589 lines
19 KiB
JavaScript
589 lines
19 KiB
JavaScript
/* global TokenType, ViewActivity, TextUtils, Variables, Operator */
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function Parser(tokens) {
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this.tokens = tokens;
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this.tokensCount = tokens.length;
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this.position = 0;
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this.lastPosition = 0;
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this.labels = {};
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/** Оптимизация, чтобы каждый раз не искать endmenu/endif,
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* если их попросту нет в необработанном сценарии */
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this.hasEndMenu = false;
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this.hasEndIf = false;
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Variables.init();
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}
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Parser.prototype.EOF = new Token("", TokenType.EOF);
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Parser.prototype.getInstance = function () {
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return this;
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};
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Parser.prototype.next = function () {
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this.lastPosition = this.position;
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var terminal = false;
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var counter = 0;
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do {
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try {
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terminal = this.statement();
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} catch (re) {
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console.log("Parser.next() " + re);
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if (this.tokens.length === 0) return;
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}
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// антизацикливание
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counter++;
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if (counter >= 1000) {
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this.position++;
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counter = 0;
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}
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} while (!terminal);
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};
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Parser.prototype.findFrom = function(from, which, step) {
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var pos = from;
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while (true) {
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pos += step;
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if (pos < 0 || pos >= this.tokensCount) break;
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var token = this.tokens[pos];
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if (which === token.getType()) return pos;
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}
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// Возвращаем текущее значение во избежание лишних проверок.
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return from;
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};
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Parser.prototype.statement = function() {
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var token = this.get(0);
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if (this.match(token, TokenType.COMMAND)) return this.command();
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if (this.match(token, TokenType.SCENE)) return this.scene();
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if (this.match(token, TokenType.PLAY)) return this.play();
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// if (this.match(token, TokenType.QUEUE)) return this.queue();
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// if (this.match(token, TokenType.STOP)) return this.stop();
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if (this.match(token, TokenType.SHOW)) return this.show();
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if (this.match(token, TokenType.HIDE)) return this.hide();
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// if (this.match(token, TokenType.JUMP)) return this.jump();
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// if (this.match(token, TokenType.IF)) return this.ifStatement();
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/*if (this.lookMatch(1, TokenType.COLON)) {
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// menu:
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if (this.match(token, TokenType.MENU)) return this.menu();
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// Остаток от меню выбора. Пропускаем до появления ENDMENU.
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if (this.match(token, TokenType.TEXT)) {
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if (this.hasEndMenu) this.position += this.skipMenu();
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return false;
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}
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// Остаток от условного выражения. Пропускаем до появления ENDIF.
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if (this.match(token, TokenType.ELSE)) {
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if (this.hasEndIf) this.position += this.skipIf();
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return false;
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}
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}*/
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// Текст с именем автора реплики.
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if (this.lookMatch(1, TokenType.TEXT) && this.match(token, TokenType.WORD)) {
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var whoid = token.getText();
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ViewActivity.getInstance().text(whoid, this.consume(TokenType.TEXT).getText());
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return true;
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}
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// Обычный текст.
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if (this.match(token, TokenType.TEXT)) {
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ViewActivity.getInstance().text(token.getText());
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return true;
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}
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if (this.match(token, TokenType.EOF)) {
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ViewActivity.getInstance().finish();
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return true;
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}
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if (this.match(token, TokenType.WINDOW)) {
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if (this.match(TokenType.SHOW))
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return ViewActivity.getInstance().windowShow(this.matchWithEffect());
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else if (this.match(TokenType.HIDE))
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return ViewActivity.getInstance().windowHide(this.matchWithEffect());
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return false;
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}
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if (!TextUtils.isEmpty(this.matchWithEffect())) return false;
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this.position++;
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return false;
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};
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Parser.prototype.command = function() {
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var token = this.get(0);
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if (this.match(token, TokenType.RENPY_PAUSE)) {
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this.consume(TokenType.LPAREN);
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var pause = this.consumeDouble();
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var hard = false;
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if (!this.lookMatch(0, TokenType.RPAREN)) {
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this.consume(TokenType.WORD); // hard
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this.consume(TokenType.EQ);
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hard = this.consumeBoolean();
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}
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this.consume(TokenType.RPAREN);
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ViewActivity.getInstance().pause(Math.floor(1000 * pause), hard);
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return true;
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}
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if (this.match(token, TokenType.RENPY_SAY)) {
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this.consume(TokenType.LPAREN);
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var whoid = this.consume(TokenType.WORD).getText();
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// TODO: this.consume(TokenType.COMMA)
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var text = this.consume(TokenType.TEXT).getText();
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// TODO: this.consume(TokenType.COMMA)
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this.consume(TokenType.WORD); // interact
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this.consume(TokenType.EQ);
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var interact = this.consumeBoolean();
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this.consume(TokenType.RPAREN);
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ViewActivity.getInstance().text(whoid, text);
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return interact;
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}
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if (this.match(token, TokenType.PERSISTENT_SPRITE_TIME)) {
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this.consume(TokenType.EQ);
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this.consume(TokenType.TEXT);
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return false;
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}
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if (this.match(token, TokenType.PROLOG_TIME) ||
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this.match(token, TokenType.DAY_TIME) ||
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this.match(token, TokenType.SUNSET_TIME) ||
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this.match(token, TokenType.NIGHT_TIME)) {
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this.consume(TokenType.LPAREN);
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this.consume(TokenType.RPAREN);
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return false;
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}
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if (this.match(token, TokenType.MAKE_NAMES_KNOWN) ||
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this.match(token, TokenType.MAKE_NAMES_UNKNOWN)) {
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this.consume(TokenType.LPAREN);
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this.consume(TokenType.RPAREN);
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if (token.getType() === TokenType.MAKE_NAMES_KNOWN) {
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ViewActivity.getInstance().makeNamesKnown();
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} else ViewActivity.getInstance().makeNamesUnknown();
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return false;
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}
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if (this.match(token, TokenType.SET_NAME)) {
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this.consume(TokenType.LPAREN);
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var whoid = this.consume(TokenType.TEXT).getText();
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// TODO: this.consume(TokenType.COMMA)
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var name = this.consume(TokenType.TEXT).getText();
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this.consume(TokenType.RPAREN);
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ViewActivity.getInstance().meet(whoid, name);
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return false;
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}
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// Карта
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if (this.match(token, TokenType.DISABLE_ALL_ZONES)) {
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this.consume(TokenType.LPAREN);
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this.consume(TokenType.RPAREN);
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ViewActivity.getInstance().disableAllZones();
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return false;
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}
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if (this.match(token, TokenType.DISABLE_CURRENT_ZONE)) {
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this.consume(TokenType.LPAREN);
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this.consume(TokenType.RPAREN);
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ViewActivity.getInstance().disableCurrentZone();
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return false;
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}
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if (this.match(token, TokenType.RESET_ZONE)) {
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this.consume(TokenType.LPAREN);
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var zone = this.consume(TokenType.TEXT).getText();
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this.consume(TokenType.RPAREN);
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ViewActivity.getInstance().resetZone(zone);
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return false;
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}
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if (this.match(token, TokenType.SET_ZONE)) {
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this.consume(TokenType.LPAREN);
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var zone = this.consume(TokenType.TEXT).getText();
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// TODO: this.consume(TokenType.COMMA)
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var label = this.consume(TokenType.TEXT).getText();
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this.consume(TokenType.RPAREN);
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ViewActivity.getInstance().setZone(zone, label);
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return false;
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}
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if (this.match(token, TokenType.SHOW_MAP)) {
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this.consume(TokenType.LPAREN);
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this.consume(TokenType.RPAREN);
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ViewActivity.getInstance().showMap();
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return true;
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}
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if (this.match(token, TokenType.WORD)) {
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if (this.match(TokenType.EQ)) {
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// variable = expression
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Variables.setVariable(token.getText(), this.expression().eval());
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return false;
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}
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if (this.lookMatch(1, TokenType.EQ) && this.match(TokenType.PLUS)) {
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// variable += expression
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this.consume(TokenType.EQ);
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var varValue = Variables.getVariable(token.getText());
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Variables.setVariable(token.getText(), varValue + this.expression().eval());
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return false;
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}
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if (this.lookMatch(1, TokenType.EQ) && this.match(TokenType.MINUS)) {
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// variable -= expression
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this.consume(TokenType.EQ);
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var varValue = Variables.getVariable(token.getText());
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Variables.setVariable(token.getText(), varValue - this.expression().eval());
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return false;
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}
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}
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return false;
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};
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Parser.prototype.scene = function() {
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var type = "";
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if (this.match(TokenType.BG)) type = "bg";
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else if (this.match(TokenType.CG)) type = "cg";
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else if (this.match(TokenType.ANIM)) type = "anim";
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var name = this.consume(TokenType.WORD).getText();
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var effect = this.matchWithEffect();
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ViewActivity.getInstance().background(type, name, effect);
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return true;
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};
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Parser.prototype.show = function() {
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var whoid = this.consume(TokenType.WORD).getText();
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var params = ""; // emotion? cloth? distance?
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while (this.lookMatch(0, TokenType.WORD)) {
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var text = this.consume(TokenType.WORD).getText();
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params += text;
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if (text.equals("close") || text.equals("far")) break;
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}
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// Положение (left, cleft, ...)
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var position = "";
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if (this.match(TokenType.AT)) {
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position = this.consume(TokenType.WORD).getText();
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}
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// Псевдоним (для показа одно и того же спрайта в разных местах)
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var alias = "";
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if (this.match(TokenType.AS)) {
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alias = this.consume(TokenType.WORD).getText();
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}
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var effect = this.matchWithEffect();
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ViewActivity.getInstance().sprite(whoid, params, position, alias, effect);
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return false;
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};
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Parser.prototype.hide = function() {
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var whoid = this.consume(TokenType.WORD).getText();
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var effect = this.matchWithEffect();
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ViewActivity.getInstance().hideSprite(whoid, effect);
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return false;
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};
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Parser.prototype.play = function() {
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if (this.match(TokenType.MUSIC)) return this.playMusic();
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if (this.match(TokenType.AMBIENCE)) return this.playAmbience();
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if (this.lookMatch(0, TokenType.SOUND) || this.lookMatch(0, TokenType.SOUNDLOOP)) {
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return this.playSound();
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}
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return false;
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};
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Parser.prototype.playMusic = function() {
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var name = this.consumeMusicName();
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var fade = this.matchFade();
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ViewActivity.getInstance().music(name, fade);
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return false;
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};
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Parser.prototype.playSound = function() {
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var loop = false;
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if (this.match(TokenType.SOUND)) loop = false;
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else if (this.match(TokenType.SOUNDLOOP)) loop = true;
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var name = this.consumeMusicName();
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var fade = this.matchFade();
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ViewActivity.getInstance().sound(name, loop, fade);
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return false;
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};
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Parser.prototype.playAmbience = function() {
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var name = this.consumeMusicName();
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var fade = this.matchFade();
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return false;
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};
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Parser.prototype.expression = function() {
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return this.orTest();
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};
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Parser.prototype.orTest = function() {
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var expression = this.andTest();
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while (true) {
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if (this.match(TokenType.OR)) {
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expression = new BinaryExpression(Operator.BOOLEAN_OR, expression, this.andTest());
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continue;
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}
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break;
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}
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return expression;
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};
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Parser.prototype.andTest = function() {
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var expression = this.notTest();
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while (true) {
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if (this.match(TokenType.AND)) {
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expression = new BinaryExpression(Operator.BOOLEAN_AND, expression, this.notTest());
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continue;
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}
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break;
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}
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return expression;
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};
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Parser.prototype.notTest = function() {
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if (this.match(TokenType.NOT)) {
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return new ValueExpression( this.notTest().eval() != 0 ? 0 : 1 );
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}
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return this.comparison();
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};
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Parser.prototype.comparison = function() {
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var expression = this.additive();
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while (true) {
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if (this.lookMatch(1, TokenType.EQ)) {
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if (this.match(TokenType.EQ)) {
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// ==
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this.consume(TokenType.EQ);
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expression = new BinaryExpression(Operator.EQUALS, expression, this.additive());
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continue;
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}
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if (this.match(TokenType.GT)) {
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// >=
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this.consume(TokenType.EQ);
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expression = new BinaryExpression(Operator.GTEQ, expression, this.additive());
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continue;
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}
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if (this.match(TokenType.LT)) {
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// <=
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this.consume(TokenType.EQ);
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expression = new BinaryExpression(Operator.LTEQ, expression, this.additive());
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continue;
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}
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if (this.match(TokenType.EXCL)) {
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// !=
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this.consume(TokenType.EQ);
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expression = new BinaryExpression(Operator.NOTEQUALS, expression, this.additive());
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continue;
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}
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}
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if (this.match(TokenType.LT)) {
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expression = new BinaryExpression(Operator.LT, expression, this.additive());
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continue;
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}
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if (this.match(TokenType.GT)) {
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expression = new BinaryExpression(Operator.GT, expression, this.additive());
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continue;
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}
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break;
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}
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return expression;
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};
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Parser.prototype.additive = function() {
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var expression = this.unary();
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while (true) {
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if (this.match(TokenType.PLUS)) {
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expression = new BinaryExpression(Operator.ADD, expression, this.unary());
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continue;
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}
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if (this.match(TokenType.MINUS)) {
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expression = new BinaryExpression(Operator.SUBTRACT, expression, this.unary());
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continue;
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}
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break;
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}
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return expression;
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};
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Parser.prototype.unary = function() {
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if (this.match(TokenType.MINUS)) {
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return new ValueExpression( -this.primary().eval() );
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}
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if (this.match(TokenType.PLUS)) {
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return this.primary();
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}
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return this.primary();
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};
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Parser.prototype.primary = function() {
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var current = this.get(0);
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if (this.match(current, TokenType.NUMBER)) {
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return new ValueExpression( parseFloat(current.getText()) );
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}
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if (this.match(current, TokenType.WORD)) {
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return new VariableExpression(current.getText());
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}
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if (this.match(current, TokenType.LPAREN)) {
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var expr = this.expression();
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this.match(TokenType.RPAREN);
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return expr;
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}
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throw "Неизвестное выражение";
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};
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Parser.prototype.preScan = function() {
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// Сканируем все метки, для быстрого перехода командой jump.
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// А также определяем параметры для оптимизации.
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for (var i = 0; i < this.tokensCount - 2; i++) {
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var current = this.tokens[i].getType();
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if (current === TokenType.ENDMENU) {
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this.hasEndMenu = true;
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} else if (current === TokenType.ENDIF) {
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this.hasEndIf = true;
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} else if ( (current === TokenType.LABEL) &&
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(this.tokens[i + 2].getType() === TokenType.COLON) ) {
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// label word :
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var token = this.tokens[i + 1];
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if (token.getType() === TokenType.WORD) {
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// Добавляем позицию команды, следующей после метки.
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this.labels[token.getText()] = i + 3;
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}
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i += 2;
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}
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}
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};
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Parser.prototype.skipMenu = function() {
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var pos = 0;
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var level = 1; // уровень вложенности меню
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while (true) {
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// Расчёт уровня меню.
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if (this.lookMatch(pos, TokenType.MENU) && this.lookMatch(pos + 1, TokenType.COLON)) {
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level++;
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pos += 2;
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}
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if (this.lookMatch(pos, TokenType.ENDMENU)) {
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pos++;
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level--;
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// Завершаем работу по достижению ENDMENU первого уровня.
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if (level <= 0) break;
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}
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if (this.lookMatch(pos, TokenType.EOF)) return 0;
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pos++;
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}
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return pos;
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};
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Parser.prototype.skipIf = function() {
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var pos = 0;
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var level = 1;
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while (true) {
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if (this.lookMatch(pos, TokenType.IF)) level++;
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else if (this.lookMatch(pos, TokenType.ENDIF)) {
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pos++;
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level--;
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if (level <= 0) break;
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} else if (this.lookMatch(pos, TokenType.EOF)) return 0;
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pos++;
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}
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return pos;
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};
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Parser.prototype.consumeMusicName = function() {
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var name = "";
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if (this.lookMatch(1, TokenType.LBRACKET)) {
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// music_list["music"]
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this.consume(TokenType.WORD);
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this.consume(TokenType.LBRACKET);
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name = this.consume(TokenType.TEXT).getText();
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this.consume(TokenType.RBRACKET);
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} else if (this.lookMatch(0, TokenType.TEXT)) {
|
||
name = this.consume(TokenType.TEXT).getText();
|
||
} else {
|
||
name = this.consume(TokenType.WORD).getText();
|
||
}
|
||
return name;
|
||
};
|
||
|
||
Parser.prototype.matchFade = function() {
|
||
var result = new FadeInfo();
|
||
if (this.match(TokenType.FADEIN)) {
|
||
result.fadeIn = true;
|
||
result.duration = this.consumeDouble();
|
||
} else if (this.match(TokenType.FADEOUT)) {
|
||
result.fadeOut = true;
|
||
result.duration = this.consumeDouble();
|
||
}
|
||
return result;
|
||
};
|
||
|
||
Parser.prototype.matchWithEffect = function() {
|
||
if (this.match(TokenType.WITH)) {
|
||
return this.consume(TokenType.WORD).getText();
|
||
}
|
||
return "";
|
||
};
|
||
|
||
Parser.prototype.consumeDouble = function() {
|
||
return parseFloat(this.consume(TokenType.NUMBER).getText());
|
||
};
|
||
|
||
Parser.prototype.consumeBoolean = function() {
|
||
return "true" === (this.consume(TokenType.NUMBER).getText().toLowerCase());
|
||
};
|
||
|
||
Parser.prototype.matchWithEffect = function() {
|
||
if (this.match(TokenType.WITH)) {
|
||
return this.consume(TokenType.WORD).getText();
|
||
}
|
||
return "";
|
||
};
|
||
|
||
Parser.prototype.match_1 = function(type) {
|
||
if (this.get(0).getType() !== type) return false;
|
||
this.position++;
|
||
return true;
|
||
};
|
||
Parser.prototype.match_2 = function(token, type) {
|
||
if (type !== token.getType()) return false;
|
||
this.position++;
|
||
return true;
|
||
};
|
||
Parser.prototype.match = function(arg1, arg2) {
|
||
if (arguments.length === 1) return this.match_1(arg1);
|
||
else return this.match_2(arg1, arg2);
|
||
};
|
||
|
||
Parser.prototype.consume = function(type) {
|
||
if (this.get(0).getType() !== type) throw "Ожидался токен " + type + ".";
|
||
return this.tokens[this.position++];
|
||
};
|
||
|
||
Parser.prototype.lookMatch = function(pos, type) {
|
||
return (type === this.get(pos).getType());
|
||
};
|
||
|
||
Parser.prototype.get = function(offset) {
|
||
if (this.position + offset >= this.tokensCount) return this.EOF;
|
||
return this.tokens[this.position + offset];
|
||
};
|
||
|
||
|
||
|
||
|