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fix(tui): reserve 1 column for cursor in word wrap width

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Sviatoslav Abakumov 2026-01-24 16:42:49 +04:00
parent 151099e17e
commit b5ab90f837
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2 changed files with 42 additions and 31 deletions
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45
packages/tui/src/components/editor.ts
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@ -306,13 +306,17 @@ export class Editor implements Component, Focusable {
const paddingX = Math.min(this.paddingX, maxPadding);
const contentWidth = Math.max(1, width - paddingX * 2);
// Store width for cursor navigation
this.lastWidth = contentWidth;
// Layout width: with padding the cursor can overflow into it,
// without padding we reserve 1 column for the cursor.
const layoutWidth = Math.max(1, contentWidth - (paddingX ? 0 : 1));
// Store for cursor navigation (must match wrapping width)
this.lastWidth = layoutWidth;
const horizontal = this.borderColor("─");
// Layout the text - use content width
const layoutLines = this.layoutText(contentWidth);
// Layout the text
const layoutLines = this.layoutText(layoutWidth);
// Calculate max visible lines: 30% of terminal height, minimum 5 lines
const terminalRows = this.tui.terminal.rows;
@ -356,6 +360,7 @@ export class Editor implements Component, Focusable {
for (const layoutLine of visibleLines) {
let displayText = layoutLine.text;
let lineVisibleWidth = visibleWidth(layoutLine.text);
let cursorInPadding = false;
// Add cursor if this line has it
if (layoutLine.hasCursor && layoutLine.cursorPos !== undefined) {
@ -375,37 +380,23 @@ export class Editor implements Component, Focusable {
displayText = before + marker + cursor + restAfter;
// lineVisibleWidth stays the same - we're replacing, not adding
} else {
// Cursor is at the end - check if we have room for the space
if (lineVisibleWidth < contentWidth) {
// We have room - add highlighted space
const cursor = "\x1b[7m \x1b[0m";
displayText = before + marker + cursor;
// lineVisibleWidth increases by 1 - we're adding a space
lineVisibleWidth = lineVisibleWidth + 1;
} else {
// Line is at full width - use reverse video on last grapheme if possible
// or just show cursor at the end without adding space
const beforeGraphemes = [...segmenter.segment(before)];
if (beforeGraphemes.length > 0) {
const lastGrapheme = beforeGraphemes[beforeGraphemes.length - 1]?.segment || "";
const cursor = `\x1b[7m${lastGrapheme}\x1b[0m`;
// Rebuild 'before' without the last grapheme
const beforeWithoutLast = beforeGraphemes
.slice(0, -1)
.map((g) => g.segment)
.join("");
displayText = beforeWithoutLast + marker + cursor;
}
// lineVisibleWidth stays the same
// Cursor is at the end - add highlighted space
const cursor = "\x1b[7m \x1b[0m";
displayText = before + marker + cursor;
lineVisibleWidth = lineVisibleWidth + 1;
// If cursor overflows content width into the padding, flag it
if (lineVisibleWidth > contentWidth && paddingX > 0) {
cursorInPadding = true;
}
}
}
// Calculate padding based on actual visible width
const padding = " ".repeat(Math.max(0, contentWidth - lineVisibleWidth));
const lineRightPadding = cursorInPadding ? rightPadding.slice(1) : rightPadding;
// Render the line (no side borders, just horizontal lines above and below)
result.push(`${leftPadding}${displayText}${padding}${rightPadding}`);
result.push(`${leftPadding}${displayText}${padding}${lineRightPadding}`);
}
// Render bottom border (with scroll indicator if more content below)