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vim.js
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vim.js
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/**
* Supported keybindings:
*
* Motion:
* h, j, k, l
* e, E, w, W, b, B, ge, gE
* f<character>, F<character>, t<character>, T<character>
* $, ^, 0
* gg, G
* %
* '<character>, `<character>
*
* Operator:
* d, y, c
* dd, yy, cc
* g~, g~g~
* >, <, >>, <<
*
* Operator-Motion:
* x, X, D, Y, C, ~
*
* Action:
* a, i, s, A, I, S, o, O
* J
* u, Ctrl-r
* m<character>
* r<character>
*
* Modes:
* ESC - leave insert mode, visual mode, and clear input state.
* Ctrl-[, Ctrl-c - same as ESC.
*
* Registers: unamed, -, a-z, A-Z, 0-9
* (Does not respect the special case for number registers when delete
* operator is made with these commands: %, (, ), , /, ?, n, N, {, } )
* TODO: Implement the remaining registers.
* Marks: a-z, A-Z, and 0-9
* TODO: Implement the remaining special marks. They have more complex
* behavior.
*
* Code structure:
* 1. Default keymap
* 2. Variable declarations and short basic helpers
* 3. Instance (External API) implementation
* 4. Internal state tracking objects (input state, counter) implementation
* and instanstiation
* 5. Key handler (the main command dispatcher) implementation
* 6. Motion, operator, and action implementations
* 7. Helper functions for the key handler, motions, operators, and actions
* 8. Set up Vim to work as a keymap for CodeMirror.
*/
(function() {
'use strict';
var defaultKeymap = [
// Key to key mapping. This goes first to make it possible to override
// existing mappings.
{ keys: ['Left'], type: 'keyToKey', toKeys: ['h'] },
{ keys: ['Right'], type: 'keyToKey', toKeys: ['l'] },
{ keys: ['Up'], type: 'keyToKey', toKeys: ['k'] },
{ keys: ['Down'], type: 'keyToKey', toKeys: ['j'] },
{ keys: ['Space'], type: 'keyToKey', toKeys: ['l'] },
{ keys: ['Backspace'], type: 'keyToKey', toKeys: ['h'] },
{ keys: ['Ctrl-Space'], type: 'keyToKey', toKeys: ['W'] },
{ keys: ['Ctrl-Backspace'], type: 'keyToKey', toKeys: ['B'] },
{ keys: ['Shift-Space'], type: 'keyToKey', toKeys: ['w'] },
{ keys: ['Shift-Backspace'], type: 'keyToKey', toKeys: ['b'] },
{ keys: ['Ctrl-n'], type: 'keyToKey', toKeys: ['j'] },
{ keys: ['Ctrl-p'], type: 'keyToKey', toKeys: ['k'] },
{ keys: ['Ctrl-['], type: 'keyToKey', toKeys: ['Esc'] },
{ keys: ['Ctrl-c'], type: 'keyToKey', toKeys: ['Esc'] },
{ keys: ['s'], type: 'keyToKey', toKeys: ['c', 'l'] },
{ keys: ['S'], type: 'keyToKey', toKeys: ['c', 'c'] },
{ keys: ['Home'], type: 'keyToKey', toKeys: ['0'] },
{ keys: ['End'], type: 'keyToKey', toKeys: ['$'] },
{ keys: ['PageUp'], type: 'keyToKey', toKeys: ['Ctrl-b'] },
{ keys: ['PageDown'], type: 'keyToKey', toKeys: ['Ctrl-f'] },
// Motions
{ keys: ['h'], type: 'motion',
motion: 'moveByCharacters',
motionArgs: { forward: false }},
{ keys: ['l'], type: 'motion',
motion: 'moveByCharacters',
motionArgs: { forward: true }},
{ keys: ['j'], type: 'motion',
motion: 'moveByLines',
motionArgs: { forward: true, linewise: true }},
{ keys: ['k'], type: 'motion',
motion: 'moveByLines',
motionArgs: { forward: false, linewise: true }},
{ keys: ['w'], type: 'motion',
motion: 'moveByWords',
motionArgs: { forward: true, wordEnd: false }},
{ keys: ['W'], type: 'motion',
motion: 'moveByWords',
motionArgs: { forward: true, wordEnd: false, bigWord: true }},
{ keys: ['e'], type: 'motion',
motion: 'moveByWords',
motionArgs: { forward: true, wordEnd: true, inclusive: true }},
{ keys: ['E'], type: 'motion',
motion: 'moveByWords',
motionArgs: { forward: true, wordEnd: true, bigWord: true,
inclusive: true }},
{ keys: ['b'], type: 'motion',
motion: 'moveByWords',
motionArgs: { forward: false, wordEnd: false }},
{ keys: ['B'], type: 'motion',
motion: 'moveByWords',
motionArgs: { forward: false, wordEnd: false, bigWord: true }},
{ keys: ['g', 'e'], type: 'motion',
motion: 'moveByWords',
motionArgs: { forward: false, wordEnd: true, inclusive: true }},
{ keys: ['g', 'E'], type: 'motion',
motion: 'moveByWords',
motionArgs: { forward: false, wordEnd: true, bigWord: true,
inclusive: true }},
{ keys: ['Ctrl-f'], type: 'motion',
motion: 'moveByPage', motionArgs: { forward: true }},
{ keys: ['Ctrl-b'], type: 'motion',
motion: 'moveByPage', motionArgs: { forward: false }},
{ keys: ['g', 'g'], type: 'motion',
motion: 'moveToLineOrEdgeOfDocument',
motionArgs: { forward: false, explicitRepeat: true, linewise: true }},
{ keys: ['G'], type: 'motion',
motion: 'moveToLineOrEdgeOfDocument',
motionArgs: { forward: true, explicitRepeat: true, linewise: true }},
{ keys: ['0'], type: 'motion', motion: 'moveToStartOfLine' },
{ keys: ['^'], type: 'motion',
motion: 'moveToFirstNonWhiteSpaceCharacter' },
{ keys: ['$'], type: 'motion',
motion: 'moveToEol',
motionArgs: { inclusive: true }},
{ keys: ['%'], type: 'motion',
motion: 'moveToMatchedSymbol',
motionArgs: { inclusive: true }},
{ keys: ['f', 'character'], type: 'motion',
motion: 'moveToCharacter',
motionArgs: { forward: true , inclusive: true }},
{ keys: ['F', 'character'], type: 'motion',
motion: 'moveToCharacter',
motionArgs: { forward: false }},
{ keys: ['t', 'character'], type: 'motion',
motion: 'moveTillCharacter',
motionArgs: { forward: true, inclusive: true }},
{ keys: ['T', 'character'], type: 'motion',
motion: 'moveTillCharacter',
motionArgs: { forward: false }},
{ keys: ['\'', 'character'], type: 'motion', motion: 'goToMark' },
{ keys: ['`', 'character'], type: 'motion', motion: 'goToMark' },
{ keys: ['|'], type: 'motion',
motion: 'moveToColumn',
motionArgs: { }},
// Operators
{ keys: ['d'], type: 'operator', operator: 'delete' },
{ keys: ['y'], type: 'operator', operator: 'yank' },
{ keys: ['c'], type: 'operator', operator: 'change',
operatorArgs: { enterInsertMode: true } },
{ keys: ['>'], type: 'operator', operator: 'indent',
operatorArgs: { indentRight: true }},
{ keys: ['<'], type: 'operator', operator: 'indent',
operatorArgs: { indentRight: false }},
{ keys: ['g', '~'], type: 'operator', operator: 'swapcase' },
{ keys: ['n'], type: 'motion', motion: 'findNext' },
{ keys: ['N'], type: 'motion', motion: 'findPrev' },
// Operator-Motion dual commands
{ keys: ['x'], type: 'operatorMotion', operator: 'delete',
motion: 'moveByCharacters', motionArgs: { forward: true },
operatorMotionArgs: { visualLine: false }},
{ keys: ['X'], type: 'operatorMotion', operator: 'delete',
motion: 'moveByCharacters', motionArgs: { forward: false },
operatorMotionArgs: { visualLine: true }},
{ keys: ['D'], type: 'operatorMotion', operator: 'delete',
motion: 'moveToEol', motionArgs: { inclusive: true },
operatorMotionArgs: { visualLine: true }},
{ keys: ['Y'], type: 'operatorMotion', operator: 'yank',
motion: 'moveToEol', motionArgs: { inclusive: true },
operatorMotionArgs: { visualLine: true }},
{ keys: ['C'], type: 'operatorMotion',
operator: 'change', operatorArgs: { enterInsertMode: true },
motion: 'moveToEol', motionArgs: { inclusive: true },
operatorMotionArgs: { visualLine: true }},
{ keys: ['~'], type: 'operatorMotion', operator: 'swapcase',
motion: 'moveByCharacters', motionArgs: { forward: true }},
// Actions
{ keys: ['a'], type: 'action', action: 'enterInsertMode',
actionArgs: { insertAt: 'charAfter' }},
{ keys: ['A'], type: 'action', action: 'enterInsertMode',
actionArgs: { insertAt: 'eol' }},
{ keys: ['i'], type: 'action', action: 'enterInsertMode' },
{ keys: ['I'], type: 'action', action: 'enterInsertMode',
motion: 'moveToFirstNonWhiteSpaceCharacter' },
{ keys: ['o'], type: 'action', action: 'newLineAndEnterInsertMode',
actionArgs: { after: true }},
{ keys: ['O'], type: 'action', action: 'newLineAndEnterInsertMode',
actionArgs: { after: false }},
{ keys: ['v'], type: 'action', action: 'toggleVisualMode' },
{ keys: ['V'], type: 'action', action: 'toggleVisualMode',
actionArgs: { linewise: true }},
{ keys: ['J'], type: 'action', action: 'joinLines' },
{ keys: ['p'], type: 'action', action: 'paste',
actionArgs: { after: true }},
{ keys: ['P'], type: 'action', action: 'paste',
actionArgs: { after: false }},
{ keys: ['r', 'character'], type: 'action', action: 'replace' },
{ keys: ['u'], type: 'action', action: 'undo' },
{ keys: ['Ctrl-r'], type: 'action', action: 'redo' },
{ keys: ['m', 'character'], type: 'action', action: 'setMark' },
{ keys: ['\"', 'character'], type: 'action', action: 'setRegister' },
{ keys: [',', '/'], type: 'action', action: 'clearSearchHighlight' },
// Text object motions
{ keys: ['a', 'character'], type: 'motion',
motion: 'textObjectManipulation' },
{ keys: ['i', 'character'], type: 'motion',
motion: 'textObjectManipulation',
motionArgs: { textObjectInner: true }},
// Search
{ keys: ['/'], type: 'search',
searchArgs: { forward: true, querySrc: 'prompt' }},
{ keys: ['?'], type: 'search',
searchArgs: { forward: false, querySrc: 'prompt' }},
{ keys: ['*'], type: 'search',
searchArgs: { forward: true, querySrc: 'wordUnderCursor' }},
{ keys: ['#'], type: 'search',
searchArgs: { forward: false, querySrc: 'wordUnderCursor' }},
// Ex command
{ keys: [':'], type: 'ex' }
];
var Vim = function() {
var alphabetRegex = /[A-Za-z]/;
var numberRegex = /[\d]/;
var whiteSpaceRegex = /\s/;
var wordRegexp = [(/\w/), (/[^\w\s]/)], bigWordRegexp = [(/\S/)];
function makeKeyRange(start, size) {
var keys = [];
for (var i = start; i < start + size; i++) {
keys.push(String.fromCharCode(i));
}
return keys;
}
var upperCaseAlphabet = makeKeyRange(65, 26);
var lowerCaseAlphabet = makeKeyRange(97, 26);
var numbers = makeKeyRange(48, 10);
var SPECIAL_SYMBOLS = '~`!@#$%^&*()_-+=[{}]\\|/?.,<>:;\"\'';
var specialSymbols = SPECIAL_SYMBOLS.split('');
var specialKeys = ['Left', 'Right', 'Up', 'Down', 'Space', 'Backspace',
'Esc', 'Home', 'End', 'PageUp', 'PageDown'];
var validMarks = upperCaseAlphabet.concat(lowerCaseAlphabet).concat(
numbers);
var validRegisters = upperCaseAlphabet.concat(lowerCaseAlphabet).concat(
numbers).concat('-\"'.split(''));
function isAlphabet(k) {
return alphabetRegex.test(k);
}
function isLine(cm, line) {
return line >= 0 && line < cm.lineCount();
}
function isLowerCase(k) {
return (/^[a-z]$/).test(k);
}
function isMatchableSymbol(k) {
return '()[]{}'.indexOf(k) != -1;
}
function isNumber(k) {
return numberRegex.test(k);
}
function isUpperCase(k) {
return (/^[A-Z]$/).test(k);
}
function isAlphanumeric(k) {
return (/^[\w]$/).test(k);
}
function isWhiteSpace(k) {
return whiteSpaceRegex.test(k);
}
function isWhiteSpaceString(k) {
return (/^\s*$/).test(k);
}
function inRangeInclusive(x, start, end) {
return x >= start && x <= end;
}
function inArray(val, arr) {
for (var i = 0; i < arr.length; i++) {
if (arr[i] == val) {
return true;
}
}
return false;
}
// Global Vim state. Call getVimGlobalState to get and initialize.
var vimGlobalState;
function getVimGlobalState() {
if (!vimGlobalState) {
vimGlobalState = {
// The current search query.
searchQuery: null,
// Whether we are searching backwards.
searchIsReversed: false,
registerController: new RegisterController({})
};
}
return vimGlobalState;
}
function getVimState(cm) {
if (!cm.vimState) {
// Store instance state in the CodeMirror object.
cm.vimState = {
inputState: new InputState(),
// When using jk for navigation, if you move from a longer line to a
// shorter line, the cursor may clip to the end of the shorter line.
// If j is pressed again and cursor goes to the next line, the
// cursor should go back to its horizontal position on the longer
// line if it can. This is to keep track of the horizontal position.
lastHPos: -1,
// The last motion command run. Cleared if a non-motion command gets
// executed in between.
lastMotion: null,
marks: {},
visualMode: false,
// If we are in visual line mode. No effect if visualMode is false.
visualLine: false
};
}
return cm.vimState;
}
var vimApi= {
buildKeyMap: function() {
// TODO: Convert keymap into dictionary format for fast lookup.
},
// Testing hook, though it might be useful to expose the register
// controller anyways.
getRegisterController: function() {
return getVimGlobalState().registerController;
},
// Testing hook.
clearVimGlobalState_: function() {
vimGlobalState = null;
},
map: function(lhs, rhs) {
// Add user defined key bindings.
exCommandDispatcher.map(lhs, rhs);
},
// Initializes vim state variable on the CodeMirror object. Should only be
// called lazily by handleKey or for testing.
maybeInitState: function(cm) {
getVimState(cm);
},
// This is the outermost function called by CodeMirror, after keys have
// been mapped to their Vim equivalents.
handleKey: function(cm, key) {
var command;
var vim = getVimState(cm);
if (key == 'Esc') {
// Clear input state and get back to normal mode.
vim.inputState.reset();
if (vim.visualMode) {
exitVisualMode(cm, vim);
}
return;
}
if (vim.visualMode &&
cursorEqual(cm.getCursor('head'), cm.getCursor('anchor'))) {
// The selection was cleared. Exit visual mode.
exitVisualMode(cm, vim);
}
if (!vim.visualMode &&
!cursorEqual(cm.getCursor('head'), cm.getCursor('anchor'))) {
vim.visualMode = true;
vim.visualLine = false;
}
if (key != '0' || (key == '0' && vim.inputState.getRepeat() === 0)) {
// Have to special case 0 since it's both a motion and a number.
command = commandDispatcher.matchCommand(key, defaultKeymap, vim);
}
if (!command) {
if (isNumber(key)) {
// Increment count unless count is 0 and key is 0.
vim.inputState.pushRepeatDigit(key);
}
return;
}
if (command.type == 'keyToKey') {
// TODO: prevent infinite recursion.
for (var i = 0; i < command.toKeys.length; i++) {
this.handleKey(cm, command.toKeys[i]);
}
} else {
commandDispatcher.processCommand(cm, vim, command);
}
}
};
// Represents the current input state.
function InputState() {
this.reset();
}
InputState.prototype.reset = function() {
this.prefixRepeat = [];
this.motionRepeat = [];
this.operator = null;
this.operatorArgs = null;
this.motion = null;
this.motionArgs = null;
this.keyBuffer = []; // For matching multi-key commands.
this.registerName = null; // Defaults to the unamed register.
};
InputState.prototype.pushRepeatDigit = function(n) {
if (!this.operator) {
this.prefixRepeat = this.prefixRepeat.concat(n);
} else {
this.motionRepeat = this.motionRepeat.concat(n);
}
};
InputState.prototype.getRepeat = function() {
var repeat = 0;
if (this.prefixRepeat.length > 0 || this.motionRepeat.length > 0) {
repeat = 1;
if (this.prefixRepeat.length > 0) {
repeat *= parseInt(this.prefixRepeat.join(''), 10);
}
if (this.motionRepeat.length > 0) {
repeat *= parseInt(this.motionRepeat.join(''), 10);
}
}
return repeat;
};
/*
* Register stores information about copy and paste registers. Besides
* text, a register must store whether it is linewise (i.e., when it is
* pasted, should it insert itself into a new line, or should the text be
* inserted at the cursor position.)
*/
function Register(text, linewise) {
this.clear();
if (text) {
this.set(text, linewise);
}
}
Register.prototype = {
set: function(text, linewise) {
this.text = text;
this.linewise = !!linewise;
},
append: function(text, linewise) {
// if this register has ever been set to linewise, use linewise.
if (linewise || this.linewise) {
this.text += '\n' + text;
this.linewise = true;
} else {
this.text += text;
}
},
clear: function() {
this.text = '';
this.linewise = false;
},
toString: function() { return this.text; }
};
/*
* vim registers allow you to keep many independent copy and paste buffers.
* See http://usevim.com/2012/04/13/registers/ for an introduction.
*
* RegisterController keeps the state of all the registers. An initial
* state may be passed in. The unnamed register '"' will always be
* overridden.
*/
function RegisterController(registers) {
this.registers = registers;
this.unamedRegister = registers['\"'] = new Register();
}
RegisterController.prototype = {
pushText: function(registerName, operator, text, linewise) {
// Lowercase and uppercase registers refer to the same register.
// Uppercase just means append.
var register = this.isValidRegister(registerName) ?
this.getRegister(registerName) : null;
// if no register/an invalid register was specified, things go to the
// default registers
if (!register) {
switch (operator) {
case 'yank':
// The 0 register contains the text from the most recent yank.
this.registers['0'] = new Register(text, linewise);
break;
case 'delete':
case 'change':
if (text.indexOf('\n') == -1) {
// Delete less than 1 line. Update the small delete register.
this.registers['-'] = new Register(text, linewise);
} else {
// Shift down the contents of the numbered registers and put the
// deleted text into register 1.
this.shiftNumericRegisters_();
this.registers['1'] = new Register(text, linewise);
}
break;
}
// Make sure the unnamed register is set to what just happened
this.unamedRegister.set(text, linewise);
return;
}
// If we've gotten to this point, we've actually specified a register
var append = isUpperCase(registerName);
if (append) {
register.append(text, linewise);
// The unamed register always has the same value as the last used
// register.
this.unamedRegister.append(text, linewise);
} else {
register.set(text, linewise);
this.unamedRegister.set(text, linewise);
}
},
// Gets the register named @name. If one of @name doesn't already exist,
// create it. If @name is invalid, return the unamedRegister.
getRegister: function(name) {
if (!this.isValidRegister(name)) {
return this.unamedRegister;
}
name = name.toLowerCase();
if (!this.registers[name]) {
this.registers[name] = new Register();
}
return this.registers[name];
},
isValidRegister: function(name) {
return name && inArray(name, validRegisters);
},
shiftNumericRegisters_: function() {
for (var i = 9; i >= 2; i--) {
this.registers[i] = this.getRegister('' + (i - 1));
}
}
};
var commandDispatcher = {
matchCommand: function(key, keyMap, vim) {
var inputState = vim.inputState;
var keys = inputState.keyBuffer.concat(key);
for (var i = 0; i < keyMap.length; i++) {
var command = keyMap[i];
if (matchKeysPartial(keys, command.keys)) {
if (keys.length < command.keys.length) {
// Matches part of a multi-key command. Buffer and wait for next
// stroke.
inputState.keyBuffer.push(key);
return null;
} else {
if (inputState.operator && command.type == 'action') {
// Ignore matched action commands after an operator. Operators
// only operate on motions. This check is really for text
// objects since aW, a[ etcs conflicts with a.
continue;
}
// Matches whole comand. Return the command.
if (command.keys[keys.length - 1] == 'character') {
inputState.selectedCharacter = keys[keys.length - 1];
}
inputState.keyBuffer = [];
return command;
}
}
}
// Clear the buffer since there are no partial matches.
inputState.keyBuffer = [];
return null;
},
processCommand: function(cm, vim, command) {
switch (command.type) {
case 'motion':
this.processMotion(cm, vim, command);
break;
case 'operator':
this.processOperator(cm, vim, command);
break;
case 'operatorMotion':
this.processOperatorMotion(cm, vim, command);
break;
case 'action':
this.processAction(cm, vim, command);
break;
case 'search':
this.processSearch(cm, vim, command);
break;
case 'ex':
case 'keyToEx':
this.processEx(cm, vim, command);
break;
default:
break;
}
},
processMotion: function(cm, vim, command) {
vim.inputState.motion = command.motion;
vim.inputState.motionArgs = copyArgs(command.motionArgs);
this.evalInput(cm, vim);
},
processOperator: function(cm, vim, command) {
var inputState = vim.inputState;
if (inputState.operator) {
if (inputState.operator == command.operator) {
// Typing an operator twice like 'dd' makes the operator operate
// linewise
inputState.motion = 'expandToLine';
inputState.motionArgs = { linewise: true };
this.evalInput(cm, vim);
return;
} else {
// 2 different operators in a row doesn't make sense.
inputState.reset();
}
}
inputState.operator = command.operator;
inputState.operatorArgs = copyArgs(command.operatorArgs);
if (vim.visualMode) {
// Operating on a selection in visual mode. We don't need a motion.
this.evalInput(cm, vim);
}
},
processOperatorMotion: function(cm, vim, command) {
var visualMode = vim.visualMode;
var operatorMotionArgs = copyArgs(command.operatorMotionArgs);
if (operatorMotionArgs) {
// Operator motions may have special behavior in visual mode.
if (visualMode && operatorMotionArgs.visualLine) {
vim.visualLine = true;
}
}
this.processOperator(cm, vim, command);
if (!visualMode) {
this.processMotion(cm, vim, command);
}
},
processAction: function(cm, vim, command) {
var inputState = vim.inputState;
var repeat = inputState.getRepeat();
var repeatIsExplicit = !!repeat;
var actionArgs = copyArgs(command.actionArgs) || {};
if (inputState.selectedCharacter) {
actionArgs.selectedCharacter = inputState.selectedCharacter;
}
// Actions may or may not have motions and operators. Do these first.
if (command.operator) {
this.processOperator(cm, vim, command);
}
if (command.motion) {
this.processMotion(cm, vim, command);
}
if (command.motion || command.operator) {
this.evalInput(cm, vim);
}
actionArgs.repeat = repeat || 1;
actionArgs.repeatIsExplicit = repeatIsExplicit;
actionArgs.registerName = inputState.registerName;
inputState.reset();
vim.lastMotion = null,
actions[command.action](cm, actionArgs, vim);
},
processSearch: function(cm, vim, command) {
if (!cm.getSearchCursor) {
// Search depends on SearchCursor.
return;
}
var forward = command.searchArgs.forward;
getSearchState(cm).setReversed(!forward);
var promptPrefix = (forward) ? '/' : '?';
function handleQuery(query, ignoreCase, smartCase) {
updateSearchQuery(cm, query, ignoreCase, smartCase);
commandDispatcher.processMotion(cm, vim, {
type: 'motion',
motion: 'findNext'
});
}
function onPromptClose(query) {
handleQuery(query, true /** ignoreCase */, true /** smartCase */);
}
switch (command.searchArgs.querySrc) {
case 'prompt':
showPrompt(cm, onPromptClose, promptPrefix, searchPromptDesc);
break;
case 'wordUnderCursor':
var word = expandWordUnderCursor(cm, false /** inclusive */,
true /** forward */, false /** bigWord */,
true /** noSymbol */);
var isKeyword = true;
if (!word) {
word = expandWordUnderCursor(cm, false /** inclusive */,
true /** forward */, false /** bigWord */,
false /** noSymbol */);
isKeyword = false;
}
if (!word) {
return;
}
var query = cm.getLine(word.start.line).substring(word.start.ch,
word.end.ch + 1);
if (isKeyword) {
query = '\\b' + query + '\\b';
} else {
query = escapeRegex(query);
}
cm.setCursor(word.start);
handleQuery(query, true /** ignoreCase */, false /** smartCase */);
break;
}
},
processEx: function(cm, vim, command) {
function onPromptClose(input) {
exCommandDispatcher.processCommand(cm, input);
}
if (command.type == 'keyToEx') {
// Handle user defined Ex to Ex mappings
exCommandDispatcher.processCommand(cm, command.exArgs.input);
} else {
showPrompt(cm, onPromptClose, ':');
}
},
evalInput: function(cm, vim) {
// If the motion comand is set, execute both the operator and motion.
// Otherwise return.
var inputState = vim.inputState;
var motion = inputState.motion;
var motionArgs = inputState.motionArgs || {};
var operator = inputState.operator;
var operatorArgs = inputState.operatorArgs || {};
var registerName = inputState.registerName;
var selectionEnd = cm.getCursor('head');
var selectionStart = cm.getCursor('anchor');
// The difference between cur and selection cursors are that cur is
// being operated on and ignores that there is a selection.
var curStart = copyCursor(selectionEnd);
var curOriginal = copyCursor(curStart);
var curEnd;
var repeat;
if (motionArgs.repeat !== undefined) {
// If motionArgs specifies a repeat, that takes precedence over the
// input state's repeat. Used by Ex mode and can be user defined.
repeat = inputState.motionArgs.repeat;
} else {
repeat = inputState.getRepeat();
}
if (repeat > 0 && motionArgs.explicitRepeat) {
motionArgs.repeatIsExplicit = true;
} else if (motionArgs.noRepeat ||
(!motionArgs.explicitRepeat && repeat === 0)) {
repeat = 1;
motionArgs.repeatIsExplicit = false;
}
if (inputState.selectedCharacter) {
// If there is a character input, stick it in all of the arg arrays.
motionArgs.selectedCharacter = operatorArgs.selectedCharacter =
inputState.selectedCharacter;
}
motionArgs.repeat = repeat;
inputState.reset();
if (motion) {
var motionResult = motions[motion](cm, motionArgs, vim);
vim.lastMotion = motions[motion];
if (!motionResult) {
return;
}
if (motionResult instanceof Array) {
curStart = motionResult[0];
curEnd = motionResult[1];
} else {
curEnd = motionResult;
}
// TODO: Handle null returns from motion commands better.
if (!curEnd) {
curEnd = { ch: curStart.ch, line: curStart.line };
}
if (vim.visualMode) {
// Check if the selection crossed over itself. Will need to shift
// the start point if that happened.
if (cursorIsBefore(selectionStart, selectionEnd) &&
(cursorEqual(selectionStart, curEnd) ||
cursorIsBefore(curEnd, selectionStart))) {
// The end of the selection has moved from after the start to
// before the start. We will shift the start right by 1.
selectionStart.ch += 1;
} else if (cursorIsBefore(selectionEnd, selectionStart) &&
(cursorEqual(selectionStart, curEnd) ||
cursorIsBefore(selectionStart, curEnd))) {
// The opposite happened. We will shift the start left by 1.
selectionStart.ch -= 1;
}
selectionEnd = curEnd;
if (vim.visualLine) {
if (cursorIsBefore(selectionStart, selectionEnd)) {
selectionStart.ch = 0;
selectionEnd.ch = lineLength(cm, selectionEnd.line);
} else {
selectionEnd.ch = 0;
selectionStart.ch = lineLength(cm, selectionStart.line);
}
}
// Need to set the cursor to clear the selection. Otherwise,
// CodeMirror can't figure out that we changed directions...
cm.setCursor(selectionStart);
cm.setSelection(selectionStart, selectionEnd);
} else if (!operator) {
curEnd = clipCursorToContent(cm, curEnd);
cm.setCursor(curEnd.line, curEnd.ch);
}
}
if (operator) {
var inverted = false;
vim.lastMotion = null;
operatorArgs.repeat = repeat; // Indent in visual mode needs this.
if (vim.visualMode) {
curStart = selectionStart;
curEnd = selectionEnd;
motionArgs.inclusive = true;
}
// Swap start and end if motion was backward.
if (cursorIsBefore(curEnd, curStart)) {
var tmp = curStart;
curStart = curEnd;
curEnd = tmp;
inverted = true;
}
if (motionArgs.inclusive && !(vim.visualMode && inverted)) {
// Move the selection end one to the right to include the last
// character.
curEnd.ch++;
}
var linewise = motionArgs.linewise ||
(vim.visualMode && vim.visualLine);
if (linewise) {
// Expand selection to entire line.
expandSelectionToLine(cm, curStart, curEnd);
} else if (motionArgs.forward) {
// Clip to trailing newlines only if we the motion goes forward.
clipToLine(cm, curStart, curEnd);
}
operatorArgs.registerName = registerName;
// Keep track of linewise as it affects how paste and change behave.
operatorArgs.linewise = linewise;
operators[operator](cm, operatorArgs, vim, curStart,
curEnd, curOriginal);
if (vim.visualMode) {
exitVisualMode(cm, vim);
}
if (operatorArgs.enterInsertMode) {
actions.enterInsertMode(cm);
}
}
}
};
/**
* typedef {Object{line:number,ch:number}} Cursor An object containing the
* position of the cursor.
*/
// All of the functions below return Cursor objects.
var motions = {
expandToLine: function(cm, motionArgs) {
// Expands forward to end of line, and then to next line if repeat is
// >1. Does not handle backward motion!
var cur = cm.getCursor();
return { line: cur.line + motionArgs.repeat - 1, ch: Infinity };
},
findNext: function(cm, motionArgs, vim) {
return findNext(cm, false /** prev */, motionArgs.repeat);
},
findPrev: function(cm, motionArgs, vim) {
return findNext(cm, true /** prev */, motionArgs.repeat);
},
goToMark: function(cm, motionArgs, vim) {
var mark = vim.marks[motionArgs.selectedCharacter];
if (mark) {
return mark.find();
}
return null;
},
moveByCharacters: function(cm, motionArgs) {
var cur = cm.getCursor();
var repeat = motionArgs.repeat;
var ch = motionArgs.forward ? cur.ch + repeat : cur.ch - repeat;
return { line: cur.line, ch: ch };
},
moveByLines: function(cm, motionArgs, vim) {
var endCh = cm.getCursor().ch;
// Depending what our last motion was, we may want to do different
// things. If our last motion was moving vertically, we want to
// preserve the HPos from our last horizontal move. If our last motion
// was going to the end of a line, moving vertically we should go to
// the end of the line, etc.
switch (vim.lastMotion) {
case this.moveByLines:
case this.moveToColumn:
case this.moveToEol:
endCh = vim.lastHPos;
break;
default:
vim.lastHPos = endCh;
}
var cur = cm.getCursor();
var repeat = motionArgs.repeat;
var line = motionArgs.forward ? cur.line + repeat : cur.line - repeat;
if (line < 0 || line > cm.lineCount() - 1) {
return null;
}
return { line: line, ch: endCh };
},
moveByPage: function(cm, motionArgs) {
// CodeMirror only exposes functions that move the cursor page down, so
// doing this bad hack to move the cursor and move it back. evalInput
// will move the cursor to where it should be in the end.
var curStart = cm.getCursor();
var repeat = motionArgs.repeat;
cm.moveV((motionArgs.forward ? repeat : -repeat), 'page');
var curEnd = cm.getCursor();
cm.setCursor(curStart);
return curEnd;
},
moveByWords: function(cm, motionArgs) {
return moveToWord(cm, motionArgs.repeat, !!motionArgs.forward,
!!motionArgs.wordEnd, !!motionArgs.bigWord);
},
moveTillCharacter: function(cm, motionArgs) {
var repeat = motionArgs.repeat;
var curEnd = moveToCharacter(cm, repeat, motionArgs.forward,
motionArgs.selectedCharacter);
var increment = motionArgs.forward ? -1 : 1;
curEnd.ch += increment;
return curEnd;
},
moveToCharacter: function(cm, motionArgs) {
var repeat = motionArgs.repeat;
return moveToCharacter(cm, repeat, motionArgs.forward,
motionArgs.selectedCharacter);
},
moveToColumn: function(cm, motionArgs, vim) {
var repeat = motionArgs.repeat;
// repeat is equivalent to which column we want to move to!
vim.lastHPos = repeat - 1;
return moveToColumn(cm, repeat);
},
moveToEol: function(cm, motionArgs, vim) {
var cur = cm.getCursor();
vim.lastHPos = Infinity;
return { line: cur.line + motionArgs.repeat - 1, ch: Infinity };
},
moveToFirstNonWhiteSpaceCharacter: function(cm) {
// Go to the start of the line where the text begins, or the end for
// whitespace-only lines
var cursor = cm.getCursor();
var line = cm.getLine(cursor.line);
return { line: cursor.line,
ch: findFirstNonWhiteSpaceCharacter(cm.getLine(cursor.line)) };
},
moveToMatchedSymbol: function(cm, motionArgs) {
var cursor = cm.getCursor();
var symbol = cm.getLine(cursor.line).charAt(cursor.ch);
if (isMatchableSymbol(symbol)) {
return findMatchedSymbol(cm, cm.getCursor(), motionArgs.symbol);
} else {
return cursor;
}
},
moveToStartOfLine: function(cm) {
var cursor = cm.getCursor();
return { line: cursor.line, ch: 0 };
},
moveToLineOrEdgeOfDocument: function(cm, motionArgs) {
var lineNum = motionArgs.forward ? cm.lineCount() - 1 : 0;
if (motionArgs.repeatIsExplicit) {
lineNum = motionArgs.repeat - 1;
}
return { line: lineNum,
ch: findFirstNonWhiteSpaceCharacter(cm.getLine(lineNum)) };
},
textObjectManipulation: function(cm, motionArgs) {
var character = motionArgs.selectedCharacter;
// Inclusive is the difference between a and i
// TODO: Instead of using the additional text object map to perform text
// object operations, merge the map into the defaultKeyMap and use
// motionArgs to define behavior. Define separate entries for 'aw',
// 'iw', 'a[', 'i[', etc.
var inclusive = !motionArgs.textObjectInner;
if (!textObjects[character]) {
// No text object defined for this, don't move.
return null;
}
var tmp = textObjects[character](cm, inclusive);
var start = tmp.start;
var end = tmp.end;
return [start, end];
}
};