huly-platform/plugins/text-editor-resources/src/components/DrawingBoardEditor.svelte

<!--
// Copyright © 2024 Hardcore Engineering Inc.
//
// Licensed under the Eclipse Public 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 https://www.eclipse.org/legal/epl-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.
-->
<script lang="ts">
  import { DrawingBoardToolbar, DrawingCmd, DrawingTool, DrawTextCmd, drawing } from '@hcengineering/presentation'
  import { Loading } from '@hcengineering/ui'
  import { onMount, onDestroy } from 'svelte'
  import { Array as YArray, Map as YMap } from 'yjs'

  export let savedCmds: YArray<DrawingCmd>
  export let savedProps: YMap<any>
  export let grabFocus = false
  export let resizeable = false
  export let height: number | undefined = undefined
  export let readonly = false
  export let selected = false
  export let loading = false

  let tool: DrawingTool
  let penColor: string
  let penWidth: number
  let eraserWidth: number
  let fontSize: number
  let commands: DrawingCmd[] = []
  let offset: { x: number, y: number } = { x: 0, y: 0 }
  let changingCmdIndex: number | undefined
  let toolbar: HTMLDivElement
  let oldSelected = false

  $: onSelectedChanged(selected)

  function listenSavedCommands (): void {
    commands = savedCmds.toArray()
  }

  function listenSavedProps (): void {
    // We have only local offset for now
    // A global offset should be implemented as a "Follow" feature
    // offset = savedProps.get('offset')
  }

  function showCommandProps (index: number): void {
    changingCmdIndex = index
    const anyCmd = commands[index]
    if (anyCmd?.type === 'text') {
      const cmd = anyCmd as DrawTextCmd
      penColor = cmd.color
      fontSize = cmd.fontSize
    }
  }

  function onSelectedChanged (selected: boolean): void {
    if (oldSelected !== selected) {
      if (oldSelected && !selected && changingCmdIndex !== undefined) {
        changingCmdIndex = undefined
      }
      oldSelected = selected
    }
  }

  onMount(() => {
    commands = savedCmds.toArray()
    // offset = savedProps.get('offset')
    savedCmds.observe(listenSavedCommands)
    savedProps.observe(listenSavedProps)
  })

  onDestroy(() => {
    savedCmds.unobserve(listenSavedCommands)
    savedProps.unobserve(listenSavedProps)
  })
</script>

{#if savedCmds !== undefined && savedProps !== undefined}
  {#if loading}
    <div
      class="board"
      class:selected
      style:flex-grow={resizeable ? undefined : '1'}
      style:height={resizeable ? `${height}px` : undefined}
    >
      <Loading />
      <slot />
    </div>
  {:else}
    <div
      class="board"
      class:selected
      style:flex-grow={resizeable ? undefined : '1'}
      style:height={resizeable ? `${height}px` : undefined}
      use:drawing={{
        readonly,
        autoSize: true,
        commands,
        offset,
        tool,
        penColor,
        penWidth,
        eraserWidth,
        fontSize,
        changingCmdIndex,
        cmdAdded: (cmd) => {
          savedCmds.push([cmd])
          changingCmdIndex = undefined
        },
        cmdChanging: showCommandProps,
        cmdChanged: (index, cmd) => {
          savedCmds.delete(index)
          savedCmds.insert(index, [cmd])
          changingCmdIndex = undefined
        },
        cmdUnchanged: () => {
          changingCmdIndex = undefined
        },
        cmdDeleted: (index) => {
          savedCmds.delete(index)
          changingCmdIndex = undefined
        },
        panned: (newOffset) => {
          offset = newOffset
          // savedProps.set('offset', offset)
        }
      }}
    >
      {#if grabFocus}
        <!-- grab focus from the editor -->
        <!-- svelte-ignore a11y-autofocus -->
        <input style:opacity="0" autoFocus />
      {/if}
      {#if !readonly}
        <DrawingBoardToolbar
          placeInside={true}
          showPanTool={true}
          bind:toolbar
          bind:tool
          bind:penColor
          bind:penWidth
          bind:eraserWidth
          bind:fontSize
          on:clear={() => {
            savedCmds.delete(0, savedCmds.length)
            offset = { x: 0, y: 0 }
            // savedProps.set('offset', { x: 0, y: 0 })
          }}
        />
      {/if}
      <slot />
    </div>
  {/if}
{/if}

<style lang="scss">
  .board {
    position: relative;
    width: 100%;
    background-color: var(--theme-navpanel-color);
    border: 1px solid var(--theme-navpanel-border);
    border-radius: var(--small-BorderRadius);

    &.selected {
      border: 1px solid var(--theme-editbox-focus-border);
    }
  }
</style>