The Tor Browser: browser/devtools/sourceeditor/codemirror/keymap/emacs.js@6474c204b198 (annotated)

browser/devtools/sourceeditor/codemirror/keymap/emacs.js@6474c204b198 (annotated)

browser/devtools/sourceeditor/codemirror/keymap/emacs.js

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

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