413 lines
13 KiB
JavaScript
413 lines
13 KiB
JavaScript
// CodeMirror, copyright (c) by Marijn Haverbeke and others
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// Distributed under an MIT license: http://codemirror.net/LICENSE
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(function(mod) {
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if (typeof exports == "object" && typeof module == "object") // CommonJS
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mod(require("../lib/codemirror"));
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else if (typeof define == "function" && define.amd) // AMD
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define(["../lib/codemirror"], mod);
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else // Plain browser env
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mod(CodeMirror);
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})(function(CodeMirror) {
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"use strict";
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var Pos = CodeMirror.Pos;
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function posEq(a, b) { return a.line == b.line && a.ch == b.ch; }
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// Kill 'ring'
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var killRing = [];
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function addToRing(str) {
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killRing.push(str);
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if (killRing.length > 50) killRing.shift();
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}
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function growRingTop(str) {
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if (!killRing.length) return addToRing(str);
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killRing[killRing.length - 1] += str;
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}
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function getFromRing(n) { return killRing[killRing.length - (n ? Math.min(n, 1) : 1)] || ""; }
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function popFromRing() { if (killRing.length > 1) killRing.pop(); return getFromRing(); }
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var lastKill = null;
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function kill(cm, from, to, mayGrow, text) {
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if (text == null) text = cm.getRange(from, to);
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if (mayGrow && lastKill && lastKill.cm == cm && posEq(from, lastKill.pos) && cm.isClean(lastKill.gen))
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growRingTop(text);
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else
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addToRing(text);
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cm.replaceRange("", from, to, "+delete");
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if (mayGrow) lastKill = {cm: cm, pos: from, gen: cm.changeGeneration()};
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else lastKill = null;
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}
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// Boundaries of various units
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function byChar(cm, pos, dir) {
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return cm.findPosH(pos, dir, "char", true);
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}
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function byWord(cm, pos, dir) {
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return cm.findPosH(pos, dir, "word", true);
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}
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function byLine(cm, pos, dir) {
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return cm.findPosV(pos, dir, "line", cm.doc.sel.goalColumn);
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}
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function byPage(cm, pos, dir) {
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return cm.findPosV(pos, dir, "page", cm.doc.sel.goalColumn);
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}
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function byParagraph(cm, pos, dir) {
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var no = pos.line, line = cm.getLine(no);
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var sawText = /\S/.test(dir < 0 ? line.slice(0, pos.ch) : line.slice(pos.ch));
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var fst = cm.firstLine(), lst = cm.lastLine();
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for (;;) {
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no += dir;
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if (no < fst || no > lst)
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return cm.clipPos(Pos(no - dir, dir < 0 ? 0 : null));
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line = cm.getLine(no);
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var hasText = /\S/.test(line);
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if (hasText) sawText = true;
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else if (sawText) return Pos(no, 0);
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}
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}
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function bySentence(cm, pos, dir) {
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var line = pos.line, ch = pos.ch;
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var text = cm.getLine(pos.line), sawWord = false;
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for (;;) {
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var next = text.charAt(ch + (dir < 0 ? -1 : 0));
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if (!next) { // End/beginning of line reached
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if (line == (dir < 0 ? cm.firstLine() : cm.lastLine())) return Pos(line, ch);
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text = cm.getLine(line + dir);
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if (!/\S/.test(text)) return Pos(line, ch);
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line += dir;
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ch = dir < 0 ? text.length : 0;
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continue;
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}
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if (sawWord && /[!?.]/.test(next)) return Pos(line, ch + (dir > 0 ? 1 : 0));
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if (!sawWord) sawWord = /\w/.test(next);
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ch += dir;
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}
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}
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function byExpr(cm, pos, dir) {
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var wrap;
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if (cm.findMatchingBracket && (wrap = cm.findMatchingBracket(pos, true))
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&& wrap.match && (wrap.forward ? 1 : -1) == dir)
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return dir > 0 ? Pos(wrap.to.line, wrap.to.ch + 1) : wrap.to;
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for (var first = true;; first = false) {
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var token = cm.getTokenAt(pos);
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var after = Pos(pos.line, dir < 0 ? token.start : token.end);
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if (first && dir > 0 && token.end == pos.ch || !/\w/.test(token.string)) {
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var newPos = cm.findPosH(after, dir, "char");
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if (posEq(after, newPos)) return pos;
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else pos = newPos;
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} else {
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return after;
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}
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}
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}
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// Prefixes (only crudely supported)
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function getPrefix(cm, precise) {
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var digits = cm.state.emacsPrefix;
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if (!digits) return precise ? null : 1;
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clearPrefix(cm);
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return digits == "-" ? -1 : Number(digits);
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}
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function repeated(cmd) {
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var f = typeof cmd == "string" ? function(cm) { cm.execCommand(cmd); } : cmd;
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return function(cm) {
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var prefix = getPrefix(cm);
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f(cm);
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for (var i = 1; i < prefix; ++i) f(cm);
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};
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}
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function findEnd(cm, pos, by, dir) {
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var prefix = getPrefix(cm);
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if (prefix < 0) { dir = -dir; prefix = -prefix; }
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for (var i = 0; i < prefix; ++i) {
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var newPos = by(cm, pos, dir);
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if (posEq(newPos, pos)) break;
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pos = newPos;
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}
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return pos;
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}
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function move(by, dir) {
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var f = function(cm) {
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cm.extendSelection(findEnd(cm, cm.getCursor(), by, dir));
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};
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f.motion = true;
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return f;
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}
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function killTo(cm, by, dir) {
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var selections = cm.listSelections(), cursor;
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var i = selections.length;
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while (i--) {
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cursor = selections[i].head;
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kill(cm, cursor, findEnd(cm, cursor, by, dir), true);
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}
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}
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function killRegion(cm) {
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if (cm.somethingSelected()) {
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var selections = cm.listSelections(), selection;
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var i = selections.length;
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while (i--) {
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selection = selections[i];
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kill(cm, selection.anchor, selection.head);
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}
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return true;
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}
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}
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function addPrefix(cm, digit) {
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if (cm.state.emacsPrefix) {
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if (digit != "-") cm.state.emacsPrefix += digit;
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return;
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}
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// Not active yet
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cm.state.emacsPrefix = digit;
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cm.on("keyHandled", maybeClearPrefix);
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cm.on("inputRead", maybeDuplicateInput);
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}
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var prefixPreservingKeys = {"Alt-G": true, "Ctrl-X": true, "Ctrl-Q": true, "Ctrl-U": true};
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function maybeClearPrefix(cm, arg) {
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if (!cm.state.emacsPrefixMap && !prefixPreservingKeys.hasOwnProperty(arg))
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clearPrefix(cm);
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}
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function clearPrefix(cm) {
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cm.state.emacsPrefix = null;
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cm.off("keyHandled", maybeClearPrefix);
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cm.off("inputRead", maybeDuplicateInput);
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}
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function maybeDuplicateInput(cm, event) {
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var dup = getPrefix(cm);
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if (dup > 1 && event.origin == "+input") {
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var one = event.text.join("\n"), txt = "";
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for (var i = 1; i < dup; ++i) txt += one;
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cm.replaceSelection(txt);
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}
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}
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function addPrefixMap(cm) {
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cm.state.emacsPrefixMap = true;
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cm.addKeyMap(prefixMap);
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cm.on("keyHandled", maybeRemovePrefixMap);
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cm.on("inputRead", maybeRemovePrefixMap);
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}
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function maybeRemovePrefixMap(cm, arg) {
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if (typeof arg == "string" && (/^\d$/.test(arg) || arg == "Ctrl-U")) return;
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cm.removeKeyMap(prefixMap);
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cm.state.emacsPrefixMap = false;
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cm.off("keyHandled", maybeRemovePrefixMap);
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cm.off("inputRead", maybeRemovePrefixMap);
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}
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// Utilities
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function setMark(cm) {
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cm.setCursor(cm.getCursor());
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cm.setExtending(!cm.getExtending());
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cm.on("change", function() { cm.setExtending(false); });
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}
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function clearMark(cm) {
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cm.setExtending(false);
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cm.setCursor(cm.getCursor());
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}
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function getInput(cm, msg, f) {
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if (cm.openDialog)
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cm.openDialog(msg + ": <input type=\"text\" style=\"width: 10em\"/>", f, {bottom: true});
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else
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f(prompt(msg, ""));
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}
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function operateOnWord(cm, op) {
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var start = cm.getCursor(), end = cm.findPosH(start, 1, "word");
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cm.replaceRange(op(cm.getRange(start, end)), start, end);
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cm.setCursor(end);
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}
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function toEnclosingExpr(cm) {
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var pos = cm.getCursor(), line = pos.line, ch = pos.ch;
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var stack = [];
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while (line >= cm.firstLine()) {
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var text = cm.getLine(line);
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for (var i = ch == null ? text.length : ch; i > 0;) {
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var ch = text.charAt(--i);
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if (ch == ")")
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stack.push("(");
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else if (ch == "]")
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stack.push("[");
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else if (ch == "}")
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stack.push("{");
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else if (/[\(\{\[]/.test(ch) && (!stack.length || stack.pop() != ch))
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return cm.extendSelection(Pos(line, i));
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}
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--line; ch = null;
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}
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}
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function quit(cm) {
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cm.execCommand("clearSearch");
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clearMark(cm);
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}
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// Actual keymap
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var keyMap = CodeMirror.keyMap.emacs = CodeMirror.normalizeKeyMap({
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"Ctrl-W": function(cm) {kill(cm, cm.getCursor("start"), cm.getCursor("end"));},
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"Ctrl-K": repeated(function(cm) {
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var start = cm.getCursor(), end = cm.clipPos(Pos(start.line));
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var text = cm.getRange(start, end);
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if (!/\S/.test(text)) {
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text += "\n";
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end = Pos(start.line + 1, 0);
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}
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kill(cm, start, end, true, text);
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}),
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"Alt-W": function(cm) {
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addToRing(cm.getSelection());
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clearMark(cm);
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},
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"Ctrl-Y": function(cm) {
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var start = cm.getCursor();
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cm.replaceRange(getFromRing(getPrefix(cm)), start, start, "paste");
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cm.setSelection(start, cm.getCursor());
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},
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"Alt-Y": function(cm) {cm.replaceSelection(popFromRing(), "around", "paste");},
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"Ctrl-Space": setMark, "Ctrl-Shift-2": setMark,
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"Ctrl-F": move(byChar, 1), "Ctrl-B": move(byChar, -1),
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"Right": move(byChar, 1), "Left": move(byChar, -1),
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"Ctrl-D": function(cm) { killTo(cm, byChar, 1); },
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"Delete": function(cm) { killRegion(cm) || killTo(cm, byChar, 1); },
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"Ctrl-H": function(cm) { killTo(cm, byChar, -1); },
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"Backspace": function(cm) { killRegion(cm) || killTo(cm, byChar, -1); },
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"Alt-F": move(byWord, 1), "Alt-B": move(byWord, -1),
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"Alt-D": function(cm) { killTo(cm, byWord, 1); },
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"Alt-Backspace": function(cm) { killTo(cm, byWord, -1); },
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"Ctrl-N": move(byLine, 1), "Ctrl-P": move(byLine, -1),
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"Down": move(byLine, 1), "Up": move(byLine, -1),
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"Ctrl-A": "goLineStart", "Ctrl-E": "goLineEnd",
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"End": "goLineEnd", "Home": "goLineStart",
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"Alt-V": move(byPage, -1), "Ctrl-V": move(byPage, 1),
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"PageUp": move(byPage, -1), "PageDown": move(byPage, 1),
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"Ctrl-Up": move(byParagraph, -1), "Ctrl-Down": move(byParagraph, 1),
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"Alt-A": move(bySentence, -1), "Alt-E": move(bySentence, 1),
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"Alt-K": function(cm) { killTo(cm, bySentence, 1); },
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"Ctrl-Alt-K": function(cm) { killTo(cm, byExpr, 1); },
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"Ctrl-Alt-Backspace": function(cm) { killTo(cm, byExpr, -1); },
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"Ctrl-Alt-F": move(byExpr, 1), "Ctrl-Alt-B": move(byExpr, -1),
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"Shift-Ctrl-Alt-2": function(cm) {
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var cursor = cm.getCursor();
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cm.setSelection(findEnd(cm, cursor, byExpr, 1), cursor);
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},
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"Ctrl-Alt-T": function(cm) {
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var leftStart = byExpr(cm, cm.getCursor(), -1), leftEnd = byExpr(cm, leftStart, 1);
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var rightEnd = byExpr(cm, leftEnd, 1), rightStart = byExpr(cm, rightEnd, -1);
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cm.replaceRange(cm.getRange(rightStart, rightEnd) + cm.getRange(leftEnd, rightStart) +
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cm.getRange(leftStart, leftEnd), leftStart, rightEnd);
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},
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"Ctrl-Alt-U": repeated(toEnclosingExpr),
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"Alt-Space": function(cm) {
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var pos = cm.getCursor(), from = pos.ch, to = pos.ch, text = cm.getLine(pos.line);
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while (from && /\s/.test(text.charAt(from - 1))) --from;
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while (to < text.length && /\s/.test(text.charAt(to))) ++to;
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cm.replaceRange(" ", Pos(pos.line, from), Pos(pos.line, to));
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},
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"Ctrl-O": repeated(function(cm) { cm.replaceSelection("\n", "start"); }),
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"Ctrl-T": repeated(function(cm) {
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cm.execCommand("transposeChars");
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}),
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"Alt-C": repeated(function(cm) {
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operateOnWord(cm, function(w) {
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var letter = w.search(/\w/);
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if (letter == -1) return w;
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return w.slice(0, letter) + w.charAt(letter).toUpperCase() + w.slice(letter + 1).toLowerCase();
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});
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}),
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"Alt-U": repeated(function(cm) {
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operateOnWord(cm, function(w) { return w.toUpperCase(); });
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}),
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"Alt-L": repeated(function(cm) {
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operateOnWord(cm, function(w) { return w.toLowerCase(); });
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}),
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"Alt-;": "toggleComment",
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"Ctrl-/": repeated("undo"), "Shift-Ctrl--": repeated("undo"),
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"Ctrl-Z": repeated("undo"), "Cmd-Z": repeated("undo"),
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"Shift-Alt-,": "goDocStart", "Shift-Alt-.": "goDocEnd",
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"Ctrl-S": "findNext", "Ctrl-R": "findPrev", "Ctrl-G": quit, "Shift-Alt-5": "replace",
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"Alt-/": "autocomplete",
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"Ctrl-J": "newlineAndIndent", "Enter": false, "Tab": "indentAuto",
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"Alt-G G": function(cm) {
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var prefix = getPrefix(cm, true);
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if (prefix != null && prefix > 0) return cm.setCursor(prefix - 1);
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getInput(cm, "Goto line", function(str) {
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var num;
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if (str && !isNaN(num = Number(str)) && num == (num|0) && num > 0)
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cm.setCursor(num - 1);
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});
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},
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"Ctrl-X Tab": function(cm) {
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cm.indentSelection(getPrefix(cm, true) || cm.getOption("indentUnit"));
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},
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"Ctrl-X Ctrl-X": function(cm) {
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cm.setSelection(cm.getCursor("head"), cm.getCursor("anchor"));
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},
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"Ctrl-X Ctrl-S": "save",
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"Ctrl-X Ctrl-W": "save",
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"Ctrl-X S": "saveAll",
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"Ctrl-X F": "open",
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"Ctrl-X U": repeated("undo"),
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"Ctrl-X K": "close",
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"Ctrl-X Delete": function(cm) { kill(cm, cm.getCursor(), bySentence(cm, cm.getCursor(), 1), true); },
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"Ctrl-X H": "selectAll",
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"Ctrl-Q Tab": repeated("insertTab"),
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"Ctrl-U": addPrefixMap
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});
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var prefixMap = {"Ctrl-G": clearPrefix};
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function regPrefix(d) {
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prefixMap[d] = function(cm) { addPrefix(cm, d); };
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keyMap["Ctrl-" + d] = function(cm) { addPrefix(cm, d); };
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prefixPreservingKeys["Ctrl-" + d] = true;
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}
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for (var i = 0; i < 10; ++i) regPrefix(String(i));
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regPrefix("-");
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});
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