From 7a04c8104d94ad6357a10218beed57bd783e3017 Mon Sep 17 00:00:00 2001
From: "Kartik K. Agaram" <vc@akkartik.com>
Date: Sat, 22 May 2021 10:28:21 -0700
Subject: [PATCH] shell: reduce trace depth in sandbox

We'll gradually make this more dynamic.
---
 501draw-text.mu  |  7 +++++++
 shell/sandbox.mu |  2 +-
 shell/trace.mu   | 16 ++++++++++++++++
 3 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/501draw-text.mu b/501draw-text.mu
index 1a953969..1a729c1f 100644
--- a/501draw-text.mu
+++ b/501draw-text.mu
@@ -138,6 +138,13 @@ fn draw-text-rightward-from-cursor screen: (addr screen), text: (addr array byte
   set-cursor-position screen, cursor-x, cursor-y
 }
 
+fn draw-text-rightward-from-cursor-over-full-screen screen: (addr screen), text: (addr array byte), color: int, background-color: int {
+  var width/eax: int <- copy 0
+  var height/ecx: int <- copy 0
+  width, height <- screen-size screen
+  draw-text-rightward-from-cursor screen, text, width, color, background-color
+}
+
 fn render-grapheme screen: (addr screen), g: grapheme, xmin: int, ymin: int, xmax: int, ymax: int, x: int, y: int, color: int, background-color: int -> _/eax: int, _/ecx: int {
   compare g, 0xa/newline
   var x/eax: int <- copy x
diff --git a/shell/sandbox.mu b/shell/sandbox.mu
index d5cf6c8f..65dd6c4e 100644
--- a/shell/sandbox.mu
+++ b/shell/sandbox.mu
@@ -31,7 +31,7 @@ fn initialize-sandbox _self: (addr sandbox), fake-screen-and-keyboard?: boolean
   var trace-ah/eax: (addr handle trace) <- get self, trace
   allocate trace-ah
   var trace/eax: (addr trace) <- lookup *trace-ah
-  initialize-trace trace, 0x100/max-depth, 0x8000/lines, 0x80/visible
+  initialize-trace trace, 4/max-depth, 0x8000/lines, 0x80/visible
   var cursor-in-data?/eax: (addr boolean) <- get self, cursor-in-data?
   copy-to *cursor-in-data?, 1/true
 }
diff --git a/shell/trace.mu b/shell/trace.mu
index 0398a099..43b19246 100644
--- a/shell/trace.mu
+++ b/shell/trace.mu
@@ -433,6 +433,22 @@ fn render-trace screen: (addr screen), _self: (addr trace), xmin: int, ymin: int
   var i/edx: int <- copy 0
   var max-addr/ebx: (addr int) <- get self, first-free
   var max/ebx: int <- copy *max-addr
+  # display trace depth (not in tests)
+  $render-trace:render-depth: {
+    compare max, 0
+    break-if-<=
+    var max-depth/edx: (addr int) <- get self, max-depth
+    {
+      var width/eax: int <- copy 0
+      var height/ecx: int <- copy 0
+      width, height <- screen-size screen
+      compare width, 0x80
+      break-if-< $render-trace:render-depth
+    }
+    set-cursor-position screen, 0x70/x, y
+    draw-text-rightward-from-cursor-over-full-screen screen, "trace depth: ", 0x17/fg, 0xc5/bg=blue-bg
+    draw-int32-decimal-wrapping-right-then-down-from-cursor-over-full-screen screen, *max-depth, 0x7/fg, 0xc5/bg=blue-bg
+  }
   $render-trace:loop: {
     compare i, max
     break-if->=