init claude-code

ink/searchHighlight.ts

@@ -0,0 +1,93 @@
+import {
+  CellWidth,
+  cellAtIndex,
+  type Screen,
+  type StylePool,
+  setCellStyleId,
+} from './screen.js'
+
+/**
+ * Highlight all visible occurrences of `query` in the screen buffer by
+ * inverting cell styles (SGR 7). Post-render, same damage-tracking machinery
+ * as applySelectionOverlay — the diff picks up highlighted cells as ordinary
+ * changes, LogUpdate stays a pure diff engine.
+ *
+ * Case-insensitive. Handles wide characters (CJK, emoji) by building a
+ * col-of-char map per row — the Nth character isn't at col N when wide chars
+ * are present (each occupies 2 cells: head + SpacerTail).
+ *
+ * This ONLY inverts — there is no "current match" logic here. The yellow
+ * current-match overlay is handled separately by applyPositionedHighlight
+ * (render-to-screen.ts), which writes on top using positions scanned from
+ * the target message's DOM subtree.
+ *
+ * Returns true if any match was highlighted (damage gate — caller forces
+ * full-frame damage when true).
+ */
+export function applySearchHighlight(
+  screen: Screen,
+  query: string,
+  stylePool: StylePool,
+): boolean {
+  if (!query) return false
+  const lq = query.toLowerCase()
+  const qlen = lq.length
+  const w = screen.width
+  const noSelect = screen.noSelect
+  const height = screen.height
+
+  let applied = false
+  for (let row = 0; row < height; row++) {
+    const rowOff = row * w
+    // Build row text (already lowercased) + code-unit→cell-index map.
+    // Three skip conditions, all aligned with setCellStyleId /
+    // extractRowText (selection.ts):
+    //   - SpacerTail: 2nd cell of a wide char, no char of its own
+    //   - SpacerHead: end-of-line padding when a wide char wraps
+    //   - noSelect: gutters (⎿, line numbers) — same exclusion as
+    //     applySelectionOverlay. "Highlight what you see" still holds for
+    //     content; gutters aren't search targets.
+    // Lowercasing per-char (not on the joined string at the end) means
+    // codeUnitToCell maps positions in the LOWERCASED text — U+0130
+    // (Turkish İ) lowercases to 2 code units, so lowering the joined
+    // string would desync indexOf positions from the map.
+    let text = ''
+    const colOf: number[] = []
+    const codeUnitToCell: number[] = []
+    for (let col = 0; col < w; col++) {
+      const idx = rowOff + col
+      const cell = cellAtIndex(screen, idx)
+      if (
+        cell.width === CellWidth.SpacerTail ||
+        cell.width === CellWidth.SpacerHead ||
+        noSelect[idx] === 1
+      ) {
+        continue
+      }
+      const lc = cell.char.toLowerCase()
+      const cellIdx = colOf.length
+      for (let i = 0; i < lc.length; i++) {
+        codeUnitToCell.push(cellIdx)
+      }
+      text += lc
+      colOf.push(col)
+    }
+
+    let pos = text.indexOf(lq)
+    while (pos >= 0) {
+      applied = true
+      const startCi = codeUnitToCell[pos]!
+      const endCi = codeUnitToCell[pos + qlen - 1]!
+      for (let ci = startCi; ci <= endCi; ci++) {
+        const col = colOf[ci]!
+        const cell = cellAtIndex(screen, rowOff + col)
+        setCellStyleId(screen, col, row, stylePool.withInverse(cell.styleId))
+      }
+      // Non-overlapping advance (less/vim/grep/Ctrl+F). pos+1 would find
+      // 'aa' at 0 AND 1 in 'aaa' → double-invert cell 1.
+      pos = text.indexOf(lq, pos + qlen)
+    }
+  }
+
+  return applied
+}