enigma-bbs/core/edit_text_view.js

/* jslint node: true */
'use strict';

//	ENiGMA½
const TextView		= require('./text_view.js').TextView;
const miscUtil		= require('./misc_util.js');
const strUtil		= require('./string_util.js');

//	deps
const _				= require('lodash');

exports.EditTextView	= EditTextView;

function EditTextView(options) {
    options.acceptsFocus 	= miscUtil.valueWithDefault(options.acceptsFocus, true);
    options.acceptsInput	= miscUtil.valueWithDefault(options.acceptsInput, true);
    options.cursorStyle		= miscUtil.valueWithDefault(options.cursorStyle, 'steady block');
    options.resizable		= false;

    TextView.call(this, options);

    this.cursorPos = { row : 0, col : 0 };

    this.clientBackspace = function() {
        const fillCharSGR = this.getStyleSGR(1) || this.getSGR();
        this.client.term.write(`\b${fillCharSGR}${this.fillChar}\b${this.getFocusSGR()}`);
    };
}

require('util').inherits(EditTextView, TextView);

EditTextView.prototype.onKeyPress = function(ch, key) {
    if(key) {
        if(this.isKeyMapped('backspace', key.name)) {
            if(this.text.length > 0) {
                this.text = this.text.substr(0, this.text.length - 1);

                if(this.text.length >= this.dimens.width) {
                    this.redraw();
                } else {
                    this.cursorPos.col -= 1;
                    if(this.cursorPos.col >= 0) {
                        this.clientBackspace();
                    }
                }
            }

            return EditTextView.super_.prototype.onKeyPress.call(this, ch, key);
        } else if(this.isKeyMapped('clearLine', key.name)) {
            this.text			= '';
            this.cursorPos.col	= 0;
            this.setFocus(true);	//	resetting focus will redraw & adjust cursor

            return EditTextView.super_.prototype.onKeyPress.call(this, ch, key);
        }
    }

    if(ch && strUtil.isPrintable(ch)) {
        if(this.text.length < this.maxLength) {
            ch = strUtil.stylizeString(ch, this.textStyle);

            this.text += ch;

            if(this.text.length > this.dimens.width) {
                //	no shortcuts - redraw the view
                this.redraw();
            } else {
                this.cursorPos.col += 1;

                if(_.isString(this.textMaskChar)) {
                    if(this.textMaskChar.length > 0) {
                        this.client.term.write(this.textMaskChar);
                    }
                } else {
                    this.client.term.write(ch);
                }
            }
        }
    }

    EditTextView.super_.prototype.onKeyPress.call(this, ch, key);
};

EditTextView.prototype.setText = function(text) {
    //	draw & set |text|
    EditTextView.super_.prototype.setText.call(this, text);

    //	adjust local cursor tracking
    this.cursorPos = { row : 0, col : text.length };
};