Size the canvas grid to the active page
Each grid cell is now the active page's size, aligned to its edges, so the grid marks where neighbouring pages would sit. Falls back to A4 at the origin when no page is active. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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1 changed files with 6 additions and 7 deletions
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@ -28,11 +28,11 @@
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let stage: HTMLDivElement;
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const cssVars = pageCssVars();
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// Background grid: world-anchored, stepping up ×4 when zoomed out so lines never get denser than ~12px.
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const gridStep = $derived.by(() => {
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let step = 24 * viewport.scale;
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while (step < 12) step *= 4;
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return step;
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// Background grid: one cell per active page, aligned to its edges (A4 at the origin if none).
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const grid = $derived.by(() => {
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const r = (doc.activeId && doc.rects.get(doc.activeId)) || { x: 0, y: 0, ...A4 };
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const s = viewport.scale;
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return { w: r.width * s, h: r.height * s, x: viewport.x + r.x * s, y: viewport.y + r.y * s };
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});
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// ---- autosave --------------------------------------------------------
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@ -529,7 +529,7 @@
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class:panning
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class:erasing={tools.tool === 'eraser'}
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bind:this={stage}
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style="--grid: {gridStep}px; background-position: {viewport.x}px {viewport.y}px"
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style="background-size: {grid.w}px {grid.h}px; background-position: {grid.x}px {grid.y}px"
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onpointerdown={onPointerDown}
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onpointermove={onPointerMove}
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onpointerup={onPointerUp}
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@ -672,7 +672,6 @@
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background-image:
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linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
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linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
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background-size: var(--grid) var(--grid);
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}
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.stage :global(.cm-content) {
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user-select: text;
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