UBERF-8180 Text file preview (#6633)

Signed-off-by: Alexander Onnikov <Alexander.Onnikov@xored.com>

plugins/view-resources/src/components/viewer/TextViewer.svelte

@@ -0,0 +1,72 @@
+<!--
+// 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 { type Blob, type Ref } from '@hcengineering/core'
+  import { getFileUrl } from '@hcengineering/presentation'
+  import { Loading, Scroller } from '@hcengineering/ui'
+
+  export let value: Ref<Blob>
+  export let name: string
+  export let fit: boolean = false
+
+  $: void fetchFile(value, name)
+
+  let loading = true
+  let text: string | undefined = undefined
+
+  async function fetchFile (value: Ref<Blob>, name: string): Promise<void> {
+    loading = true
+
+    const src = getFileUrl(value, name)
+    const res = await fetch(src)
+    text = await res.text()
+
+    loading = false
+  }
+</script>
+
+{#if loading}
+  <div class="flex-center w-full h-full clear-mins">
+    <Loading />
+  </div>
+{:else}
+  <div class="container h-full w-full" class:fit>
+    <Scroller horizontal padding="0 1rem">
+      <pre class="select-text">{text}</pre>
+    </Scroller>
+  </div>
+{/if}
+
+<style lang="scss">
+  .container {
+    max-height: 80vh;
+
+    overflow: hidden;
+    border: 1px solid var(--theme-button-border);
+    border-radius: 0.25rem;
+
+    &.fit {
+      min-height: 100%;
+    }
+    &:not(.fit) {
+      height: 80vh;
+      min-height: 20rem;
+    }
+  }
+
+  pre {
+    font-family: var(--mono-font);
+  }
+</style>