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Serenity Operating System
1/*
2 * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this
9 * list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
22 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <AK/FlyString.h>
28#include <AK/Function.h>
29#include <LibJS/Interpreter.h>
30#include <LibJS/Runtime/PrimitiveString.h>
31#include <LibJS/Runtime/Value.h>
32#include <LibWeb/Bindings/CanvasRenderingContext2DWrapper.h>
33#include <LibWeb/Bindings/HTMLCanvasElementWrapper.h>
34#include <LibWeb/DOM/CanvasRenderingContext2D.h>
35#include <LibWeb/DOM/HTMLCanvasElement.h>
36
37namespace Web {
38namespace Bindings {
39
40HTMLCanvasElementWrapper::HTMLCanvasElementWrapper(HTMLCanvasElement& element)
41 : ElementWrapper(element)
42{
43 put_native_function("getContext", get_context, 1);
44
45 put_native_property("width", width_getter, nullptr);
46 put_native_property("height", height_getter, nullptr);
47}
48
49HTMLCanvasElementWrapper::~HTMLCanvasElementWrapper()
50{
51}
52
53HTMLCanvasElement& HTMLCanvasElementWrapper::node()
54{
55 return static_cast<HTMLCanvasElement&>(NodeWrapper::node());
56}
57
58const HTMLCanvasElement& HTMLCanvasElementWrapper::node() const
59{
60 return static_cast<const HTMLCanvasElement&>(NodeWrapper::node());
61}
62
63static HTMLCanvasElement* impl_from(JS::Interpreter& interpreter)
64{
65 auto* this_object = interpreter.this_value().to_object(interpreter.heap());
66 if (!this_object)
67 return nullptr;
68 // FIXME: Verify that it's a HTMLCanvasElementWrapper somehow!
69 return &static_cast<HTMLCanvasElementWrapper*>(this_object)->node();
70}
71
72JS::Value HTMLCanvasElementWrapper::get_context(JS::Interpreter& interpreter)
73{
74 auto* impl = impl_from(interpreter);
75 if (!impl)
76 return {};
77 auto& arguments = interpreter.call_frame().arguments;
78 if (arguments.size() >= 1) {
79 auto* context = impl->get_context(arguments[0].to_string());
80 return wrap(interpreter.heap(), *context);
81 }
82 return JS::js_undefined();
83}
84
85JS::Value HTMLCanvasElementWrapper::width_getter(JS::Interpreter& interpreter)
86{
87 if (auto* impl = impl_from(interpreter))
88 return JS::Value(impl->preferred_width());
89 return {};
90}
91
92JS::Value HTMLCanvasElementWrapper::height_getter(JS::Interpreter& interpreter)
93{
94 if (auto* impl = impl_from(interpreter))
95 return JS::Value(impl->preferred_height());
96 return {};
97}
98
99}
100}