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comments for emacs handleKeyboard

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This commit is contained in:
Robert Krahn 2013-02-19 15:26:58 -08:00
commit a82fcd0dc2
1 changed files with 29 additions and 21 deletions
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50
lib/ace/keyboard/emacs.js
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@ -164,6 +164,7 @@ exports.handler.bindKey = function(key, command) {
exports.handler.handleKeyboard = function(data, hashId, key, keyCode) {
// insertstring data.count times
if (hashId == -1) {
exports.setMarkMode(null);
if (data.count) {
@ -177,6 +178,8 @@ exports.handler.handleKeyboard = function(data, hashId, key, keyCode) {
return;
var modifier = eMods[hashId];
// CTRL + number / universalArgument for setting data.count
if (modifier == "c-" || data.universalArgument) {
var count = parseInt(key[key.length - 1]);
if (count) {
@ -186,42 +189,47 @@ exports.handler.handleKeyboard = function(data, hashId, key, keyCode) {
}
data.universalArgument = false;
if (modifier)
key = modifier + key;
// this.commandKeyBinding maps key specs like "c-p" (for CTRL + P) to
// command objects, for lookup key needs to include the modifier
if (modifier) key = modifier + key;
if (data.keyChain)
key = data.keyChain += " " + key;
// Key combos like CTRL+X H build up the data.keyChain
if (data.keyChain) key = data.keyChain += " " + key;
// Key combo prefixes get stored as "null" (String!) in this
// this.commmandKeyBinding. When encountered no command is invoked but we
// buld up data.keyChain
var command = this.commmandKeyBinding[key];
data.keyChain = command == "null" ? key : "";
if (!command)
return;
// there really is no command
if (!command) return;
if (command == "null")
return {command: "null"};
// we pass b/c of key combo or universalArgument
if (command === "null") return {command: "null"};
if (command == "universalArgument") {
if (command === "universalArgument") {
data.universalArgument = true;
return {command: "null"};
}
if (typeof command != "string") {
var args = command.args;
command = command.command;
if (command == "goorselect") {
command = args[0];
if (exports.markMode()) {
command = args[1];
}
// lookup command
// TODO extract special handling of markmode
// TODO special case command.command is really unnecessary, remove
var args;
if (typeof command !== "string") {
args = command.args;
if (command.command) command = command.command;
if (command === "goorselect") {
command = exports.markMode() ? args[1] : args[0];
args = null;
}
}
if (typeof command == "string") {
if (command == "insertstring" ||
command == "splitline" ||
command == "togglecomment") {
if (typeof command === "string") {
if (command === "insertstring" ||
command === "splitline" ||
command === "togglecomment") {
exports.setMarkMode(null);
}
command = this.commands[command] || data.editor.commands.commands[command];