537 lines
16 KiB
Svelte
537 lines
16 KiB
Svelte
<script lang="ts">
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import { getContext, onMount, tick } from "svelte";
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import { beginDraggingElement } from "@graphite/io-managers/drag";
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import { platformIsMac } from "@graphite/utility-functions/platform";
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import type { Editor } from "@graphite/wasm-communication/editor";
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import { defaultWidgetLayout, patchWidgetLayout, UpdateDocumentLayerDetails, UpdateDocumentLayerStructureJs, UpdateLayersPanelOptionsLayout } from "@graphite/wasm-communication/messages";
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import type { LayerClassification, LayerPanelEntry } from "@graphite/wasm-communication/messages";
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import LayoutCol from "@graphite/components/layout/LayoutCol.svelte";
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import LayoutRow from "@graphite/components/layout/LayoutRow.svelte";
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import IconButton from "@graphite/components/widgets/buttons/IconButton.svelte";
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import IconLabel from "@graphite/components/widgets/labels/IconLabel.svelte";
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import WidgetLayout from "@graphite/components/widgets/WidgetLayout.svelte";
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type LayerListingInfo = {
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folderIndex: number;
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bottomLayer: boolean;
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editingName: boolean;
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entry: LayerPanelEntry;
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};
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let list: LayoutCol | undefined;
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const RANGE_TO_INSERT_WITHIN_BOTTOM_FOLDER_NOT_ROOT = 20;
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const INSERT_MARK_OFFSET = 2;
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type DraggingData = {
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select?: () => void;
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insertParentId: bigint | undefined;
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insertDepth: number;
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insertIndex: number | undefined;
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highlightFolder: boolean;
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markerHeight: number;
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};
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const editor = getContext<Editor>("editor");
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// Layer data
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let layerCache = new Map<string, LayerPanelEntry>(); // TODO: replace with BigUint64Array as index
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let layers: LayerListingInfo[] = [];
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// Interactive dragging
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let draggable = true;
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let draggingData: undefined | DraggingData = undefined;
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let fakeHighlight: undefined | bigint = undefined;
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let dragInPanel = false;
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// Layouts
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let layersPanelOptionsLayout = defaultWidgetLayout();
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onMount(() => {
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editor.subscriptions.subscribeJsMessage(UpdateLayersPanelOptionsLayout, (updateLayersPanelOptionsLayout) => {
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patchWidgetLayout(layersPanelOptionsLayout, updateLayersPanelOptionsLayout);
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layersPanelOptionsLayout = layersPanelOptionsLayout;
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});
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editor.subscriptions.subscribeJsMessage(UpdateDocumentLayerStructureJs, (updateDocumentLayerStructure) => {
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rebuildLayerHierarchy(updateDocumentLayerStructure);
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});
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editor.subscriptions.subscribeJsMessage(UpdateDocumentLayerDetails, (updateDocumentLayerDetails) => {
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const targetLayer = updateDocumentLayerDetails.data;
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const targetId = targetLayer.id;
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updateLayerInTree(targetId, targetLayer);
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});
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});
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function toggleLayerVisibility(id: bigint) {
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editor.instance.toggleLayerVisibility(id);
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}
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function handleExpandArrowClick(id: bigint) {
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editor.instance.toggleLayerExpansion(id);
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}
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async function onEditLayerName(listing: LayerListingInfo) {
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if (listing.editingName) return;
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draggable = false;
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listing.editingName = true;
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layers = layers;
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await tick();
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const query = list?.div()?.querySelector("[data-text-input]:not([disabled])");
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const textInput = (query instanceof HTMLInputElement && query) || undefined;
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textInput?.select();
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}
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function onEditLayerNameChange(listing: LayerListingInfo, e: Event) {
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// Eliminate duplicate events
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if (!listing.editingName) return;
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draggable = true;
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listing.editingName = false;
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layers = layers;
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const name = (e.target instanceof HTMLInputElement && e.target.value) || "";
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editor.instance.setLayerName(listing.entry.id, name);
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listing.entry.name = name;
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}
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async function onEditLayerNameDeselect(listing: LayerListingInfo) {
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draggable = true;
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listing.editingName = false;
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layers = layers;
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// Set it back to the original name if the user didn't enter a new name
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if (document.activeElement instanceof HTMLInputElement) document.activeElement.value = listing.entry.name;
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// Deselect the text so it doesn't appear selected while the input field becomes disabled and styled to look like regular text
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window.getSelection()?.removeAllRanges();
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}
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function selectLayerWithModifiers(e: MouseEvent, listing: LayerListingInfo) {
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// Get the pressed state of the modifier keys
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const [ctrl, meta, shift, alt] = [e.ctrlKey, e.metaKey, e.shiftKey, e.altKey];
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// Get the state of the platform's accel key and its opposite platform's accel key
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const [accel, oppositeAccel] = platformIsMac() ? [meta, ctrl] : [ctrl, meta];
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// Select the layer only if the accel and/or shift keys are pressed
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if (!oppositeAccel && !alt) selectLayer(listing, accel, shift);
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e.stopPropagation();
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}
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function selectLayer(listing: LayerListingInfo, accel: boolean, shift: boolean) {
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// Don't select while we are entering text to rename the layer
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if (listing.editingName) return;
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editor.instance.selectLayer(listing.entry.id, accel, shift);
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}
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async function deselectAllLayers() {
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editor.instance.deselectAllLayers();
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}
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function isNestingLayer(layerClassification: LayerClassification) {
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return layerClassification === "Folder" || layerClassification === "Artboard";
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}
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function calculateDragIndex(tree: LayoutCol, clientY: number, select?: () => void): DraggingData {
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const treeChildren = tree.div()?.children;
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const treeOffset = tree.div()?.getBoundingClientRect().top;
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// Closest distance to the middle of the row along the Y axis
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let closest = Infinity;
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// Folder to insert into
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let insertParentId: bigint | undefined = undefined;
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let insertDepth = 0;
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// Insert index (starts at the end, essentially infinity)
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let insertIndex = undefined;
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// Whether you are inserting into a folder and should show the folder outline
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let highlightFolder = false;
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let markerHeight = 0;
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let previousHeight: number | undefined = undefined;
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if (treeChildren !== undefined && treeOffset !== undefined) {
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Array.from(treeChildren).forEach((treeChild, index) => {
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const indexAttribute = treeChild.getAttribute("data-index");
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if (!indexAttribute) return;
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const { folderIndex, entry: layer } = layers[parseInt(indexAttribute, 10)];
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const rect = treeChild.getBoundingClientRect();
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const position = rect.top + rect.height / 2;
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const distance = position - clientY;
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// Inserting above current row
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if (distance > 0 && distance < closest) {
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insertParentId = layer.parentId;
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insertDepth = layer.depth - 1;
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insertIndex = folderIndex;
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highlightFolder = false;
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closest = distance;
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markerHeight = previousHeight || treeOffset + INSERT_MARK_OFFSET;
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}
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// Inserting below current row
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else if (distance > -closest && distance > -RANGE_TO_INSERT_WITHIN_BOTTOM_FOLDER_NOT_ROOT && distance < 0) {
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if (isNestingLayer(layer.layerClassification)) {
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insertParentId = layer.id;
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insertDepth = layer.depth;
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insertIndex = 0;
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highlightFolder = true;
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} else {
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insertParentId = layer.parentId;
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insertDepth = layer.depth - 1;
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insertIndex = folderIndex + 1;
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highlightFolder = false;
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}
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closest = -distance;
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markerHeight = index === treeChildren.length - 1 ? rect.bottom - INSERT_MARK_OFFSET : rect.bottom;
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}
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// Inserting with no nesting at the end of the panel
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else if (closest === Infinity) {
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if (layer.parentId === undefined) insertIndex = folderIndex + 1;
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markerHeight = rect.bottom - INSERT_MARK_OFFSET;
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}
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previousHeight = rect.bottom;
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});
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}
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markerHeight -= treeOffset || 0;
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return {
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select,
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insertParentId,
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insertDepth,
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insertIndex,
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highlightFolder,
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markerHeight,
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};
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}
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async function dragStart(event: DragEvent, listing: LayerListingInfo) {
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const layer = listing.entry;
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dragInPanel = true;
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if (!layer.selected) {
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fakeHighlight = layer.id;
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}
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const select = () => {
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if (!layer.selected) selectLayer(listing, false, false);
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};
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const target = (event.target instanceof HTMLElement && event.target) || undefined;
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const closest = target?.closest("[data-layer]") || undefined;
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const draggingELement = (closest instanceof HTMLElement && closest) || undefined;
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if (draggingELement) beginDraggingElement(draggingELement);
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// Set style of cursor for drag
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if (event.dataTransfer) {
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event.dataTransfer.dropEffect = "move";
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event.dataTransfer.effectAllowed = "move";
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}
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if (list) draggingData = calculateDragIndex(list, event.clientY, select);
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}
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function updateInsertLine(event: DragEvent) {
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// Stop the drag from being shown as cancelled
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event.preventDefault();
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dragInPanel = true;
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if (list) draggingData = calculateDragIndex(list, event.clientY, draggingData?.select);
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}
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async function drop() {
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if (draggingData && dragInPanel) {
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const { select, insertParentId, insertIndex } = draggingData;
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select?.();
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editor.instance.moveLayerInTree(insertParentId, insertIndex);
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}
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draggingData = undefined;
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fakeHighlight = undefined;
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dragInPanel = false;
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}
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function rebuildLayerHierarchy(updateDocumentLayerStructure: UpdateDocumentLayerStructureJs) {
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const layerWithNameBeingEdited = layers.find((layer: LayerListingInfo) => layer.editingName);
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const layerIdWithNameBeingEdited = layerWithNameBeingEdited?.entry.id;
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// Clear the layer hierarchy before rebuilding it
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layers = [];
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// Build the new layer hierarchy
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const recurse = (folder: UpdateDocumentLayerStructureJs) => {
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folder.children.forEach((item, index) => {
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const mapping = layerCache.get(String(item.layerId));
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if (mapping) {
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mapping.id = item.layerId;
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layers.push({
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folderIndex: index,
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bottomLayer: index === folder.children.length - 1,
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entry: mapping,
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editingName: layerIdWithNameBeingEdited === item.layerId,
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});
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}
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// Call self recursively if there are any children
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if (item.children.length >= 1) recurse(item);
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});
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};
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recurse(updateDocumentLayerStructure);
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layers = layers;
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}
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function updateLayerInTree(targetId: bigint, targetLayer: LayerPanelEntry) {
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layerCache.set(String(targetId), targetLayer);
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const layer = layers.find((layer: LayerListingInfo) => layer.entry.id === targetId);
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if (layer) {
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layer.entry = targetLayer;
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layers = layers;
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}
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}
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</script>
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<LayoutCol class="layers" on:dragleave={() => (dragInPanel = false)}>
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<LayoutRow class="options-bar" scrollableX={true}>
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<WidgetLayout layout={layersPanelOptionsLayout} />
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</LayoutRow>
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<LayoutRow class="list-area" scrollableY={true}>
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<LayoutCol class="list" bind:this={list} on:click={() => deselectAllLayers()} on:dragover={(e) => draggable && updateInsertLine(e)} on:dragend={() => draggable && drop()}>
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{#each layers as listing, index (String(listing.entry.id))}
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<LayoutRow
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class="layer"
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classes={{
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selected: fakeHighlight !== undefined ? fakeHighlight === listing.entry.id : listing.entry.selected,
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"insert-folder": (draggingData?.highlightFolder || false) && draggingData?.insertParentId === listing.entry.id,
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}}
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styles={{ "--layer-indent-levels": `${listing.entry.depth - 1}` }}
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data-layer
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data-index={index}
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tooltip={listing.entry.tooltip}
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{draggable}
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on:dragstart={(e) => draggable && dragStart(e, listing)}
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on:click={(e) => selectLayerWithModifiers(e, listing)}
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>
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{#if isNestingLayer(listing.entry.layerClassification)}
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<button class="expand-arrow" class:expanded={listing.entry.expanded} on:click|stopPropagation={() => handleExpandArrowClick(listing.entry.id)} tabindex="0" />
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{#if listing.entry.layerClassification === "Artboard"}
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<IconLabel icon="Artboard" class={"layer-type-icon"} />
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{:else if listing.entry.layerClassification === "Folder"}
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<IconLabel icon="Folder" class={"layer-type-icon"} />
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{/if}
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{:else}
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<div class="thumbnail">
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{@html listing.entry.thumbnail}
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</div>
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{/if}
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<LayoutRow class="layer-name" on:dblclick={() => onEditLayerName(listing)}>
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<input
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data-text-input
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type="text"
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value={listing.entry.name}
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placeholder={listing.entry.layerClassification}
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disabled={!listing.editingName}
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on:blur={() => onEditLayerNameDeselect(listing)}
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on:keydown={(e) => e.key === "Escape" && onEditLayerNameDeselect(listing)}
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on:keydown={(e) => e.key === "Enter" && onEditLayerNameChange(listing, e)}
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on:change={(e) => onEditLayerNameChange(listing, e)}
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/>
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</LayoutRow>
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<IconButton
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class={"visibility"}
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action={(e) => (toggleLayerVisibility(listing.entry.id), e?.stopPropagation())}
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size={24}
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icon={(() => true)() ? "EyeVisible" : "EyeHidden"}
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tooltip={(() => true)() ? "Visible" : "Hidden"}
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/>
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</LayoutRow>
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{/each}
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</LayoutCol>
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{#if draggingData && !draggingData.highlightFolder && dragInPanel}
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<div class="insert-mark" style:left={`${4 + draggingData.insertDepth * 16}px`} style:top={`${draggingData.markerHeight}px`} />
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{/if}
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</LayoutRow>
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</LayoutCol>
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<style lang="scss" global>
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.layers {
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// Options bar
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.options-bar {
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height: 32px;
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flex: 0 0 auto;
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margin: 0 4px;
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.widget-span {
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width: 100%;
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height: 100%;
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min-width: 300px;
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}
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// Blend mode selector
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.dropdown-input {
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max-width: 120px;
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}
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// Blend mode selector and opacity slider
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.dropdown-input,
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.number-input {
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flex: 1 1 auto;
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}
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}
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// Layer hierarchy
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.list-area {
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margin: 4px 0;
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position: relative;
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.layer {
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flex: 0 0 auto;
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align-items: center;
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position: relative;
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height: 32px;
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margin: 0 4px;
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padding-left: calc(4px + var(--layer-indent-levels) * 16px);
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border-bottom: 1px solid var(--color-2-mildblack);
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border-radius: 2px;
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&.selected {
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background: var(--color-4-dimgray);
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}
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&.insert-folder {
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outline: 3px solid var(--color-e-nearwhite);
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outline-offset: -3px;
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}
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.expand-arrow {
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padding: 0;
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margin: 0;
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width: 16px;
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height: 100%;
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border: none;
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position: relative;
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background: none;
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flex: 0 0 auto;
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display: flex;
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align-items: center;
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justify-content: center;
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border-radius: 2px;
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&:hover {
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background: var(--color-5-dullgray);
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}
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&::after {
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content: "";
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position: absolute;
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width: 0;
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height: 0;
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border-style: solid;
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border-width: 3px 0 3px 6px;
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border-color: transparent transparent transparent var(--color-e-nearwhite);
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}
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&.expanded::after {
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border-width: 6px 3px 0 3px;
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border-color: var(--color-e-nearwhite) transparent transparent transparent;
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}
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}
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.layer-type-icon {
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flex: 0 0 auto;
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margin-left: 4px;
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}
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.thumbnail {
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width: 36px;
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height: 24px;
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background: white;
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border-radius: 2px;
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flex: 0 0 auto;
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svg {
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width: calc(100% - 4px);
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height: calc(100% - 4px);
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margin: 2px;
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}
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}
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.layer-name {
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flex: 1 1 100%;
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margin: 0 8px;
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input {
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color: inherit;
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background: none;
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border: none;
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outline: none; // Ok for input element
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margin: 0;
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padding: 0;
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text-overflow: ellipsis;
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white-space: nowrap;
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overflow: hidden;
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border-radius: 2px;
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height: 24px;
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width: 100%;
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&:disabled {
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-webkit-user-select: none; // Required as of Safari 15.0 (Graphite's minimum version) through the latest release
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user-select: none;
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// Workaround for `user-select: none` not working on <input> elements
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pointer-events: none;
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}
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&:focus {
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background: var(--color-1-nearblack);
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padding: 0 4px;
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&::placeholder {
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opacity: 0.5;
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}
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}
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&::placeholder {
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opacity: 1;
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color: inherit;
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}
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}
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}
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.visibility {
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flex: 0 0 auto;
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align-items: center;
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height: 100%;
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.icon-button {
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height: 100%;
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width: calc(24px + 2 * 4px);
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}
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}
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}
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.insert-mark {
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position: absolute;
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left: 4px;
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right: 4px;
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background: var(--color-e-nearwhite);
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margin-top: -3px;
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height: 5px;
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z-index: 1;
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pointer-events: none;
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}
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}
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}
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</style>
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