taipa/lib/dparser/guide.js

Taiwanese morphological parsing library

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.Guide = void 0;
const configuration_1 = require("./configuration");
const symbols_1 = require("./symbols");
const document_1 = require("../document");
class Guide {
    transitions = new Array();
    s1 = new document_1.Node('');
    s2 = new document_1.Node('');
    b1 = new document_1.Node('');
    s1B1Map = new Map()
        .set(symbols_1.Tagset.vb + symbols_1.Tagset.ppv, new configuration_1.Shift())
        .set(symbols_1.Tagset.npr + symbols_1.Tagset.vb, new configuration_1.Shift())
        .set(symbols_1.Tagset.npr + symbols_1.Tagset.npr, new configuration_1.Shift())
        .set(symbols_1.Tagset.appr + symbols_1.Tagset.npr, new configuration_1.Shift())
        .set(symbols_1.Tagset.vb + symbols_1.Tagset.npr, new configuration_1.Shift())
        .set(symbols_1.Tagset.vb + symbols_1.Tagset.psub, new configuration_1.Shift())
        .set(symbols_1.Tagset.aux + symbols_1.Tagset.vb, new configuration_1.Shift())
        .set(symbols_1.Tagset.padv + symbols_1.Tagset.vb, new configuration_1.Shift())
        .set(symbols_1.Tagset.npr + symbols_1.Tagset.padv, new configuration_1.Shift())
        .set(symbols_1.Tagset.vb + symbols_1.Tagset.appr, new configuration_1.Shift())
        .set(symbols_1.Tagset.vb + symbols_1.Tagset.padv, new configuration_1.Shift())
        .set(symbols_1.Tagset.npr + symbols_1.Tagset.aux, new configuration_1.Shift())
        .set(symbols_1.Tagset.ppv + symbols_1.Tagset.psub, new configuration_1.RightArc())
        .set(symbols_1.Tagset.ppv + symbols_1.Tagset.npr, new configuration_1.RightArc());
    s2S1Map = new Map()
        .set(symbols_1.Tagset.vb + symbols_1.Tagset.ppv, new configuration_1.RightArc())
        .set(symbols_1.Tagset.vb + symbols_1.Tagset.psub, new configuration_1.RightArc())
        .set(symbols_1.Tagset.aux + symbols_1.Tagset.vb, new configuration_1.LeftArc())
        .set(symbols_1.Tagset.padv + symbols_1.Tagset.vb, new configuration_1.LeftArc())
        .set(symbols_1.Tagset.appr + symbols_1.Tagset.npr, new configuration_1.LeftArc())
        .set(symbols_1.Tagset.vb + symbols_1.Tagset.vb, new configuration_1.RightArc())
        .set(symbols_1.Tagset.vb + symbols_1.Tagset.npr, new configuration_1.RightArc())
        .set(symbols_1.Tagset.npr + symbols_1.Tagset.vb, new configuration_1.LeftArc());
    isQueueEmpty(c) {
        if (c.queue.length === 0)
            return true;
        return false;
    }
    isTwoNodesInStack(c) {
        if (c.stack.length === 2)
            return true;
        return false;
    }
    getNextTransition(c) {
        this.s1 = new document_1.Node('');
        if (c.stack.length > 0)
            this.s1 = c.stack[c.stack.length - 1];
        this.s2 = new document_1.Node('');
        if (c.stack.length > 1)
            this.s2 = c.stack[c.stack.length - 2];
        this.b1 = new document_1.Node('');
        if (c.queue.length > 0)
            this.b1 = c.queue[0];
        if (this.s1.tag != '' && this.b1.tag != '') {
            if (this.s1B1Map.has(this.s1.tag + this.b1.tag)) {
                const tran = this.s1B1Map.get(this.s1.tag + this.b1.tag);
                if (tran) {
                    this.transitions.push(tran);
                }
            }
        }
        else if (this.isQueueEmpty(c)) {
            if (this.s2S1Map.has(this.s2.tag + this.s1.tag)) {
                const tran = this.s2S1Map.get(this.s2.tag + this.s1.tag);
                if (tran) {
                    this.transitions.push(tran);
                }
            }
            else if (this.isTwoNodesInStack(c)) {
                this.transitions.push(new configuration_1.RightArc());
            }
        }
        if (this.transitions.length == 0)
            return undefined;
        return this.transitions.shift();
    }
}
exports.Guide = Guide;
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