extensions/objects/templates/math-equation-editor.component.ts - develop - githubmirror/oppia

extensions/objects/templates/math-equation-editor.component.ts
161 строка5 KB
Hardik Goyal
Fix #7092: Remove downgradeComponent (#21903)
18 фев 2025, 21:22
18 фев 2025, 21:224dbd84c
// Copyright 2020 The Oppia Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS-IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

/**
 * @fileoverview Component for math equation editor.
 */

// Every editor component should implement an alwaysEditable option. There
// may be additional customization options for the editor that should be passed
// in via initArgs.
import {
  Component,
  EventEmitter,
  Input,
  OnDestroy,
  OnInit,
  Output,
} from '@angular/core';
import {ObjectFormValidityChangeEvent} from 'app-events/app-events';
import {EventBusGroup, EventBusService} from 'app-events/event-bus.service';
import {AppConstants} from 'app.constants';
import {DeviceInfoService} from 'services/contextual/device-info.service';
import {GuppyConfigurationService} from 'services/guppy-configuration.service';
import {GuppyInitializationService} from 'services/guppy-initialization.service';
import {MathInteractionsService} from 'services/math-interactions.service';
import {TranslateService} from '@ngx-translate/core';

export interface FocusObj {
  focused: boolean;
}

@Component({
  selector: 'math-equation-editor',
  templateUrl: './math-equation-editor.component.html',
  styleUrls: [],
})
export class MathEquationEditorComponent implements OnInit, OnDestroy {
  // These properties are initialized using Angular lifecycle hooks
  // and we need to do non-null assertion. For more information, see
  // https://github.com/oppia/oppia/wiki/Guide-on-defining-types#ts-7-1
  @Input() modalId!: symbol;
  @Input() value!: string;
  @Output() valueChanged = new EventEmitter();
  eventBusGroup!: EventBusGroup;
  currentValue!: string;
  warningText: string = '';
  hasBeenTouched: boolean = false;
  alwaysEditable: boolean = false;

  constructor(
    private deviceInfoService: DeviceInfoService,
    private guppyConfigurationService: GuppyConfigurationService,
    private guppyInitializationService: GuppyInitializationService,
    private mathInteractionsService: MathInteractionsService,
    private eventBusService: EventBusService,
    private translateService: TranslateService
  ) {
    this.eventBusGroup = new EventBusGroup(this.eventBusService);
  }

  ngOnInit(): void {
    this.alwaysEditable = true;
    this.hasBeenTouched = false;
    if (this.value === undefined || this.value === null) {
      this.value = '';
      this.valueChanged.emit(this.value);
    }
    this.currentValue = this.value;
    this.guppyConfigurationService.init();
    let translatedPlaceholder = this.translateService.instant(
      AppConstants.MATH_INTERACTION_PLACEHOLDERS.MathEquationInput
    );
    this.guppyInitializationService.init(
      'guppy-div-creator',
      translatedPlaceholder,
      this.value
    );

    Guppy.event('change', (focusObj: FocusObj) => {
      const activeGuppyObject =
        this.guppyInitializationService.findActiveGuppyObject();
      if (activeGuppyObject !== undefined) {
        this.hasBeenTouched = true;
        this.currentValue = activeGuppyObject.guppyInstance.asciimath();
        this.isCurrentAnswerValid();
      }
      if (!focusObj.focused) {
        this.isCurrentAnswerValid();
      }
    });
    Guppy.event('focus', (focusObj: FocusObj) => {
      if (!focusObj.focused) {
        this.isCurrentAnswerValid();
      }
    });
  }

  isCurrentAnswerValid(): boolean {
    if (this.currentValue === undefined) {
      this.currentValue = '';
    }
    // Replacing abs symbol, '|x|', with text, 'abs(x)' since the symbol
    // is not compatible with nerdamer or with the backend validations.
    this.currentValue = this.mathInteractionsService.replaceAbsSymbolWithText(
      this.currentValue
    );
    var answerIsValid = this.mathInteractionsService.validateEquation(
      this.currentValue,
      this.guppyInitializationService.getAllowedVariables()
    );
    if (this.guppyInitializationService.findActiveGuppyObject() === undefined) {
      // The warnings should only be displayed when the editor is inactive
      // focus, i.e., the user is done typing.
      this.warningText = this.mathInteractionsService.getWarningText();
    } else {
      this.warningText = '';
    }
    if (answerIsValid) {
      let splitByEquals = this.currentValue.split('=');
      splitByEquals[0] = this.mathInteractionsService.insertMultiplicationSigns(
        splitByEquals[0]
      );
      splitByEquals[1] = this.mathInteractionsService.insertMultiplicationSigns(
        splitByEquals[1]
      );
      this.currentValue = splitByEquals.join('=');
      this.value = this.currentValue;
      this.valueChanged.emit(this.value);
    }
    if (!this.hasBeenTouched) {
      this.warningText = '';
    }
    this.eventBusGroup.emit(
      new ObjectFormValidityChangeEvent({
        modalId: this.modalId,
        value: !answerIsValid,
      })
    );
    return answerIsValid;
  }

  showOSK(): void {
    this.guppyInitializationService.setShowOSK(true);
    GuppyInitializationService.interactionType = 'MathEquationInput';
  }

  ngOnDestroy(): void {
    this.eventBusGroup.unsubscribe();
  }
}