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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/selection/mark-selection.js
parent61eb11d23c65c9e5c493c67d055f785cbec139e2 (diff)
First commit, version 0.2.7
Diffstat (limited to '')
-rwxr-xr-xpublic/vendor/codemirror/addon/selection/mark-selection.js118
1 files changed, 118 insertions, 0 deletions
diff --git a/public/vendor/codemirror/addon/selection/mark-selection.js b/public/vendor/codemirror/addon/selection/mark-selection.js
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+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: http://codemirror.net/LICENSE
+
+// Because sometimes you need to mark the selected *text*.
+//
+// Adds an option 'styleSelectedText' which, when enabled, gives
+// selected text the CSS class given as option value, or
+// "CodeMirror-selectedtext" when the value is not a string.
+
+(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";
+
+ CodeMirror.defineOption("styleSelectedText", false, function(cm, val, old) {
+ var prev = old && old != CodeMirror.Init;
+ if (val && !prev) {
+ cm.state.markedSelection = [];
+ cm.state.markedSelectionStyle = typeof val == "string" ? val : "CodeMirror-selectedtext";
+ reset(cm);
+ cm.on("cursorActivity", onCursorActivity);
+ cm.on("change", onChange);
+ } else if (!val && prev) {
+ cm.off("cursorActivity", onCursorActivity);
+ cm.off("change", onChange);
+ clear(cm);
+ cm.state.markedSelection = cm.state.markedSelectionStyle = null;
+ }
+ });
+
+ function onCursorActivity(cm) {
+ cm.operation(function() { update(cm); });
+ }
+
+ function onChange(cm) {
+ if (cm.state.markedSelection.length)
+ cm.operation(function() { clear(cm); });
+ }
+
+ var CHUNK_SIZE = 8;
+ var Pos = CodeMirror.Pos;
+ var cmp = CodeMirror.cmpPos;
+
+ function coverRange(cm, from, to, addAt) {
+ if (cmp(from, to) == 0) return;
+ var array = cm.state.markedSelection;
+ var cls = cm.state.markedSelectionStyle;
+ for (var line = from.line;;) {
+ var start = line == from.line ? from : Pos(line, 0);
+ var endLine = line + CHUNK_SIZE, atEnd = endLine >= to.line;
+ var end = atEnd ? to : Pos(endLine, 0);
+ var mark = cm.markText(start, end, {className: cls});
+ if (addAt == null) array.push(mark);
+ else array.splice(addAt++, 0, mark);
+ if (atEnd) break;
+ line = endLine;
+ }
+ }
+
+ function clear(cm) {
+ var array = cm.state.markedSelection;
+ for (var i = 0; i < array.length; ++i) array[i].clear();
+ array.length = 0;
+ }
+
+ function reset(cm) {
+ clear(cm);
+ var ranges = cm.listSelections();
+ for (var i = 0; i < ranges.length; i++)
+ coverRange(cm, ranges[i].from(), ranges[i].to());
+ }
+
+ function update(cm) {
+ if (!cm.somethingSelected()) return clear(cm);
+ if (cm.listSelections().length > 1) return reset(cm);
+
+ var from = cm.getCursor("start"), to = cm.getCursor("end");
+
+ var array = cm.state.markedSelection;
+ if (!array.length) return coverRange(cm, from, to);
+
+ var coverStart = array[0].find(), coverEnd = array[array.length - 1].find();
+ if (!coverStart || !coverEnd || to.line - from.line < CHUNK_SIZE ||
+ cmp(from, coverEnd.to) >= 0 || cmp(to, coverStart.from) <= 0)
+ return reset(cm);
+
+ while (cmp(from, coverStart.from) > 0) {
+ array.shift().clear();
+ coverStart = array[0].find();
+ }
+ if (cmp(from, coverStart.from) < 0) {
+ if (coverStart.to.line - from.line < CHUNK_SIZE) {
+ array.shift().clear();
+ coverRange(cm, from, coverStart.to, 0);
+ } else {
+ coverRange(cm, from, coverStart.from, 0);
+ }
+ }
+
+ while (cmp(to, coverEnd.to) < 0) {
+ array.pop().clear();
+ coverEnd = array[array.length - 1].find();
+ }
+ if (cmp(to, coverEnd.to) > 0) {
+ if (to.line - coverEnd.from.line < CHUNK_SIZE) {
+ array.pop().clear();
+ coverRange(cm, coverEnd.from, to);
+ } else {
+ coverRange(cm, coverEnd.to, to);
+ }
+ }
+ }
+});