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1/*
2 * Copyright (C) 2007, 2008 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 *
8 * 1.  Redistributions of source code must retain the above copyright
9 *     notice, this list of conditions and the following disclaimer.
10 * 2.  Redistributions in binary form must reproduce the above copyright
11 *     notice, this list of conditions and the following disclaimer in the
12 *     documentation and/or other materials provided with the distribution.
13 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
14 *     its contributors may be used to endorse or promote products derived
15 *     from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29WebInspector.FontView = function(resource)
30{
31    WebInspector.ResourceView.call(this, resource);
32
33    this.element.addStyleClass("font");
34}
35
36WebInspector.FontView._fontInnerHTML = "ABCDEFGHIJKLM<br>NOPQRSTUVWXYZ<br>abcdefghijklm<br>nopqrstuvwxyz<br>1234567890";
37
38WebInspector.FontView._fontId = 0;
39
40WebInspector.FontView._measureFontSize = 50;
41
42WebInspector.FontView.prototype = {
43    hasContent: function()
44    {
45        return true;
46    },
47
48    _createContentIfNeeded: function()
49    {
50        if (this.fontPreviewElement)
51            return;
52
53        var uniqueFontName = "WebInspectorFontPreview" + (++WebInspector.FontView._fontId);
54
55        this.fontStyleElement = document.createElement("style");
56        this.fontStyleElement.textContent = "@font-face { font-family: \"" + uniqueFontName + "\"; src: url(" + this.resource.url + "); }";
57        document.head.appendChild(this.fontStyleElement);
58
59        this.fontPreviewElement = document.createElement("div");
60        this.fontPreviewElement.innerHTML = WebInspector.FontView._fontInnerHTML;
61        this.fontPreviewElement.style.setProperty("font-family", uniqueFontName, null);
62        this.fontPreviewElement.style.setProperty("visibility", "hidden", null);
63
64        this._dummyElement = document.createElement("div");
65        this._dummyElement.style.visibility = "hidden";
66        this._dummyElement.style.zIndex = "-1";
67        this._dummyElement.style.display = "inline";
68        this._dummyElement.style.position = "absolute";
69        this._dummyElement.style.setProperty("font-family", uniqueFontName, null);
70        this._dummyElement.style.setProperty("font-size", WebInspector.FontView._measureFontSize + "px", null);
71        this._dummyElement.innerHTML = WebInspector.FontView._fontInnerHTML;
72
73        this.element.appendChild(this.fontPreviewElement);
74    },
75
76    show: function(parentElement)
77    {
78        WebInspector.ResourceView.prototype.show.call(this, parentElement);
79        this._createContentIfNeeded();
80
81        this.updateFontPreviewSize();
82    },
83
84    resize: function()
85    {
86        if (this._inResize)
87            return;
88
89        this._inResize = true;
90        try {
91            this.updateFontPreviewSize();
92        } finally {
93            delete this._inResize;
94        }
95    },
96
97    _measureElement: function()
98    {
99        this.element.appendChild(this._dummyElement);
100        var result = { width: this._dummyElement.offsetWidth, height: this._dummyElement.offsetHeight };
101        this.element.removeChild(this._dummyElement);
102
103        return result;
104    },
105
106    updateFontPreviewSize: function()
107    {
108        if (!this.fontPreviewElement || !this.visible)
109            return;
110
111        this.fontPreviewElement.style.removeProperty("visibility");
112        var dimension = this._measureElement();
113
114        const height = dimension.height;
115        const width = dimension.width;
116
117        // Subtract some padding. This should match the paddings in the CSS plus room for the scrollbar.
118        const containerWidth = this.element.offsetWidth - 50;
119        const containerHeight = this.element.offsetHeight - 30;
120
121        if (!height || !width || !containerWidth || !containerHeight) {
122            this.fontPreviewElement.style.removeProperty("font-size");
123            return;
124        }
125
126        var widthRatio = containerWidth / width;
127        var heightRatio = containerHeight / height;
128        var finalFontSize = Math.floor(WebInspector.FontView._measureFontSize * Math.min(widthRatio, heightRatio)) - 2;
129
130        this.fontPreviewElement.style.setProperty("font-size", finalFontSize + "px", null);
131    }
132}
133
134WebInspector.FontView.prototype.__proto__ = WebInspector.ResourceView.prototype;
135