From 0f140ebc681b7411dd76e110b2fe304f3e583c6c Mon Sep 17 00:00:00 2001
From: littleblack111 <littleblack11111@gmail.com>
Date: Mon, 29 Sep 2025 12:03:12 +0800
Subject: image(text): line wrap

---
 src/image.rs | 51 ++++++++++++++++++++++++++++++++++-----------------
 1 file changed, 34 insertions(+), 17 deletions(-)

(limited to 'src/image.rs')

diff --git a/src/image.rs b/src/image.rs
index 2aea600..76e86ce 100644
--- a/src/image.rs
+++ b/src/image.rs
@@ -15,6 +15,7 @@ type Offset = (u32, u32); // x, y or width, height
 const COMPONENT_TEXT_PADDING: u32 = 1 * RESOLUTION_MULTIPLIER;
 
 const TEXT_SCALE: f32 = 12.0 * RESOLUTION_MULTIPLIER as f32;
+const TEXT_LEN_WRAP: usize = 10;
 
 // TODO: LENGTH based on where to where
 const DIRECTION_LINE_THICKNESS: u32 = 2 * RESOLUTION_MULTIPLIER;
@@ -56,6 +57,17 @@ mod colors {
     ]);
 }
 
+fn wrap_str(s: &str) -> Vec<String> {
+    s.chars()
+        .collect::<Vec<_>>()
+        .chunks(TEXT_LEN_WRAP)
+        .map(|c| {
+            c.iter()
+                .collect()
+        })
+        .collect()
+}
+
 // TODO: store as singleton
 fn get_font() -> Result<FontArc, io::Error> {
     let mut db = Database::new();
@@ -106,27 +118,32 @@ fn ext(img: &mut DynamicImage, (curw, curh): &mut Offset, (extw, exth): &mut Off
 // TODO: make draw_rect func
 fn draw_process(img: &mut DynamicImage, txt: &str, (curw, curh): &mut Offset) -> Offset {
     *curw = curw
-        .checked_sub(TEXT_SCALE as u32 / 2)
+        .checked_sub(TEXT_SCALE as u32 * COMPONENT_TEXT_PADDING / 2)
         .unwrap_or(0);
-    let w = TEXT_SCALE as u32 + COMPONENT_TEXT_PADDING * 2;
-    let h = w;
+    let txt = wrap_str(txt);
+    let w = (TEXT_SCALE as u32 / 5 * TEXT_LEN_WRAP as u32) + (2 * COMPONENT_TEXT_PADDING);
+    let h = TEXT_SCALE as u32 / 2 * txt.len() as u32 + (2 * COMPONENT_TEXT_PADDING);
     ext(img, &mut (*curw, *curh), &mut (w, h));
     draw_filled_rect_mut(img, Rect::at(*curw as i32, *curh as i32).of_size(w, h), colors::PROCESS);
-    draw_text_mut(
-        img,
-        colors::FG,
-        (*curw + COMPONENT_TEXT_PADDING)
-            .try_into()
-            .unwrap(),
-        (*curh + COMPONENT_TEXT_PADDING)
-            .try_into()
-            .unwrap(),
-        PxScale::from(TEXT_SCALE / 2.0),
-        &get_font().unwrap(),
-        txt,
-    );
+    // TODO: move to draw_text()
+    for s in txt {
+        draw_text_mut(
+            img,
+            colors::FG,
+            (*curw + COMPONENT_TEXT_PADDING)
+                .try_into()
+                .unwrap(),
+            (*curh + COMPONENT_TEXT_PADDING)
+                .try_into()
+                .unwrap(),
+            PxScale::from(TEXT_SCALE / 2_f32),
+            &get_font().unwrap(),
+            s.as_str(),
+        );
+        *curh += TEXT_SCALE as u32 / 2;
+    }
     *curw += w / 2;
-    *curh += h;
+    *curh += 2 * COMPONENT_TEXT_PADDING;
     (*curw, *curh)
 }
 
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