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Add word wrap for multi-line headless nodes #9

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Add word wrap for multi-line headless nodes #9

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28 changes: 25 additions & 3 deletions src/controls/nodes/headless-node-control.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -21,10 +21,24 @@ export class HeadlessNodeControl extends NodeControl {

override initialize() {
if(this.node.title) {
const textWidth = this.measureText(Constants.NODE_MATHFUNC_TITLE_FONT, this.node.title).width + 32;
const lines = this.node.title.split('\n');
let maxWidth = 0;

// Find the widest line
for (const line of lines) {
const lineWidth = this.measureText(Constants.NODE_MATHFUNC_TITLE_FONT, line).width;
maxWidth = Math.max(maxWidth, lineWidth);
}

const textWidth = maxWidth + 32;
const textHeight = lines.length * 20 + 16; // 20px per line + padding

const spacer = new HorizontalSpacerControl(textWidth);
spacer.fillParentVertical = true;
this.pinPanel.insert(spacer, 1);

// Update minimum height for multiline text
this.minHeight = Math.max(32, textHeight);
}
}

Expand All @@ -44,8 +58,16 @@ export class HeadlessNodeControl extends NodeControl {
canvas
.font(Constants.NODE_MATHFUNC_TITLE_FONT)
.textAlign('center')
.fillStyle(Constants.NODE_MATHFUNC_TITLE_COLOR)
.fillText(this.node.title, this.size.x * 0.5, this.size.y * 0.5 + 8);
.fillStyle(Constants.NODE_MATHFUNC_TITLE_COLOR);

// Handle multiline text
const lines = this.node.title.split('\n');
const lineHeight = 20;
const startY = this.size.y * 0.5 + 8 - ((lines.length - 1) * lineHeight / 2);

for (let i = 0; i < lines.length; i++) {
canvas.fillText(lines[i], this.size.x * 0.5, startY + (i * lineHeight));
}
}


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