]>
Commit | Line | Data |
---|---|---|
1 | class Editor { | |
2 | constructor(parent) { | |
3 | this.parent = $(parent); | |
4 | ||
5 | // Get the textarea | |
6 | this.textarea = this.parent.find("textarea"); | |
7 | ||
8 | // Make the textarea magic | |
9 | this.activateTextArea(); | |
10 | ||
11 | // Bind all keys | |
12 | this.bindKeys(); | |
13 | ||
14 | console.log("Editor initialised for " + this.parent); | |
15 | } | |
16 | ||
17 | activateTextArea() { | |
18 | var editor = this; | |
19 | ||
20 | // Remember any selected text | |
21 | this.textarea.on("select keyup click", function(e) { | |
22 | // Ignore any keyboard shortcuts | |
23 | if (e.ctrlKey) | |
24 | return; | |
25 | ||
26 | // Save selected text | |
27 | editor.selection = { | |
28 | start : this.selectionStart, | |
29 | end : this.selectionEnd, | |
30 | text : this.value.slice(this.selectionStart, this.selectionEnd), | |
31 | length: this.selectionEnd - this.selectionStart, | |
32 | }; | |
33 | ||
34 | console.debug("Something got selected:"); | |
35 | console.debug(editor.selection); | |
36 | }) | |
37 | ||
38 | // Bind keyboard shortcuts | |
39 | this.textarea.on("keyup", function(e) { | |
40 | // If Ctrl wasn't pressed this isn't for us | |
41 | if (!e.ctrlKey) | |
42 | return; | |
43 | ||
44 | switch (e.which) { | |
45 | // B - Bold | |
46 | case 66: | |
47 | editor.bold(); | |
48 | break; | |
49 | ||
50 | // I - Italic | |
51 | case 73: | |
52 | editor.italic(); | |
53 | break; | |
54 | ||
55 | // H - Headline | |
56 | case 72: | |
57 | editor.headline(); | |
58 | break; | |
59 | } | |
60 | }); | |
61 | } | |
62 | ||
63 | bindKeys() { | |
64 | // Typography | |
65 | this.parent.find("#bold").click(this.bold.bind(this)); | |
66 | this.parent.find("#italic").click(this.italic.bind(this)); | |
67 | ||
68 | // Headlines | |
69 | this.parent.find("#headline").click(this.headline.bind(this)); | |
70 | this.parent.find("#headline-down").click(this.headline_down.bind(this)); | |
71 | this.parent.find("#headline-up").click(this.headline_up.bind(this)); | |
72 | } | |
73 | ||
74 | // Functions to modify the text | |
75 | ||
76 | replaceSelection(replacement) { | |
77 | // Get the DOM element | |
78 | var textarea = this.textarea.get(0); | |
79 | ||
80 | // Write text to textarea and move the cursor to the end | |
81 | textarea.setRangeText(replacement, | |
82 | this.selection.start, this.selection.end, "end"); | |
83 | } | |
84 | ||
85 | insertAtCursor(insertion) { | |
86 | this.replaceSelection(insertion); | |
87 | } | |
88 | ||
89 | bold() { | |
90 | console.debug("Converting into bold: " + this.selection.text); | |
91 | this.replaceSelection("**" + this.selection.text + "**"); | |
92 | } | |
93 | ||
94 | italic() { | |
95 | console.debug("Converting into italic: " + this.selection.text); | |
96 | this.replaceSelection("*" + this.selection.text + "*"); | |
97 | } | |
98 | ||
99 | // Headlines | |
100 | ||
101 | findLevel() { | |
102 | // Get all text between start and cursor position | |
103 | var text = this.textarea.val().slice(0, this.selection.start); | |
104 | ||
105 | // Split it in lines and reverse | |
106 | var lines = text.split("\n"); | |
107 | lines.reverse(); | |
108 | ||
109 | for (var line of lines) { | |
110 | console.debug(line); | |
111 | ||
112 | // Return the number of # found in the nearest headline | |
113 | var match = line.match("^(#+)"); | |
114 | if (match) { | |
115 | return match[1].length; | |
116 | } | |
117 | } | |
118 | ||
119 | // If nothing was found, we are on level one | |
120 | return 1; | |
121 | } | |
122 | ||
123 | insertHeadline(offset) { | |
124 | // Find level of headlines | |
125 | var level = Math.max(this.findLevel() + offset, 1); | |
126 | ||
127 | console.debug("Adding headline (" + level + ")"); | |
128 | var headline = "#".repeat(level); | |
129 | ||
130 | if (this.selection.length == 0) { | |
131 | headline += " ..."; | |
132 | } else { | |
133 | // Add some space if we don't have any, yet | |
134 | if (!this.selection.text.startsWith(" ")) | |
135 | headline += " "; | |
136 | ||
137 | headline += this.selection.text + "\n\n"; | |
138 | } | |
139 | ||
140 | this.replaceSelection(headline); | |
141 | } | |
142 | ||
143 | headline() { | |
144 | return this.insertHeadline(0); | |
145 | } | |
146 | ||
147 | headline_down() { | |
148 | return this.insertHeadline(1); | |
149 | } | |
150 | ||
151 | headline_up() { | |
152 | return this.insertHeadline(-1); | |
153 | } | |
154 | } | |
155 | ||
156 | $(document).ready(function() { | |
157 | // Initialise all editors | |
158 | $(".editor").each(function(i, e) { | |
159 | new Editor(e); | |
160 | }); | |
161 | }); |