From 03969d3b83a07abe0b6707e21230bd6c3a184942 Mon Sep 17 00:00:00 2001
From: metamuffin <metamuffin@disroot.org>
Date: Fri, 17 Oct 2025 23:00:08 +0200
Subject: Fix problems caused by negative viewBox in diagram svg

---
 server/book-export/src/book_html.css  |  5 +++++
 server/book-export/src/diagram_svg.rs | 11 ++++++++++-
 2 files changed, 15 insertions(+), 1 deletion(-)

(limited to 'server/book-export/src')

diff --git a/server/book-export/src/book_html.css b/server/book-export/src/book_html.css
index 9171aa5e..252604b6 100644
--- a/server/book-export/src/book_html.css
+++ b/server/book-export/src/book_html.css
@@ -39,3 +39,8 @@ body {
     height: auto;
     overflow-y: auto;
 }
+
+svg {
+    width: 100%;
+    height: 100%;
+}
\ No newline at end of file
diff --git a/server/book-export/src/diagram_svg.rs b/server/book-export/src/diagram_svg.rs
index a9a2c0a6..290db072 100644
--- a/server/book-export/src/diagram_svg.rs
+++ b/server/book-export/src/diagram_svg.rs
@@ -30,13 +30,22 @@ const HSIZE: f32 = SIZE / 2.;
 pub fn diagram_svg(data: &Gamedata, diagram: &Diagram) -> Result<String> {
     let mut out = String::new();
 
-    let (vb_min, vb_max) = diagram
+    let (mut vb_min, mut vb_max) = diagram
         .nodes
         .iter()
         .map(|n| (n.position, n.position))
         .reduce(|(xa, xb), (ya, yb)| (xa.min(ya), xb.max(yb)))
         .unwrap();
 
+    // negative viewBox causes weird issues
+    let new_origin = vb_min - Vec2::splat(HSIZE);
+    let mut diagram = diagram.to_owned();
+    for n in &mut diagram.nodes {
+        n.position -= new_origin;
+    }
+    vb_min -= new_origin;
+    vb_max -= new_origin;
+
     writeln!(
         out,
         r#"<svg xmlns="http://www.w3.org/2000/svg" viewBox="{} {} {} {}" width="{}" height="{}">"#,
-- 
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