tldraw/dist-esm/lib/tools/ZoomTool/childStates/ZoomQuick.mjs.map

A tiny little drawing editor.

{
  "version": 3,
  "sources": ["../../../../../src/lib/tools/ZoomTool/childStates/ZoomQuick.ts"],
  "sourcesContent": ["import { Box, StateNode, TLKeyboardEventInfo, TLPointerEventInfo, Vec, react } from '@tldraw/editor'\n\nexport class ZoomQuick extends StateNode {\n\tstatic override id = 'zoom_quick'\n\n\tinfo = {} as TLPointerEventInfo & { onInteractionEnd?: string }\n\n\tqzState = 'idle' as 'idle' | 'moving'\n\n\tinitialVpb = new Box()\n\tinitialPp = new Vec()\n\n\t/** The camera zoom right after the overview zoom-out in onEnter. */\n\toverviewZoom = 1\n\n\tcleanupZoomReactor() {\n\t\tvoid null\n\t}\n\n\tnextVpb = new Box()\n\n\toverride onEnter(info: TLPointerEventInfo & { onInteractionEnd: string }) {\n\t\tconst { editor } = this\n\t\tthis.info = info\n\t\tthis.qzState = 'idle'\n\n\t\tthis.initialVpb = editor.getViewportPageBounds()\n\t\tthis.initialPp = Vec.From(editor.inputs.getCurrentPagePoint())\n\n\t\teditor.setCursor({ type: 'zoom-in', rotation: 0 })\n\n\t\t// Find the union of the current viewport and all shapes on the page,\n\t\t// then compute the zoom needed to fit it while preserving cursor position.\n\t\tconst vpb = this.initialVpb\n\t\tconst pageBounds = editor.getCurrentPageBounds()\n\t\tconst commonBounds = pageBounds ? Box.Expand(vpb, pageBounds) : vpb.clone()\n\n\t\t// The cursor stays fixed on screen, so the viewport extends:\n\t\t//   left of cursor by sx/z, right by (vsb.w-sx)/z (in page units)\n\t\t// We need each side to reach the common bounds edge.\n\t\tconst vsb = editor.getViewportScreenBounds()\n\t\tconst sp = editor.inputs.getCurrentScreenPoint()\n\t\tconst sx = sp.x - vsb.x\n\t\tconst sy = sp.y - vsb.y\n\t\tconst { x: px, y: py } = this.initialPp\n\n\t\tconst dLeft = px - commonBounds.minX\n\t\tconst dRight = commonBounds.maxX - px\n\t\tconst dTop = py - commonBounds.minY\n\t\tconst dBottom = commonBounds.maxY - py\n\n\t\tlet targetZoom = editor.getCamera().z\n\t\tif (dLeft > 0) targetZoom = Math.min(targetZoom, sx / dLeft)\n\t\tif (dRight > 0) targetZoom = Math.min(targetZoom, (vsb.w - sx) / dRight)\n\t\tif (dTop > 0) targetZoom = Math.min(targetZoom, sy / dTop)\n\t\tif (dBottom > 0) targetZoom = Math.min(targetZoom, (vsb.h - sy) / dBottom)\n\n\t\t// Zoom out a little further to add breathing room for dragging\n\t\ttargetZoom *= 0.85\n\n\t\t// Make sure we're not less than the minimum zoom\n\t\ttargetZoom = Math.max(editor.getCameraOptions().zoomSteps[0], targetZoom)\n\t\tthis.overviewZoom = targetZoom\n\n\t\t// When preserving screen bounds, react to zoom changes to resize the brush.\n\t\t// Otherwise the brush keeps fixed page dimensions.\n\t\tif (editor.options.quickZoomPreservesScreenBounds) {\n\t\t\tthis.cleanupZoomReactor = react('zoom change in quick zoom', () => {\n\t\t\t\teditor.getZoomLevel()\n\t\t\t\tthis.updateBrush()\n\t\t\t})\n\t\t}\n\n\t\t// Set the camera \u2014 when the reactor is active it will update the brush automatically.\n\t\tconst { x: cx, y: cy, z: cz } = editor.getCamera()\n\t\tconst ratio = cz / targetZoom\n\t\teditor.setCamera(new Vec((cx + px) * ratio - px, (cy + py) * ratio - py, targetZoom))\n\n\t\tif (!editor.options.quickZoomPreservesScreenBounds) {\n\t\t\tthis.updateBrush()\n\t\t}\n\t}\n\n\toverride onExit() {\n\t\tthis.cleanupZoomReactor()\n\t\tthis.zoomToNewViewport()\n\t\tthis.editor.updateInstanceState({ zoomBrush: null })\n\t}\n\n\toverride onPointerUp() {\n\t\t// Exit the zoom tool entirely, returning to the original tool\n\t\tconst toolId = this.info.onInteractionEnd?.split('.')[0] ?? 'select'\n\t\tthis.editor.setCurrentTool(toolId)\n\t}\n\n\toverride onCancel() {\n\t\tthis.qzState = 'idle'\n\t\t// Exit the zoom tool entirely, returning to the original tool\n\t\tconst toolId = this.info.onInteractionEnd?.split('.')[0] ?? 'select'\n\t\tthis.editor.setCurrentTool(toolId)\n\t}\n\n\toverride onKeyUp(info: TLKeyboardEventInfo) {\n\t\tif (info.key === 'Shift') {\n\t\t\tthis.parent.transition('idle', this.info)\n\t\t}\n\t}\n\n\tprivate updateBrush() {\n\t\tconst { editor } = this\n\t\tconst nextVpb = this.getNextVpb()\n\t\tthis.nextVpb.setTo(nextVpb)\n\t\teditor.updateInstanceState({ zoomBrush: nextVpb.toJson() })\n\t}\n\n\tprivate zoomToNewViewport() {\n\t\tconst { editor } = this\n\t\tswitch (this.qzState) {\n\t\t\tcase 'idle':\n\t\t\t\t// return to original viewport\n\t\t\t\teditor.zoomToBounds(this.initialVpb, { inset: 0 })\n\t\t\t\tbreak\n\t\t\tcase 'moving':\n\t\t\t\t// zoom to the new viewport\n\t\t\t\teditor.zoomToBounds(this.nextVpb, { inset: 0 })\n\t\t\t\tbreak\n\t\t}\n\t}\n\n\toverride onPointerMove() {\n\t\tif (this.qzState !== 'moving') return\n\t\tthis.updateBrush()\n\t}\n\n\toverride onTick() {\n\t\tconst { editor } = this\n\n\t\t// If the user is idle but has moved their camera, transition to the moving state\n\t\tswitch (this.qzState) {\n\t\t\tcase 'idle': {\n\t\t\t\tconst zoomLevel = editor.getZoomLevel()\n\t\t\t\tif (\n\t\t\t\t\tVec.Dist2(editor.inputs.getCurrentPagePoint(), this.initialPp) * zoomLevel >\n\t\t\t\t\teditor.options.dragDistanceSquared / zoomLevel\n\t\t\t\t) {\n\t\t\t\t\tthis.qzState = 'moving'\n\t\t\t\t\tthis.updateBrush()\n\t\t\t\t}\n\t\t\t\tbreak\n\t\t\t}\n\t\t\tcase 'moving':\n\t\t\t\tbreak\n\t\t}\n\t}\n\n\tprivate getNextVpb() {\n\t\tconst { editor } = this\n\t\tlet w: number\n\t\tlet h: number\n\t\tif (editor.options.quickZoomPreservesScreenBounds) {\n\t\t\t// Scale the brush page dimensions so that its screen size stays constant\n\t\t\t// as the overview zoom changes. When the user zooms in on the overview,\n\t\t\t// the brush shrinks in page coords (higher target zoom); zooming out expands it.\n\t\t\tconst zoomRatio = this.overviewZoom / editor.getCamera().z\n\t\t\tw = this.initialVpb.w * zoomRatio\n\t\t\th = this.initialVpb.h * zoomRatio\n\t\t} else {\n\t\t\tw = this.initialVpb.w\n\t\t\th = this.initialVpb.h\n\t\t}\n\t\tconst { x, y } = editor.inputs.getCurrentPagePoint()\n\n\t\t// Normalize the offset on the current screen point within the current viewport screen bounds\n\t\tconst vsb = editor.getViewportScreenBounds()\n\t\tconst vsp = editor.inputs.getCurrentScreenPoint()\n\t\tconst { x: nx, y: ny } = new Vec((vsp.x - vsb.x) / vsb.w, (vsp.y - vsb.y) / vsb.h)\n\n\t\treturn new Box(x - nx * w, y - ny * h, w, h)\n\t}\n}\n"],
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}