1/*
2 * Copyright (C) 2006, 2007, 2009 Apple Inc. All rights reserved.
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public License
15 * along with this library; see the file COPYING.LIB.  If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 */
19
20#include "config.h"
21#include "JSCanvasRenderingContext2D.h"
22
23#include "CanvasGradient.h"
24#include "CanvasPattern.h"
25#include "CanvasRenderingContext2D.h"
26#include "CanvasStyle.h"
27#include "ExceptionCode.h"
28#include "HTMLCanvasElement.h"
29#include "HTMLImageElement.h"
30#include "ImageData.h"
31#include "JSCanvasGradient.h"
32#include "JSCanvasPattern.h"
33#include "JSHTMLCanvasElement.h"
34#include "JSHTMLImageElement.h"
35#include "JSImageData.h"
36
37using namespace JSC;
38
39namespace WebCore {
40
41static JSValue toJS(ExecState* exec, JSDOMGlobalObject* globalObject, const CanvasStyle& style)
42{
43    if (style.canvasGradient())
44        return toJS(exec, globalObject, style.canvasGradient());
45    if (style.canvasPattern())
46        return toJS(exec, globalObject, style.canvasPattern());
47    return jsStringWithCache(exec, style.color());
48}
49
50static CanvasStyle toHTMLCanvasStyle(ExecState*, JSValue value)
51{
52    if (!value.isObject())
53        return CanvasStyle();
54    JSObject* object = asObject(value);
55    if (object->inherits(JSCanvasGradient::info()))
56        return CanvasStyle(&jsCast<JSCanvasGradient*>(object)->impl());
57    if (object->inherits(JSCanvasPattern::info()))
58        return CanvasStyle(&jsCast<JSCanvasPattern*>(object)->impl());
59    return CanvasStyle();
60}
61
62JSValue JSCanvasRenderingContext2D::strokeStyle(ExecState* exec) const
63{
64    return toJS(exec, globalObject(), impl().strokeStyle());
65}
66
67void JSCanvasRenderingContext2D::setStrokeStyle(ExecState* exec, JSValue value)
68{
69    CanvasRenderingContext2D& context = impl();
70    if (value.isString()) {
71        context.setStrokeColor(asString(value)->value(exec));
72        return;
73    }
74    context.setStrokeStyle(toHTMLCanvasStyle(exec, value));
75}
76
77JSValue JSCanvasRenderingContext2D::fillStyle(ExecState* exec) const
78{
79    return toJS(exec, globalObject(), impl().fillStyle());
80}
81
82void JSCanvasRenderingContext2D::setFillStyle(ExecState* exec, JSValue value)
83{
84    CanvasRenderingContext2D& context = impl();
85    if (value.isString()) {
86        context.setFillColor(asString(value)->value(exec));
87        return;
88    }
89    context.setFillStyle(toHTMLCanvasStyle(exec, value));
90}
91
92JSValue JSCanvasRenderingContext2D::webkitLineDash(ExecState* exec) const
93{
94    const Vector<float>& dash = impl().getLineDash();
95
96    MarkedArgumentBuffer list;
97    Vector<float>::const_iterator end = dash.end();
98    for (Vector<float>::const_iterator it = dash.begin(); it != end; ++it)
99        list.append(JSValue(*it));
100    return constructArray(exec, 0, globalObject(), list);
101}
102
103void JSCanvasRenderingContext2D::setWebkitLineDash(ExecState* exec, JSValue value)
104{
105    if (!isJSArray(value))
106        return;
107
108    Vector<float> dash;
109    JSArray* valueArray = asArray(value);
110    for (unsigned i = 0; i < valueArray->length(); ++i) {
111        float elem = valueArray->getIndex(exec, i).toFloat(exec);
112        if (elem <= 0 || !std::isfinite(elem))
113            return;
114
115        dash.append(elem);
116    }
117
118    impl().setWebkitLineDash(dash);
119}
120
121} // namespace WebCore
122