMLFrameOwnerElement.h" |
32 | #include "RenderBox.h" |
33 | #include "SVGElement.h" |
34 | |
35 | namespace WebCore { |
36 | |
37 | Ref<ResizeObservation> ResizeObservation::create(Element* target) |
38 | { |
39 | return adoptRef(*new ResizeObservation(target)); |
40 | } |
41 | |
42 | ResizeObservation::ResizeObservation(Element* element) |
43 | : m_target(element) |
44 | { |
45 | } |
46 | |
47 | ResizeObservation::~ResizeObservation() |
48 | { |
49 | } |
50 | |
51 | void ResizeObservation::updateObservationSize(const LayoutSize& size) |
52 | { |
53 | m_lastObservationSize = size; |
54 | } |
55 | |
56 | LayoutSize ResizeObservation::computeObservedSize() const |
57 | { |
58 | if (m_target->isSVGElement()) { |
59 | FloatRect svgRect; |
60 | if (downcast<SVGElement>(*m_target).getBoundingBox(svgRect)) |
61 | return LayoutSize(svgRect.width(), svgRect.height()); |
62 | } |
63 | if (m_target->renderBox()) |
64 | return m_target->renderBox()->contentSize(); |
65 | return LayoutSize(); |
66 | } |
67 | |
68 | LayoutPoint ResizeObservation::computeTargetLocation() const |
69 | { |
70 | if (!m_target->isSVGElement()) { |
71 | if (auto box = m_target->renderBox()) |
72 | return LayoutPoint(box->paddingLeft(), box->paddingTop()); |
73 | } |
74 | |
75 | return { }; |
76 | } |
77 | |
78 | FloatRect ResizeObservation::computeContentRect() const |
79 | { |
80 | return FloatRect(FloatPoint(computeTargetLocation()), FloatSize(m_lastObservationSize)); |
81 | } |
82 | |
83 | bool ResizeObservation::elementSizeChanged(LayoutSize& currentSize) const |
84 | { |
85 | currentSize = computeObservedSize(); |
86 | return m_lastObservationSize != currentSize; |
87 | } |
88 | |
89 | size_t ResizeObservation::targetElementDepth() const |
90 | { |
91 | unsigned depth = 0; |
92 | for (Element* ownerElement = m_target; ownerElement; ownerElement = ownerElement->document().ownerElement()) { |
93 | for (Element* parent = ownerElement; parent; parent = parent->parentElement()) |
94 | ++depth; |
95 | } |
96 | |
97 | return depth; |
98 | } |
99 | |
100 | } // namespace WebCore |
101 | |
102 | #endif // ENABLE(RESIZE_OBSERVER) |
103 | |