mirror of
https://github.com/getcompanion-ai/co-mono.git
synced 2026-04-16 15:02:32 +00:00
feat(tui): add sticky column for vertical cursor navigation (#1120)
When moving up/down through lines of varying lengths, the editor now remembers the original column position and restores it when reaching a line long enough to accommodate it. Example: cursor at column 10, move up to a shorter line (cursor clamps to end), move up again to a longer line - cursor returns to column 10. Implementation: - Add preferredVisualCol instance property (nullable) - Set it when moving to a shorter line during vertical navigation - Clear it when arriving at a line that fits the preferred column - Clear it on any horizontal movement or editing via setCursorCol() - Detect line rewrap by checking if cursor is in middle of line - When pressing right at end of prompt, set preferredVisualCol so subsequent up/down navigation uses that column position
This commit is contained in:
Sviatoslav Abakumov
GitHub
parent
675136f009
commit
d075291b08
2 changed files with 592 additions and 68 deletions
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@ -199,6 +199,9 @@ export class Editor implements Component, Focusable {
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// Character jump mode
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private jumpMode: "forward" | "backward" | null = null;
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// Preferred visual column for vertical cursor movement (sticky column)
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private preferredVisualCol: number | null = null;
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// Undo support
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private undoStack: EditorState[] = [];
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@ -303,7 +306,7 @@ export class Editor implements Component, Focusable {
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const lines = text.replace(/\r\n/g, "\n").replace(/\r/g, "\n").split("\n");
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this.state.lines = lines.length === 0 ? [""] : lines;
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this.state.cursorLine = this.state.lines.length - 1;
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this.state.cursorCol = this.state.lines[this.state.cursorLine]?.length || 0;
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this.setCursorCol(this.state.lines[this.state.cursorLine]?.length || 0);
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// Reset scroll - render() will adjust to show cursor
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this.scrollOffset = 0;
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@ -523,7 +526,7 @@ export class Editor implements Component, Focusable {
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);
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this.state.lines = result.lines;
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this.state.cursorLine = result.cursorLine;
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this.state.cursorCol = result.cursorCol;
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this.setCursorCol(result.cursorCol);
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this.cancelAutocomplete();
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if (this.onChange) this.onChange(this.getText());
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}
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@ -544,7 +547,7 @@ export class Editor implements Component, Focusable {
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);
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this.state.lines = result.lines;
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this.state.cursorLine = result.cursorLine;
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this.state.cursorCol = result.cursorCol;
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this.setCursorCol(result.cursorCol);
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if (this.autocompletePrefix.startsWith("/")) {
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this.cancelAutocomplete();
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@ -890,7 +893,7 @@ export class Editor implements Component, Focusable {
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if (insertedLines.length === 1) {
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// Single line - insert at cursor position
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this.state.lines[this.state.cursorLine] = beforeCursor + normalized + afterCursor;
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this.state.cursorCol += normalized.length;
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this.setCursorCol(this.state.cursorCol + normalized.length);
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} else {
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// Multi-line insertion
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this.state.lines = [
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@ -911,7 +914,7 @@ export class Editor implements Component, Focusable {
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];
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this.state.cursorLine += insertedLines.length - 1;
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this.state.cursorCol = (insertedLines[insertedLines.length - 1] || "").length;
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this.setCursorCol((insertedLines[insertedLines.length - 1] || "").length);
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}
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if (this.onChange) {
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@ -941,7 +944,7 @@ export class Editor implements Component, Focusable {
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const after = line.slice(this.state.cursorCol);
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this.state.lines[this.state.cursorLine] = before + char + after;
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this.state.cursorCol += char.length; // Fix: increment by the length of the inserted string
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this.setCursorCol(this.state.cursorCol + char.length);
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if (this.onChange) {
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this.onChange(this.getText());
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@ -1058,7 +1061,7 @@ export class Editor implements Component, Focusable {
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// Move cursor to start of new line
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this.state.cursorLine++;
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this.state.cursorCol = 0;
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this.setCursorCol(0);
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if (this.onChange) {
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this.onChange(this.getText());
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@ -1085,7 +1088,7 @@ export class Editor implements Component, Focusable {
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const after = line.slice(this.state.cursorCol);
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this.state.lines[this.state.cursorLine] = before + after;
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this.state.cursorCol -= graphemeLength;
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this.setCursorCol(this.state.cursorCol - graphemeLength);
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} else if (this.state.cursorLine > 0) {
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this.pushUndoSnapshot();
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@ -1097,7 +1100,7 @@ export class Editor implements Component, Focusable {
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this.state.lines.splice(this.state.cursorLine, 1);
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this.state.cursorLine--;
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this.state.cursorCol = previousLine.length;
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this.setCursorCol(previousLine.length);
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}
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if (this.onChange) {
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@ -1122,15 +1125,117 @@ export class Editor implements Component, Focusable {
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}
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}
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/**
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* Set cursor column and clear preferredVisualCol.
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* Use this for all non-vertical cursor movements to reset sticky column behavior.
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*/
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private setCursorCol(col: number): void {
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this.state.cursorCol = col;
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this.preferredVisualCol = null;
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}
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/**
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* Move cursor to a target visual line, applying sticky column logic.
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* Shared by moveCursor() and pageScroll().
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*/
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private moveToVisualLine(
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visualLines: Array<{ logicalLine: number; startCol: number; length: number }>,
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currentVisualLine: number,
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targetVisualLine: number,
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): void {
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const currentVL = visualLines[currentVisualLine];
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const targetVL = visualLines[targetVisualLine];
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if (currentVL && targetVL) {
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const currentVisualCol = this.state.cursorCol - currentVL.startCol;
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// For non-last segments, clamp to length-1 to stay within the segment
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const isLastSourceSegment =
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currentVisualLine === visualLines.length - 1 ||
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visualLines[currentVisualLine + 1]?.logicalLine !== currentVL.logicalLine;
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const sourceMaxVisualCol = isLastSourceSegment ? currentVL.length : Math.max(0, currentVL.length - 1);
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const isLastTargetSegment =
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targetVisualLine === visualLines.length - 1 ||
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visualLines[targetVisualLine + 1]?.logicalLine !== targetVL.logicalLine;
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const targetMaxVisualCol = isLastTargetSegment ? targetVL.length : Math.max(0, targetVL.length - 1);
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const moveToVisualCol = this.computeVerticalMoveColumn(
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currentVisualCol,
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sourceMaxVisualCol,
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targetMaxVisualCol,
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);
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// Set cursor position
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this.state.cursorLine = targetVL.logicalLine;
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const targetCol = targetVL.startCol + moveToVisualCol;
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const logicalLine = this.state.lines[targetVL.logicalLine] || "";
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this.state.cursorCol = Math.min(targetCol, logicalLine.length);
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}
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}
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/**
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* Compute the target visual column for vertical cursor movement.
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* Implements the sticky column decision table:
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*
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* | P | S | T | U | Scenario | Set Preferred | Move To |
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* |---|---|---|---| ---------------------------------------------------- |---------------|-------------|
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* | 0 | * | 0 | - | Start nav, target fits | null | current |
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* | 0 | * | 1 | - | Start nav, target shorter | current | target end |
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* | 1 | 0 | 0 | 0 | Clamped, target fits preferred | null | preferred |
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* | 1 | 0 | 0 | 1 | Clamped, target longer but still can't fit preferred | keep | target end |
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* | 1 | 0 | 1 | - | Clamped, target even shorter | keep | target end |
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* | 1 | 1 | 0 | - | Rewrapped, target fits current | null | current |
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* | 1 | 1 | 1 | - | Rewrapped, target shorter than current | current | target end |
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*
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* Where:
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* - P = preferred col is set
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* - S = cursor in middle of source line (not clamped to end)
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* - T = target line shorter than current visual col
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* - U = target line shorter than preferred col
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*/
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private computeVerticalMoveColumn(
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currentVisualCol: number,
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sourceMaxVisualCol: number,
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targetMaxVisualCol: number,
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): number {
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const hasPreferred = this.preferredVisualCol !== null; // P
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const cursorInMiddle = currentVisualCol < sourceMaxVisualCol; // S
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const targetTooShort = targetMaxVisualCol < currentVisualCol; // T
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if (!hasPreferred || cursorInMiddle) {
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if (targetTooShort) {
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// Cases 2 and 7
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this.preferredVisualCol = currentVisualCol;
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return targetMaxVisualCol;
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}
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// Cases 1 and 6
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this.preferredVisualCol = null;
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return currentVisualCol;
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}
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const targetCantFitPreferred = targetMaxVisualCol < this.preferredVisualCol!; // U
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if (targetTooShort || targetCantFitPreferred) {
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// Cases 4 and 5
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return targetMaxVisualCol;
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}
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// Case 3
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const result = this.preferredVisualCol!;
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this.preferredVisualCol = null;
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return result;
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}
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private moveToLineStart(): void {
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this.lastAction = null;
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this.state.cursorCol = 0;
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this.setCursorCol(0);
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}
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private moveToLineEnd(): void {
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this.lastAction = null;
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const currentLine = this.state.lines[this.state.cursorLine] || "";
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this.state.cursorCol = currentLine.length;
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this.setCursorCol(currentLine.length);
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}
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private deleteToStartOfLine(): void {
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@ -1148,7 +1253,7 @@ export class Editor implements Component, Focusable {
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// Delete from start of line up to cursor
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this.state.lines[this.state.cursorLine] = currentLine.slice(this.state.cursorCol);
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this.state.cursorCol = 0;
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this.setCursorCol(0);
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} else if (this.state.cursorLine > 0) {
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this.pushUndoSnapshot();
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@ -1160,7 +1265,7 @@ export class Editor implements Component, Focusable {
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this.state.lines[this.state.cursorLine - 1] = previousLine + currentLine;
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this.state.lines.splice(this.state.cursorLine, 1);
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this.state.cursorLine--;
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this.state.cursorCol = previousLine.length;
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this.setCursorCol(previousLine.length);
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}
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if (this.onChange) {
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@ -1218,7 +1323,7 @@ export class Editor implements Component, Focusable {
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this.state.lines[this.state.cursorLine - 1] = previousLine + currentLine;
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this.state.lines.splice(this.state.cursorLine, 1);
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this.state.cursorLine--;
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this.state.cursorCol = previousLine.length;
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this.setCursorCol(previousLine.length);
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}
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} else {
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this.pushUndoSnapshot();
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@ -1229,7 +1334,7 @@ export class Editor implements Component, Focusable {
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const oldCursorCol = this.state.cursorCol;
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this.moveWordBackwards();
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const deleteFrom = this.state.cursorCol;
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this.state.cursorCol = oldCursorCol;
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this.setCursorCol(oldCursorCol);
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// Restore kill state for accumulation check, then save to kill ring
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this.lastAction = wasKill ? "kill" : null;
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@ -1239,7 +1344,7 @@ export class Editor implements Component, Focusable {
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this.state.lines[this.state.cursorLine] =
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currentLine.slice(0, deleteFrom) + currentLine.slice(this.state.cursorCol);
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this.state.cursorCol = deleteFrom;
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this.setCursorCol(deleteFrom);
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}
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if (this.onChange) {
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@ -1274,7 +1379,7 @@ export class Editor implements Component, Focusable {
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const oldCursorCol = this.state.cursorCol;
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this.moveWordForwards();
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const deleteTo = this.state.cursorCol;
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this.state.cursorCol = oldCursorCol;
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this.setCursorCol(oldCursorCol);
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// Restore kill state for accumulation check, then save to kill ring
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this.lastAction = wasKill ? "kill" : null;
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@ -1401,29 +1506,14 @@ export class Editor implements Component, Focusable {
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private moveCursor(deltaLine: number, deltaCol: number): void {
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this.lastAction = null;
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const width = this.lastWidth;
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const visualLines = this.buildVisualLineMap(this.lastWidth);
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const currentVisualLine = this.findCurrentVisualLine(visualLines);
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if (deltaLine !== 0) {
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// Build visual line map for navigation
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const visualLines = this.buildVisualLineMap(width);
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const currentVisualLine = this.findCurrentVisualLine(visualLines);
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// Calculate column position within current visual line
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const currentVL = visualLines[currentVisualLine];
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const visualCol = currentVL ? this.state.cursorCol - currentVL.startCol : 0;
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// Move to target visual line
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const targetVisualLine = currentVisualLine + deltaLine;
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if (targetVisualLine >= 0 && targetVisualLine < visualLines.length) {
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const targetVL = visualLines[targetVisualLine];
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if (targetVL) {
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this.state.cursorLine = targetVL.logicalLine;
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// Try to maintain visual column position, clamped to line length
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const targetCol = targetVL.startCol + Math.min(visualCol, targetVL.length);
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const logicalLine = this.state.lines[targetVL.logicalLine] || "";
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this.state.cursorCol = Math.min(targetCol, logicalLine.length);
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}
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this.moveToVisualLine(visualLines, currentVisualLine, targetVisualLine);
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}
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}
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@ -1436,11 +1526,17 @@ export class Editor implements Component, Focusable {
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const afterCursor = currentLine.slice(this.state.cursorCol);
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const graphemes = [...segmenter.segment(afterCursor)];
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const firstGrapheme = graphemes[0];
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this.state.cursorCol += firstGrapheme ? firstGrapheme.segment.length : 1;
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this.setCursorCol(this.state.cursorCol + (firstGrapheme ? firstGrapheme.segment.length : 1));
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} else if (this.state.cursorLine < this.state.lines.length - 1) {
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// Wrap to start of next logical line
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this.state.cursorLine++;
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this.state.cursorCol = 0;
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this.setCursorCol(0);
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} else {
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// At end of last line - can't move, but set preferredVisualCol for up/down navigation
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const currentVL = visualLines[currentVisualLine];
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if (currentVL) {
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this.preferredVisualCol = this.state.cursorCol - currentVL.startCol;
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}
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}
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} else {
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// Moving left - move by one grapheme (handles emojis, combining characters, etc.)
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@ -1448,12 +1544,12 @@ export class Editor implements Component, Focusable {
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const beforeCursor = currentLine.slice(0, this.state.cursorCol);
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const graphemes = [...segmenter.segment(beforeCursor)];
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const lastGrapheme = graphemes[graphemes.length - 1];
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this.state.cursorCol -= lastGrapheme ? lastGrapheme.segment.length : 1;
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this.setCursorCol(this.state.cursorCol - (lastGrapheme ? lastGrapheme.segment.length : 1));
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} else if (this.state.cursorLine > 0) {
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// Wrap to end of previous logical line
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this.state.cursorLine--;
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const prevLine = this.state.lines[this.state.cursorLine] || "";
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this.state.cursorCol = prevLine.length;
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this.setCursorCol(prevLine.length);
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}
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}
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}
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@ -1465,29 +1561,14 @@ export class Editor implements Component, Focusable {
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*/
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private pageScroll(direction: -1 | 1): void {
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this.lastAction = null;
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const width = this.lastWidth;
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const terminalRows = this.tui.terminal.rows;
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const pageSize = Math.max(5, Math.floor(terminalRows * 0.3));
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// Build visual line map
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const visualLines = this.buildVisualLineMap(width);
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const visualLines = this.buildVisualLineMap(this.lastWidth);
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const currentVisualLine = this.findCurrentVisualLine(visualLines);
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// Calculate target visual line
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const targetVisualLine = Math.max(0, Math.min(visualLines.length - 1, currentVisualLine + direction * pageSize));
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// Move cursor to target visual line
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const targetVL = visualLines[targetVisualLine];
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if (targetVL) {
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// Preserve column position within the line
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const currentVL = visualLines[currentVisualLine];
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const visualCol = currentVL ? this.state.cursorCol - currentVL.startCol : 0;
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this.state.cursorLine = targetVL.logicalLine;
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const targetCol = targetVL.startCol + Math.min(visualCol, targetVL.length);
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const logicalLine = this.state.lines[targetVL.logicalLine] || "";
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this.state.cursorCol = Math.min(targetCol, logicalLine.length);
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}
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this.moveToVisualLine(visualLines, currentVisualLine, targetVisualLine);
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}
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private moveWordBackwards(): void {
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@ -1499,7 +1580,7 @@ export class Editor implements Component, Focusable {
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if (this.state.cursorLine > 0) {
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this.state.cursorLine--;
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const prevLine = this.state.lines[this.state.cursorLine] || "";
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this.state.cursorCol = prevLine.length;
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this.setCursorCol(prevLine.length);
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}
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return;
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}
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@ -1532,7 +1613,7 @@ export class Editor implements Component, Focusable {
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}
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}
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this.state.cursorCol = newCol;
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this.setCursorCol(newCol);
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}
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/**
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@ -1586,7 +1667,7 @@ export class Editor implements Component, Focusable {
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const before = currentLine.slice(0, this.state.cursorCol);
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const after = currentLine.slice(this.state.cursorCol);
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this.state.lines[this.state.cursorLine] = before + text + after;
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this.state.cursorCol += text.length;
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this.setCursorCol(this.state.cursorCol + text.length);
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} else {
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// Multi-line insert
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const currentLine = this.state.lines[this.state.cursorLine] || "";
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@ -1607,7 +1688,7 @@ export class Editor implements Component, Focusable {
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// Update cursor position
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this.state.cursorLine = lastLineIndex;
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this.state.cursorCol = (lines[lines.length - 1] || "").length;
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this.setCursorCol((lines[lines.length - 1] || "").length);
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}
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if (this.onChange) {
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@ -1632,7 +1713,7 @@ export class Editor implements Component, Focusable {
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const before = currentLine.slice(0, this.state.cursorCol - deleteLen);
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const after = currentLine.slice(this.state.cursorCol);
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this.state.lines[this.state.cursorLine] = before + after;
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this.state.cursorCol -= deleteLen;
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this.setCursorCol(this.state.cursorCol - deleteLen);
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} else {
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// Multi-line delete - cursor is at end of last yanked line
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const startLine = this.state.cursorLine - (yankLines.length - 1);
|
||||
|
|
@ -1649,7 +1730,7 @@ export class Editor implements Component, Focusable {
|
|||
|
||||
// Update cursor
|
||||
this.state.cursorLine = startLine;
|
||||
this.state.cursorCol = startCol;
|
||||
this.setCursorCol(startCol);
|
||||
}
|
||||
|
||||
if (this.onChange) {
|
||||
|
|
@ -1698,6 +1779,7 @@ export class Editor implements Component, Focusable {
|
|||
const snapshot = this.undoStack.pop()!;
|
||||
this.restoreUndoSnapshot(snapshot);
|
||||
this.lastAction = null;
|
||||
this.preferredVisualCol = null;
|
||||
if (this.onChange) {
|
||||
this.onChange(this.getText());
|
||||
}
|
||||
|
|
@ -1730,7 +1812,7 @@ export class Editor implements Component, Focusable {
|
|||
|
||||
if (idx !== -1) {
|
||||
this.state.cursorLine = lineIdx;
|
||||
this.state.cursorCol = idx;
|
||||
this.setCursorCol(idx);
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
|
@ -1745,7 +1827,7 @@ export class Editor implements Component, Focusable {
|
|||
if (this.state.cursorCol >= currentLine.length) {
|
||||
if (this.state.cursorLine < this.state.lines.length - 1) {
|
||||
this.state.cursorLine++;
|
||||
this.state.cursorCol = 0;
|
||||
this.setCursorCol(0);
|
||||
}
|
||||
return;
|
||||
}
|
||||
|
|
@ -1754,10 +1836,11 @@ export class Editor implements Component, Focusable {
|
|||
const segments = segmenter.segment(textAfterCursor);
|
||||
const iterator = segments[Symbol.iterator]();
|
||||
let next = iterator.next();
|
||||
let newCol = this.state.cursorCol;
|
||||
|
||||
// Skip leading whitespace
|
||||
while (!next.done && isWhitespaceChar(next.value.segment)) {
|
||||
this.state.cursorCol += next.value.segment.length;
|
||||
newCol += next.value.segment.length;
|
||||
next = iterator.next();
|
||||
}
|
||||
|
||||
|
|
@ -1766,17 +1849,19 @@ export class Editor implements Component, Focusable {
|
|||
if (isPunctuationChar(firstGrapheme)) {
|
||||
// Skip punctuation run
|
||||
while (!next.done && isPunctuationChar(next.value.segment)) {
|
||||
this.state.cursorCol += next.value.segment.length;
|
||||
newCol += next.value.segment.length;
|
||||
next = iterator.next();
|
||||
}
|
||||
} else {
|
||||
// Skip word run
|
||||
while (!next.done && !isWhitespaceChar(next.value.segment) && !isPunctuationChar(next.value.segment)) {
|
||||
this.state.cursorCol += next.value.segment.length;
|
||||
newCol += next.value.segment.length;
|
||||
next = iterator.next();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
this.setCursorCol(newCol);
|
||||
}
|
||||
|
||||
// Slash menu only allowed when all other lines are empty (no mixed content)
|
||||
|
|
@ -1886,7 +1971,7 @@ https://github.com/EsotericSoftware/spine-runtimes/actions/runs/19536643416/job/
|
|||
);
|
||||
this.state.lines = result.lines;
|
||||
this.state.cursorLine = result.cursorLine;
|
||||
this.state.cursorCol = result.cursorCol;
|
||||
this.setCursorCol(result.cursorCol);
|
||||
if (this.onChange) this.onChange(this.getText());
|
||||
return;
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue