Initial editor functionality

src/app/app-routing.module.ts

@@ -14,6 +14,10 @@ const routes: Routes = [
   {
     path: 'list',
     loadChildren: () => import('./list/list.module').then(m => m.ListPageModule)
+  },
+  {
+    path: 'editor',
+    loadChildren: () => import('./pages/editor/editor.module').then( m => m.EditorPageModule)
   }
 ];
 

src/app/app.component.ts

@@ -20,6 +20,11 @@ export class AppComponent {
       title: 'List',
       url: '/list',
       icon: 'list'
+    },
+    {
+      title: 'Editor',
+      url: '/editor',
+      icon: 'edit'
     }
   ];
 

src/app/app.module.ts

@@ -9,6 +9,7 @@ import { StatusBar } from '@ionic-native/status-bar/ngx';
 import { AppComponent } from './app.component';
 import { AppRoutingModule } from './app-routing.module';
 import {HttpClientModule} from '@angular/common/http';
+import {ComponentsModule} from './components/components.module';
 
 @NgModule({
   declarations: [AppComponent],
@@ -18,6 +19,7 @@ import {HttpClientModule} from '@angular/common/http';
     IonicModule.forRoot(),
     AppRoutingModule,
     HttpClientModule,
+    ComponentsModule,
   ],
   providers: [
     StatusBar,

src/app/components/components.module.ts

@@ -0,0 +1,15 @@
+import { NgModule } from '@angular/core';
+import { CommonModule } from '@angular/common';
+import {HostComponent} from './editor/host/host.component';
+
+@NgModule({
+  declarations: [HostComponent],
+  imports: [
+    CommonModule
+  ],
+  entryComponents: [HostComponent],
+  exports: [
+    HostComponent
+  ]
+})
+export class ComponentsModule { }

src/app/components/editor/host/host.component.html

@@ -0,0 +1,13 @@
+<ng-container>
+  <div
+    *ngIf="record.type === 'paragraph' || record.type === 'header1' || record.type === 'header2' || record.type === 'header3' || record.type === 'header4' || record.type === 'block_code'"
+    class="host-host ion-padding"
+    contenteditable="true"
+    (keyup)="onKeyUp($event)"
+    (blur)="record.value=hostContainer.innerText"
+    #hostContainer
+    [ngClass]="{'paragraph': record.type === 'paragraph', 'header1': record.type === 'header1', 'header2': record.type === 'header2', 'header3': record.type === 'header3', 'header4': record.type === 'header4', 'block_code': record.type === 'block_code'}"
+  >
+    {{ record.value }}
+  </div>
+</ng-container>

src/app/components/editor/host/host.component.scss

@@ -0,0 +1,26 @@
+.host-host.header1 {
+  font-weight: bold;
+  font-size: 24pt;
+}
+
+.host-host.header2 {
+  font-weight: bold;
+  font-size: 21pt;
+}
+
+.host-host.header3 {
+  font-weight: bold;
+  font-size: 18pt;
+}
+
+.host-host.header4 {
+  font-weight: bold;
+  font-size: 16pt;
+}
+
+.host-host.block_code {
+  font-family: monospace;
+  font-size: 12pt;
+  background-color: #ddd;
+  margin-bottom: 15px;
+}

src/app/components/editor/host/host.component.spec.ts

@@ -0,0 +1,24 @@
+import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+import { IonicModule } from '@ionic/angular';
+
+import { HostComponent } from './host.component';
+
+describe('HostComponent', () => {
+  let component: HostComponent;
+  let fixture: ComponentFixture<HostComponent>;
+
+  beforeEach(async(() => {
+    TestBed.configureTestingModule({
+      declarations: [ HostComponent ],
+      imports: [IonicModule.forRoot()]
+    }).compileComponents();
+
+    fixture = TestBed.createComponent(HostComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  }));
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

src/app/components/editor/host/host.component.ts

@@ -0,0 +1,48 @@
+import {Component, ElementRef, EventEmitter, Input, OnInit, Output, ViewChild} from '@angular/core';
+import HostRecord from '../../../structures/HostRecord';
+
+@Component({
+  selector: 'editor-host',
+  templateUrl: './host.component.html',
+  styleUrls: ['./host.component.scss'],
+})
+export class HostComponent implements OnInit {
+  @Input() record: HostRecord;
+  @Output() recordChange = new EventEmitter<HostRecord>();
+  @Output() newHostRequested = new EventEmitter<HostComponent>();
+  @Output() destroyHostRequested = new EventEmitter<HostComponent>();
+  @ViewChild('hostContainer', {static: false}) hostContainer: ElementRef;
+
+  constructor() { }
+
+  ngOnInit() {}
+
+  onKeyUp($event) {
+    const innerText = this.hostContainer.nativeElement.innerText.trim()
+    if ( $event.code === 'Enter'
+        && ( this.record.type !== 'block_code'
+        || (innerText.endsWith('```') && (innerText.match(/`/g) || []).length >= 6)
+        )
+    ) {
+      this.newHostRequested.emit(this);
+      this.hostContainer.nativeElement.innerText = this.hostContainer.nativeElement.innerText.trim();
+    } else if ( $event.code === 'Backspace' && !this.hostContainer.nativeElement.innerText.trim() ) {
+      this.destroyHostRequested.emit(this);
+    }
+
+    if ( innerText.startsWith('# ') ) {
+      this.record.type = 'header1';
+    } else if ( innerText.startsWith('## ') ) {
+      this.record.type = 'header2';
+    } else if ( innerText.startsWith('### ') ) {
+      this.record.type = 'header3';
+    } else if ( innerText.startsWith('#### ') ) {
+      this.record.type = 'header4';
+    } else if ( innerText.startsWith('```') ) {
+      this.record.type = 'block_code';
+    } else {
+      this.record.type = 'paragraph';
+    }
+  }
+
+}

src/app/components/editor/paragraph/paragraph.component.html

@@ -0,0 +1,3 @@
+<p>
+  paragraph works!
+</p>

src/app/components/editor/paragraph/paragraph.component.spec.ts

@@ -0,0 +1,24 @@
+import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+import { IonicModule } from '@ionic/angular';
+
+import { ParagraphComponent } from './paragraph.component';
+
+describe('ParagraphComponent', () => {
+  let component: ParagraphComponent;
+  let fixture: ComponentFixture<ParagraphComponent>;
+
+  beforeEach(async(() => {
+    TestBed.configureTestingModule({
+      declarations: [ ParagraphComponent ],
+      imports: [IonicModule.forRoot()]
+    }).compileComponents();
+
+    fixture = TestBed.createComponent(ParagraphComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  }));
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

src/app/components/editor/paragraph/paragraph.component.ts

@@ -0,0 +1,14 @@
+import { Component, OnInit } from '@angular/core';
+
+@Component({
+  selector: 'app-paragraph',
+  templateUrl: './paragraph.component.html',
+  styleUrls: ['./paragraph.component.scss'],
+})
+export class ParagraphComponent implements OnInit {
+
+  constructor() { }
+
+  ngOnInit() {}
+
+}

src/app/pages/editor/editor-routing.module.ts

@@ -0,0 +1,17 @@
+import { NgModule } from '@angular/core';
+import { Routes, RouterModule } from '@angular/router';
+
+import { EditorPage } from './editor.page';
+
+const routes: Routes = [
+  {
+    path: '',
+    component: EditorPage
+  }
+];
+
+@NgModule({
+  imports: [RouterModule.forChild(routes)],
+  exports: [RouterModule],
+})
+export class EditorPageRoutingModule {}

src/app/pages/editor/editor.module.ts

@@ -0,0 +1,22 @@
+import { NgModule } from '@angular/core';
+import { CommonModule } from '@angular/common';
+import { FormsModule } from '@angular/forms';
+
+import { IonicModule } from '@ionic/angular';
+
+import { EditorPageRoutingModule } from './editor-routing.module';
+
+import { EditorPage } from './editor.page';
+import {ComponentsModule} from '../../components/components.module';
+
+@NgModule({
+  imports: [
+    CommonModule,
+    FormsModule,
+    IonicModule,
+    EditorPageRoutingModule,
+    ComponentsModule
+  ],
+  declarations: [EditorPage]
+})
+export class EditorPageModule {}

src/app/pages/editor/editor.page.html

@@ -0,0 +1,26 @@
+<ion-header>
+  <ion-toolbar>
+    <ion-title>Note Editor</ion-title>
+  </ion-toolbar>
+</ion-header>
+
+<ion-content>
+  <ng-container>
+    <div class="editor-buttons">
+      <ion-button class="ion-padding ion-margin">Save</ion-button>
+    </div>
+    <div class="editor-root ion-padding">
+      Hello, world!
+
+      <div class="host-container ion-padding">
+        <editor-host
+          #editorHosts
+          *ngFor="let record of hostRecords"
+          [(record)]="record"
+          (newHostRequested)="onNewHostRequested($event)"
+          (destroyHostRequested)="onDestroyHostRequested($event)"
+        ></editor-host>
+      </div>
+    </div>
+  </ng-container>
+</ion-content>

src/app/pages/editor/editor.page.spec.ts

@@ -0,0 +1,24 @@
+import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+import { IonicModule } from '@ionic/angular';
+
+import { EditorPage } from './editor.page';
+
+describe('EditorPage', () => {
+  let component: EditorPage;
+  let fixture: ComponentFixture<EditorPage>;
+
+  beforeEach(async(() => {
+    TestBed.configureTestingModule({
+      declarations: [ EditorPage ],
+      imports: [IonicModule.forRoot()]
+    }).compileComponents();
+
+    fixture = TestBed.createComponent(EditorPage);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  }));
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

src/app/pages/editor/editor.page.ts

@@ -0,0 +1,90 @@
+import {Component, OnInit, ViewChildren} from '@angular/core';
+import HostRecord from '../../structures/HostRecord';
+
+@Component({
+  selector: 'app-editor',
+  templateUrl: './editor.page.html',
+  styleUrls: ['./editor.page.scss'],
+})
+export class EditorPage implements OnInit {
+  public hostRecords: Array<HostRecord> = [new HostRecord('I am a record.')];
+
+  @ViewChildren('editorHosts') editorHosts;
+
+  constructor() { }
+
+  ngOnInit() {
+    console.log('Editor component: ', this);
+  }
+
+  onNewHostRequested($event) {
+    const insertAfter = this.getIndexFromRecord($event.record);
+    const record = new HostRecord('');
+    const newHosts = []
+    this.hostRecords.forEach((rec, i) => {
+      newHosts.push(rec);
+      if ( i === insertAfter ) {
+        newHosts.push(record);
+      }
+    })
+
+    this.hostRecords = newHosts;
+
+    setTimeout(() => {
+      const host = this.editorHosts.toArray()[insertAfter + 1].hostContainer.nativeElement;
+      const s = window.getSelection();
+      const r = document.createRange();
+      r.setStart(host, 0);
+      r.setEnd(host, 0);
+      s.removeAllRanges();
+      s.addRange(r);
+    }, 0);
+
+  }
+
+  onDestroyHostRequested($event) {
+    let removedIndex = 0;
+    const newHostRecords = this.editorHosts.filter((host, i) => {
+      if ( $event.record === host.record ) {
+        removedIndex = i;
+      }
+      return host.record !== $event.record;
+    });
+
+    const removedHost = this.editorHosts[removedIndex];
+
+    const hostRecords = newHostRecords.map(host => host.record);
+    this.hostRecords = hostRecords;
+
+    setTimeout(() => {
+      let focusIndex;
+      if ( removedIndex === 0 && this.editorHosts.toArray().length ) {
+        focusIndex = 0;
+      } else if ( removedIndex !== 0 ) {
+        focusIndex = removedIndex - 1;
+      }
+
+      if ( focusIndex >= 0 ) {
+        const host = this.editorHosts.toArray()[focusIndex].hostContainer.nativeElement;
+        const s = window.getSelection();
+        const r = document.createRange();
+        r.setStart(host, 0);
+        r.setEnd(host, 0);
+        s.removeAllRanges();
+        s.addRange(r);
+      }
+    }, 0);
+  }
+
+  protected getIndexFromRecord(record) {
+    let index;
+    this.editorHosts.toArray().forEach((host, i) => {
+      if ( host.record === record ) {
+        index = i;
+      }
+    });
+
+    return index;
+  }
+
+}

src/app/structures/HostRecord.ts

@@ -0,0 +1,9 @@
+export default class HostRecord {
+    public value = '';
+
+    public type: 'paragraph'|'header1'|'header2'|'header3'|'header4'|'block_code' = 'paragraph';
+
+    constructor(value = '') {
+        this.value = value;
+    }
+}