Disable implicit text wrapping

app/app.py

@@ -107,31 +107,18 @@ def object_box(obj: dict[str, Any], scale: float) -> tuple[int, int, int, int]:
     return x, y, max(1, w), max(1, h)
 
 
-def wrap_text(draw: ImageDraw.ImageDraw, text: str, font, max_width: int) -> list[str]:
-    lines: list[str] = []
-    for raw_line in text.splitlines() or [""]:
-        current = ""
-        for word in raw_line.split(" "):
-            candidate = word if not current else f"{current} {word}"
-            if draw.textbbox((0, 0), candidate, font=font)[2] <= max_width:
-                current = candidate
-                continue
-            if current:
-                lines.append(current)
-            current = word
-        if current:
-            lines.append(current)
-    return lines
+def text_lines(text: str) -> list[str]:
+    return text.split("\n")
 
 
-def draw_text(draw: ImageDraw.ImageDraw, obj: dict[str, Any], scale: float) -> None:
+def draw_text(image: Image.Image, draw: ImageDraw.ImageDraw, obj: dict[str, Any], scale: float) -> None:
     x, y, w, h = object_box(obj, scale)
     text = str(obj.get("text", "Text"))
     font_size = scaled_mm_to_px(float(obj.get("fontSizeMm", 5)), scale)
     font = get_font(font_size, bool(obj.get("bold", False)))
     align = obj.get("align", "left")
     valign = obj.get("valign", "middle")
-    lines = wrap_text(draw, text, font, w)
+    lines = text_lines(text)
     boxes = [draw.textbbox((0, 0), line, font=font) for line in lines]
     line_heights = [box[3] - box[1] for box in boxes]
     gap = max(1, round(font_size * 0.15))
@@ -150,7 +137,15 @@ def draw_text(draw: ImageDraw.ImageDraw, obj: dict[str, Any], scale: float) -> N
             cx = x + w - text_w
         else:
             cx = x
-        draw.text((cx, cy - box[1]), line, font=font, fill=1)
+        text_layer = Image.new("1", image.size, 0)
+        text_draw = ImageDraw.Draw(text_layer)
+        text_draw.text((cx, cy - box[1]), line, font=font, fill=1)
+        clip = Image.new("1", image.size, 0)
+        clip_draw = ImageDraw.Draw(clip)
+        clip_draw.rectangle([x, y, x + w, y + h], fill=1)
+        clipped = Image.new("1", image.size, 0)
+        clipped.paste(text_layer, mask=clip)
+        image.paste(1, mask=clipped)
         cy += line_h + gap
 
 
@@ -283,7 +278,7 @@ def render_design_image(design: dict[str, Any]) -> Image.Image:
             continue
         obj_type = obj.get("type")
         if obj_type == "text" or obj_type == "symbol":
-            draw_text(draw, obj, scale)
+            draw_text(image, draw, obj, scale)
         elif obj_type == "shape":
             draw_shape(draw, obj, scale)
         elif obj_type == "line":

app/static/editor.js

@@ -102,22 +102,8 @@ function clamp(value, min, max) {
   return Math.min(max, Math.max(min, value));
 }
 
-function wrapCanvasText(text, maxWidthPx) {
-  const lines = [];
-  for (const rawLine of String(text || "").split("\n")) {
-    let current = "";
-    for (const word of rawLine.split(" ")) {
-      const candidate = current ? `${current} ${word}` : word;
-      if (ctx.measureText(candidate).width <= maxWidthPx) {
-        current = candidate;
-        continue;
-      }
-      if (current) lines.push(current);
-      current = word;
-    }
-    lines.push(current);
-  }
-  return lines.length ? lines : [""];
+function canvasTextLines(text) {
+  return String(text || "").split("\n");
 }
 
 function textNaturalWidthMm(obj) {
@@ -149,7 +135,7 @@ function objectContentEndMm(obj) {
   const { value } = objectFont(obj);
   ctx.save();
   ctx.font = value;
-  const lines = wrapCanvasText(obj.text || "", mmToPx(obj.w));
+  const lines = canvasTextLines(obj.text || "");
   const textWidthMm = Math.max(...lines.map((line) => pxToMm(ctx.measureText(line).width)), 0);
   ctx.restore();
 
@@ -255,7 +241,7 @@ function drawTextObject(obj) {
   ctx.font = font;
   ctx.textBaseline = "middle";
   ctx.textAlign = obj.align || "left";
-  const lines = wrapCanvasText(obj.text || "", w);
+  const lines = canvasTextLines(obj.text || "");
   const lineHeight = fontPx * 1.15;
   const total = lineHeight * lines.length;
   let cy = y + h / 2 - total / 2 + lineHeight / 2;