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fix: normalize chart spec in renderer

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Timothy
2026-05-01 15:36:09 -07:00
parent 12ffacccab
commit e6310f1243
1 changed files with 27 additions and 0 deletions
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tools/src/chart_tools/renderer.py
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@@ -273,13 +273,40 @@ async def _render_in_page(
// data points are missing (the 2026-05-01 "all data
// points are gone" bug). We don't need animation in
// a static PNG anyway.
//
// Force layout positions for title/legend/grid so the
// agent's spec can't collide with itself. Specifically:
// when the agent writes legend.top: "8%" assuming title
// is at top:0, but our theme puts title at top:28, the
// legend lands INSIDE the title (the 2026-05-01 overlap
// bug). We strip user-provided top values and compute
// based on whether title has subtext + legend exists.
// User's other fields (text, data, formatter, etc.)
// still win.
const userTitle = option.title || {};
const userLegend = option.legend;
const userGrid = option.grid || {};
const hasSubtext = !!(userTitle.subtext || userTitle.subtextStyle);
const titleTop = 20;
const legendTop = hasSubtext ? 72 : 56;
const gridTop = userLegend ? (hasSubtext ? 116 : 100)
: (hasSubtext ? 80 : 64);
const sanitized = Object.assign({}, option, {
animation: false,
animationDuration: 0,
animationDurationUpdate: 0,
animationEasing: 'linear',
animationEasingUpdate: 'linear',
title: Object.assign({left: 'center'}, userTitle, {top: titleTop}),
grid: Object.assign({
left: 56, right: 56, bottom: 56, containLabel: true,
}, userGrid, {top: gridTop}),
});
if (userLegend) {
sanitized.legend = Object.assign({
icon: 'roundRect', itemWidth: 12, itemHeight: 12, itemGap: 16,
}, userLegend, {top: legendTop});
}
// Signal "render complete" via window.__chartReady so
// the Python side knows when it's safe to screenshot.