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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
29/**
30 * @extends {WebInspector.ResourceView}
31 * @constructor
32 */
33WebInspector.FontView = function(resource)
34{
35    WebInspector.ResourceView.call(this, resource);
36
37    this.element.classList.add("font");
38}
39
40WebInspector.FontView._fontPreviewLines = [ "ABCDEFGHIJKLM", "NOPQRSTUVWXYZ", "abcdefghijklm", "nopqrstuvwxyz", "1234567890" ];
41
42WebInspector.FontView._fontId = 0;
43
44WebInspector.FontView._measureFontSize = 50;
45
46WebInspector.FontView.prototype = {
47    hasContent: function()
48    {
49        return true;
50    },
51
52    _createContentIfNeeded: function()
53    {
54        if (this.fontPreviewElement)
55            return;
56
57        var uniqueFontName = "WebInspectorFontPreview" + (++WebInspector.FontView._fontId);
58
59        this.fontStyleElement = document.createElement("style");
60        this.fontStyleElement.textContent = "@font-face { font-family: \"" + uniqueFontName + "\"; src: url(" + this.resource.url + "); }";
61        document.head.appendChild(this.fontStyleElement);
62
63        var fontPreview = document.createElement("div");
64        for (var i = 0; i < WebInspector.FontView._fontPreviewLines.length; ++i) {
65            if (i > 0)
66                fontPreview.appendChild(document.createElement("br"));
67            fontPreview.appendChild(document.createTextNode(WebInspector.FontView._fontPreviewLines[i]));
68        }
69        this.fontPreviewElement = fontPreview.cloneNode(true);
70        this.fontPreviewElement.style.setProperty("font-family", uniqueFontName);
71        this.fontPreviewElement.style.setProperty("visibility", "hidden");
72
73        this._dummyElement = fontPreview;
74        this._dummyElement.style.visibility = "hidden";
75        this._dummyElement.style.zIndex = "-1";
76        this._dummyElement.style.display = "inline";
77        this._dummyElement.style.position = "absolute";
78        this._dummyElement.style.setProperty("font-family", uniqueFontName);
79        this._dummyElement.style.setProperty("font-size", WebInspector.FontView._measureFontSize + "px");
80
81        this.element.appendChild(this.fontPreviewElement);
82    },
83
84    wasShown: function()
85    {
86        this._createContentIfNeeded();
87
88        this.updateFontPreviewSize();
89    },
90
91    onResize: function()
92    {
93        if (this._inResize)
94            return;
95
96        this._inResize = true;
97        try {
98            this.updateFontPreviewSize();
99        } finally {
100            delete this._inResize;
101        }
102    },
103
104    _measureElement: function()
105    {
106        this.element.appendChild(this._dummyElement);
107        var result = { width: this._dummyElement.offsetWidth, height: this._dummyElement.offsetHeight };
108        this.element.removeChild(this._dummyElement);
109
110        return result;
111    },
112
113    updateFontPreviewSize: function()
114    {
115        if (!this.fontPreviewElement || !this.isShowing())
116            return;
117
118        this.fontPreviewElement.style.removeProperty("visibility");
119        var dimension = this._measureElement();
120
121        const height = dimension.height;
122        const width = dimension.width;
123
124        // Subtract some padding. This should match the paddings in the CSS plus room for the scrollbar.
125        const containerWidth = this.element.offsetWidth - 50;
126        const containerHeight = this.element.offsetHeight - 30;
127
128        if (!height || !width || !containerWidth || !containerHeight) {
129            this.fontPreviewElement.style.removeProperty("font-size");
130            return;
131        }
132
133        var widthRatio = containerWidth / width;
134        var heightRatio = containerHeight / height;
135        var finalFontSize = Math.floor(WebInspector.FontView._measureFontSize * Math.min(widthRatio, heightRatio)) - 2;
136
137        this.fontPreviewElement.style.setProperty("font-size", finalFontSize + "px", null);
138    },
139
140    __proto__: WebInspector.ResourceView.prototype
141}
142