From b6cfca110cc90a5da88e7409aa60cdfa1fefad72 Mon Sep 17 00:00:00 2001
From: James Campos <james.r.campos@gmail.com>
Date: Wed, 25 Nov 2020 14:19:05 -0800
Subject: on_resize

---
 src/main.rs | 3 ++-
 src/view.rs | 8 ++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/main.rs b/src/main.rs
index 1792dfb..ac3d8cc 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -185,6 +185,7 @@ impl Bk<'_> {
 
             match event::read()? {
                 Event::Key(e) => view.on_key(self, e.code),
+                Event::Mouse(e) => view.on_mouse(self, e),
                 Event::Resize(cols, rows) => {
                     self.rows = rows as usize;
                     if cols != self.cols {
@@ -194,8 +195,8 @@ impl Bk<'_> {
                             c.lines = wrap(&c.text, width);
                         }
                     }
+                    view.on_resize(self);
                 }
-                Event::Mouse(e) => view.on_mouse(self, e),
             }
         }
 
diff --git a/src/view.rs b/src/view.rs
index cdb2ceb..d92ad58 100644
--- a/src/view.rs
+++ b/src/view.rs
@@ -14,6 +14,7 @@ pub trait View {
     fn render(&self, bk: &Bk) -> Vec<String>;
     fn on_key(&self, bk: &mut Bk, kc: KeyCode);
     fn on_mouse(&self, _: &mut Bk, _: MouseEvent) {}
+    fn on_resize(&self, _: &mut Bk) {}
 }
 
 // TODO render something useful?
@@ -127,6 +128,9 @@ impl Nav {
     }
 }
 impl View for Nav {
+    fn on_resize(&self, bk: &mut Bk) {
+        self.cursor(bk);
+    }
     fn on_mouse(&self, bk: &mut Bk, e: MouseEvent) {
         match e {
             MouseEvent::Down(_, _, row, _) => self.click(bk, row as usize),
@@ -273,6 +277,10 @@ impl View for Page {
             _ => (),
         }
     }
+    fn on_resize(&self, bk: &mut Bk) {
+        // lazy
+        bk.line = min(bk.line, bk.chap().lines.len() - 1);
+    }
     fn render(&self, bk: &Bk) -> Vec<String> {
         let c = bk.chap();
         let line_end = min(bk.line + bk.rows, c.lines.len());
-- 
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