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/**
* @fileoverview This file contains Hiragana/Katakana input mode class, which
* is used from ime.js.
*/
'use strict';
console.assert(
skk.mode, 'ime_mode_interface.js must be loaded prior to this module');
/**
* Initializes Hiragana/Katakana direct input mode.
* @constructor
* @implements {skk.mode.InputModeInterface}
* @param {skk.IME} ime IME instance.
*/
skk.mode.Kana = function(ime) {
this.ime_ = ime;
this.currentMapIndex_ = 0;
this.composer_ = new skk.Composer(skk.mode.Kana.maps[this.currentMapIndex_]);
console.debug('skk.mode.Kana: constructed');
};
/**
* Array holding Roman-Kana mapping. This is used for kana type toggling.
* @see skk.mode.Kana#toggleKanaType
*/
skk.mode.Kana.maps = [skk.Composer.map.hiragana, skk.Composer.map.katakana];
/**
* Toggles input kana type (Hiragana to Katakana, or Katakana to Hiragana).
*/
skk.mode.Kana.prototype.toggleKanaType = function() {
console.debug('skk.mode.Kana.toggleKanaType');
this.currentMapIndex_++;
this.currentMapIndex_ %= skk.mode.Kana.maps.length;
var map = skk.mode.Kana.maps[this.currentMapIndex_];
this.reset();
this.composer_ = new skk.Composer(map);
};
/**
* @inheritDoc
*/
skk.mode.Kana.prototype.reset = function() {
console.debug('skk.mode.Kana.reset');
this.composer_.reset();
skk.util.showPreedit(
this.ime_.context.contextID, this.composer_.undetermined);
};
/**
* @inheritDoc
*/
skk.mode.Kana.prototype.enter = function() {
console.debug('skk.mode.Kana.enter');
};
/**
* @inheritDoc
*/
skk.mode.Kana.prototype.leave = function() {
console.debug('skk.mode.Kana.leave');
this.composer_.reset();
skk.util.showPreedit(
this.ime_.context.contextID, this.composer_.undetermined);
};
/**
* @inheritDoc
*/
skk.mode.Kana.prototype.resume = function() {
console.debug('skk.mode.Kana.resume');
skk.util.showPreedit(
this.ime_.context.contextID, this.composer_.undetermined);
};
/**
* @inheritDoc
*/
skk.mode.Kana.prototype.suspend = function() {
console.debug('skk.mode.Kana.suspend');
skk.util.showPreedit(this.ime_.context.contextID, '');
};
/**
* @inheritDoc
*/
skk.mode.Kana.prototype.prepareForKey = function(keyEvent) {
console.debug('skk.mode.Kana.prepareForKey: ', keyEvent.key);
if (skk.util.isArrow(keyEvent.key) && this.composer_.hasUndetermined()) {
return null;
}
if (keyEvent.key === 'q') {
this.toggleKanaType();
return null;
}
if (keyEvent.key === 'l') {
this.ime_.switchMode(skk.InputMode.ASCII);
return null;
}
if (skk.util.isUpperLetter(keyEvent.key)) {
this.ime_.enterNewMode(skk.InputMode.PREEDIT);
return keyEvent;
}
if (skk.util.isBackspace(keyEvent.key) && this.composer_.hasUndetermined()) {
this.composer_.backspace();
skk.util.showPreedit(
this.ime_.context.contextID, this.composer_.undetermined);
return null;
}
return keyEvent;
};
/**
* @inheritDoc
*/
skk.mode.Kana.prototype.addKey = function(keyEvent) {
console.debug('skk.mode.Kana.addKey: ', keyEvent.key);
console.debug('skk.mode.Kana.addKey: ',
'undetermined = ', this.composer_.undetermined);
if (!skk.util.isPrintable(keyEvent.key)) { return false; }
if (keyEvent.ctrlKey || keyEvent.altKey) { return false; }
var determAndUndeterm = this.composer_.addKey(keyEvent.key);
var determined = determAndUndeterm[0];
var undetermined = determAndUndeterm[1];
chrome.input.ime.commitText(
{
contextID: this.ime_.context.contextID,
text: determined
});
skk.util.showPreedit(this.ime_.context.contextID, undetermined);
return true;
};