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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. If annotateScrollbar is enabled, the occurences
// will be highlighted on the scrollbar via the matchesonscrollbar addon.
(function(mod) {
if (typeof exports == "object" && typeof module == "object") // CommonJS
mod(require("../../lib/codemirror"), require("./matchesonscrollbar"));
else if (typeof define == "function" && define.amd) // AMD
define(["../../lib/codemirror", "./matchesonscrollbar"], mod);
else // Plain browser env
mod(CodeMirror);
})(function(CodeMirror) {
"use strict";
var defaults = {
style: "matchhighlight",
minChars: 2,
delay: 100,
wordsOnly: false,
annotateScrollbar: false,
showToken: false,
trim: true
}
function State(options) {
this.options = {}
for (var name in defaults)
this.options[name] = (options && options.hasOwnProperty(name) ? options : defaults)[name]
this.overlay = this.timeout = null;
this.matchesonscroll = null;
this.active = false;
}
CodeMirror.defineOption("highlightSelectionMatches", false, function(cm, val, old) {
if (old && old != CodeMirror.Init) {
removeOverlay(cm);
clearTimeout(cm.state.matchHighlighter.timeout);
cm.state.matchHighlighter = null;
cm.off("cursorActivity", cursorActivity);
cm.off("focus", onFocus)
}
if (val) {
var state = cm.state.matchHighlighter = new State(val);
if (cm.hasFocus()) {
state.active = true
highlightMatches(cm)
} else {
cm.on("focus", onFocus)
}
cm.on("cursorActivity", cursorActivity);
}
});
function cursorActivity(cm) {
var state = cm.state.matchHighlighter;
if (state.active || cm.hasFocus()) scheduleHighlight(cm, state)
}
function onFocus(cm) {
var state = cm.state.matchHighlighter
if (!state.active) {
state.active = true
scheduleHighlight(cm, state)
}
}
function scheduleHighlight(cm, state) {
clearTimeout(state.timeout);
state.timeout = setTimeout(function() {highlightMatches(cm);}, state.options.delay);
}
function addOverlay(cm, query, hasBoundary, style) {
var state = cm.state.matchHighlighter;
cm.addOverlay(state.overlay = makeOverlay(query, hasBoundary, style));
if (state.options.annotateScrollbar && cm.showMatchesOnScrollbar) {
var searchFor = hasBoundary ? new RegExp("\\b" + query + "\\b") : query;
state.matchesonscroll = cm.showMatchesOnScrollbar(searchFor, false,
{className: "CodeMirror-selection-highlight-scrollbar"});
}
}
function removeOverlay(cm) {
var state = cm.state.matchHighlighter;
if (state.overlay) {
cm.removeOverlay(state.overlay);
state.overlay = null;
if (state.matchesonscroll) {
state.matchesonscroll.clear();
state.matchesonscroll = null;
}
}
}
function highlightMatches(cm) {
cm.operation(function() {
var state = cm.state.matchHighlighter;
removeOverlay(cm);
if (!cm.somethingSelected() && state.options.showToken) {
var re = state.options.showToken === true ? /[\w$]/ : state.options.showToken;
var cur = cm.getCursor(), line = cm.getLine(cur.line), start = cur.ch, end = start;
while (start && re.test(line.charAt(start - 1))) --start;
while (end < line.length && re.test(line.charAt(end))) ++end;
if (start < end)
addOverlay(cm, line.slice(start, end), re, state.options.style);
return;
}
var from = cm.getCursor("from"), to = cm.getCursor("to");
if (from.line != to.line) return;
if (state.options.wordsOnly && !isWord(cm, from, to)) return;
var selection = cm.getRange(from, to)
if (state.options.trim) selection = selection.replace(/^\s+|\s+$/g, "")
if (selection.length >= state.options.minChars)
addOverlay(cm, selection, false, state.options.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();
}};
}
});
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