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feat(mermaid): restore pan & zoom when changing chart

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Elian Doran 2025-03-18 20:35:47 +02:00
parent eeb88ea559
commit b66677720d
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1 changed files with 50 additions and 16 deletions
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66
src/public/app/widgets/mermaid.ts
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@ -54,6 +54,7 @@ export default class MermaidWidget extends NoteContextAwareWidget {
private zoomHandler?: () => void;
private zoomInstance?: SvgPanZoom.Instance;
private splitInstance?: Split.Instance;
private lastNote?: FNote;
isEnabled() {
return super.isEnabled() && this.note?.type === "mermaid" && this.note.isContentAvailable() && this.noteContext?.viewScope?.viewMode === "default";
@ -107,28 +108,17 @@ export default class MermaidWidget extends NoteContextAwareWidget {
$svg.attr("width", "100%").attr("height", "100%");
// Enable pan to zoom.
import("svg-pan-zoom").then(svgPanZoom => {
const zoom = svgPanZoom.default($svg[0], {
zoomEnabled: true,
controlIconsEnabled: true,
fit: true,
center: true
});
this.zoomHandler = () => {
zoom.resize();
zoom.fit();
zoom.center();
};
$(window).on("resize", this.zoomHandler);
});
const isSameNote = (this.lastNote === note);
this.#setupPanZoom($svg[0], isSameNote);
} catch (e: any) {
console.warn(e);
this.#cleanUpZoom();
this.$errorMessage.text(e.message);
this.$errorContainer.show();
}
this.#setupResizer();
this.lastNote = note;
}
cleanup() {
@ -137,7 +127,13 @@ export default class MermaidWidget extends NoteContextAwareWidget {
$(window).off("resize", this.zoomHandler);
this.zoomHandler = undefined;
}
this.zoomInstance?.destroy();
}
#cleanUpZoom() {
if (this.zoomInstance) {
this.zoomInstance.destroy();
this.zoomInstance = undefined;
}
}
toggleInt(show: boolean | null | undefined): void {
@ -163,6 +159,44 @@ export default class MermaidWidget extends NoteContextAwareWidget {
return postprocessMermaidSvg(svg);
}
async #setupPanZoom(svgEl: SVGElement, isSameNote: boolean) {
// Clean up
let pan = null;
let zoom = null;
if (this.zoomInstance) {
// Store pan and zoom for same note, when the user is editing the note.
if (isSameNote && this.zoomInstance) {
pan = this.zoomInstance.getPan();
zoom = this.zoomInstance.getZoom();
}
this.#cleanUpZoom();
}
const svgPanZoom = (await import("svg-pan-zoom")).default;
const zoomInstance = svgPanZoom(svgEl, {
zoomEnabled: true,
controlIconsEnabled: true
});
if (pan && zoom) {
// Restore the pan and zoom.
zoomInstance.zoom(zoom);
zoomInstance.pan(pan);
} else {
// New instance, reposition properly.
zoomInstance.center();
zoomInstance.fit();
}
this.zoomHandler = () => {
zoomInstance.resize();
zoomInstance.fit();
zoomInstance.center();
};
this.zoomInstance = zoomInstance;
$(window).on("resize", this.zoomHandler);
}
#setupResizer() {
if (!utils.isDesktop()) {
return;