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authorWu Cheng-Han2015-05-04 15:53:29 +0800
committerWu Cheng-Han2015-05-04 15:53:29 +0800
commit4b0ca55eb79e963523eb6c8197825e9e8ae904e2 (patch)
tree574f3923af77b37b41dbf1b00bcd7827ef724a28 /public/vendor/codemirror/addon/search/match-highlighter.js
parent61eb11d23c65c9e5c493c67d055f785cbec139e2 (diff)
First commit, version 0.2.7
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+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: http://codemirror.net/LICENSE
+
+// Highlighting text that matches the selection
+//
+// Defines an option highlightSelectionMatches, which, when enabled,
+// will style strings that match the selection throughout the
+// document.
+//
+// The option can be set to true to simply enable it, or to a
+// {minChars, style, wordsOnly, showToken, delay} object to explicitly
+// configure it. minChars is the minimum amount of characters that should be
+// selected for the behavior to occur, and style is the token style to
+// apply to the matches. This will be prefixed by "cm-" to create an
+// actual CSS class name. If wordsOnly is enabled, the matches will be
+// highlighted only if the selected text is a word. showToken, when enabled,
+// will cause the current token to be highlighted when nothing is selected.
+// delay is used to specify how much time to wait, in milliseconds, before
+// highlighting the matches.
+
+(function(mod) {
+ if (typeof exports == "object" && typeof module == "object") // CommonJS
+ mod(require("../../lib/codemirror"));
+ else if (typeof define == "function" && define.amd) // AMD
+ define(["../../lib/codemirror"], mod);
+ else // Plain browser env
+ mod(CodeMirror);
+})(function(CodeMirror) {
+ "use strict";
+
+ var DEFAULT_MIN_CHARS = 2;
+ var DEFAULT_TOKEN_STYLE = "matchhighlight";
+ var DEFAULT_DELAY = 100;
+ var DEFAULT_WORDS_ONLY = false;
+
+ function State(options) {
+ if (typeof options == "object") {
+ this.minChars = options.minChars;
+ this.style = options.style;
+ this.showToken = options.showToken;
+ this.delay = options.delay;
+ this.wordsOnly = options.wordsOnly;
+ }
+ if (this.style == null) this.style = DEFAULT_TOKEN_STYLE;
+ if (this.minChars == null) this.minChars = DEFAULT_MIN_CHARS;
+ if (this.delay == null) this.delay = DEFAULT_DELAY;
+ if (this.wordsOnly == null) this.wordsOnly = DEFAULT_WORDS_ONLY;
+ this.overlay = this.timeout = null;
+ }
+
+ CodeMirror.defineOption("highlightSelectionMatches", false, function(cm, val, old) {
+ if (old && old != CodeMirror.Init) {
+ var over = cm.state.matchHighlighter.overlay;
+ if (over) cm.removeOverlay(over);
+ clearTimeout(cm.state.matchHighlighter.timeout);
+ cm.state.matchHighlighter = null;
+ cm.off("cursorActivity", cursorActivity);
+ }
+ if (val) {
+ cm.state.matchHighlighter = new State(val);
+ highlightMatches(cm);
+ cm.on("cursorActivity", cursorActivity);
+ }
+ });
+
+ function cursorActivity(cm) {
+ var state = cm.state.matchHighlighter;
+ clearTimeout(state.timeout);
+ state.timeout = setTimeout(function() {highlightMatches(cm);}, state.delay);
+ }
+
+ function highlightMatches(cm) {
+ cm.operation(function() {
+ var state = cm.state.matchHighlighter;
+ if (state.overlay) {
+ cm.removeOverlay(state.overlay);
+ state.overlay = null;
+ }
+ if (!cm.somethingSelected() && state.showToken) {
+ var re = state.showToken === true ? /[\w$]/ : state.showToken;
+ var cur = cm.getCursor(), line = cm.getLine(cur.line), start = cur.ch, end = start;
+ while (start && re.test(line.charAt(start - 1))) --start;
+ while (end < line.length && re.test(line.charAt(end))) ++end;
+ if (start < end)
+ cm.addOverlay(state.overlay = makeOverlay(line.slice(start, end), re, state.style));
+ return;
+ }
+ var from = cm.getCursor("from"), to = cm.getCursor("to");
+ if (from.line != to.line) return;
+ if (state.wordsOnly && !isWord(cm, from, to)) return;
+ var selection = cm.getRange(from, to).replace(/^\s+|\s+$/g, "");
+ if (selection.length >= state.minChars)
+ cm.addOverlay(state.overlay = makeOverlay(selection, false, state.style));
+ });
+ }
+
+ function isWord(cm, from, to) {
+ var str = cm.getRange(from, to);
+ if (str.match(/^\w+$/) !== null) {
+ if (from.ch > 0) {
+ var pos = {line: from.line, ch: from.ch - 1};
+ var chr = cm.getRange(pos, from);
+ if (chr.match(/\W/) === null) return false;
+ }
+ if (to.ch < cm.getLine(from.line).length) {
+ var pos = {line: to.line, ch: to.ch + 1};
+ var chr = cm.getRange(to, pos);
+ if (chr.match(/\W/) === null) return false;
+ }
+ return true;
+ } else return false;
+ }
+
+ function boundariesAround(stream, re) {
+ return (!stream.start || !re.test(stream.string.charAt(stream.start - 1))) &&
+ (stream.pos == stream.string.length || !re.test(stream.string.charAt(stream.pos)));
+ }
+
+ function makeOverlay(query, hasBoundary, style) {
+ return {token: function(stream) {
+ if (stream.match(query) &&
+ (!hasBoundary || boundariesAround(stream, hasBoundary)))
+ return style;
+ stream.next();
+ stream.skipTo(query.charAt(0)) || stream.skipToEnd();
+ }};
+ }
+});