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main.ts
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main.ts
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import { Plugin, Notice} from 'obsidian';
import { getAPI } from 'obsidian-dataview';
import { ObsidianRenderer, ObsidianLink, LinkPair} from 'types';
import { LinkManager } from 'linkManager';
export default class GraphLinkTypesPlugin extends Plugin {
api = getAPI();
currentRenderer: ObsidianRenderer | null = null;
animationFrameId: number | null = null;
linkManager = new LinkManager();
// Lifecycle method called when the plugin is loaded
async onload(): Promise<void> {
// Check if the Dataview API is available
if (!this.api) {
console.error("Dataview plugin is not available.");
return;
}
// Handle layout changes
this.registerEvent(this.app.workspace.on('layout-change', () => {
this.handleLayoutChange();
}));
this.registerEvent(this.app.metadataCache.on("dataview:index-ready", () => {
console.log("Index ready, drawing graph link types.");
this.handleLayoutChange();
}));
this.registerEvent(this.app.metadataCache.on("dataview:metadata-change", () => {
console.log("New metadata, drawing graph link types.");
this.handleLayoutChange();
}));
// // Add a command to the command palette
// this.addCommand({
// id: 'print-link-type',
// name: 'Print Link Type',
// callback: () => {
// this.toyLinks();
// }
// });
}
// Find the first valid graph renderer in the workspace
findRenderer(): ObsidianRenderer | null {
let graphLeaves = this.app.workspace.getLeavesOfType('graph');
for (const leaf of graphLeaves) {
const renderer = leaf.view.renderer;
if (this.isObsidianRenderer(renderer)) {
return renderer;
}
}
graphLeaves = this.app.workspace.getLeavesOfType('localgraph');
for (const leaf of graphLeaves) {
const renderer = leaf.view.renderer;
if (this.isObsidianRenderer(renderer)) {
return renderer;
}
}
return null;
}
async handleLayoutChange() {
// Cancel the animation frame on layout change
if (this.animationFrameId !== null) {
cancelAnimationFrame(this.animationFrameId);
this.animationFrameId = null;
}
await this.waitForRenderer();
this.checkAndUpdateRenderer();
}
checkAndUpdateRenderer() {
const newRenderer = this.findRenderer();
if (!newRenderer) {
this.currentRenderer = null;
return;
}
this.currentRenderer = newRenderer;
this.startUpdateLoop();
}
waitForRenderer(): Promise<void> {
return new Promise((resolve) => {
const checkInterval = 500; // Interval in milliseconds to check for the renderer
const intervalId = setInterval(() => {
const renderer = this.findRenderer();
if (renderer) {
clearInterval(intervalId);
resolve();
}
}, checkInterval);
});
}
// Function to start the update loop for rendering.
startUpdateLoop(verbosity: number = 0): void {
if (!this.currentRenderer) {
if (verbosity > 0) {
new Notice('No valid graph renderer found.');
}
return;
}
const renderer : ObsidianRenderer = this.currentRenderer;
// Remove existing text from the graph.
this.linkManager.destroyMap(renderer);
// Call the function to update positions in the next animation frame.
requestAnimationFrame(this.updatePositions.bind(this));
}
// Function to continuously update the positions of text objects.
updatePositions(): void {
// Find the graph renderer in the workspace.
if (!this.currentRenderer) {
return;
}
const renderer: ObsidianRenderer = this.currentRenderer;
let updateMap = false;
if (this.animationFrameId && this.animationFrameId % 20 == 0) {
updateMap = true;
// Update link manager with the current frame's links
this.linkManager.removeLinks(renderer, renderer.links);
}
// For each link in the graph, update the position of its text.
renderer.links.forEach((link: ObsidianLink) => {
if (updateMap) {
const key = this.linkManager.generateKey(link.source.id, link.target.id);
if (!this.linkManager.linksMap.has(key)) {
console.log("Adding link.")
this.linkManager.addLink(renderer, link);
}
}
this.linkManager.updateTextPosition(renderer, link);
});
// Continue updating positions in the next animation frame.
this.animationFrameId = requestAnimationFrame(this.updatePositions.bind(this));
}
private isObsidianRenderer(renderer: any): renderer is ObsidianRenderer {
return renderer
&& renderer.px
&& renderer.px.stage
&& renderer.panX
&& renderer.panY
&& typeof renderer.px.stage.addChild === 'function'
&& typeof renderer.px.stage.removeChild === 'function'
&& Array.isArray(renderer.links);
}
}