From 732c68448f3c801ded7ad0f8e1f91650c0d63d61 Mon Sep 17 00:00:00 2001
From: Joachim Lusiardi <joachim@lusiardi.de>
Date: Sat, 11 Nov 2023 16:01:44 +0100
Subject: [PATCH] forgotten file

---
 src/level_widget.rs | 151 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 151 insertions(+)
 create mode 100644 src/level_widget.rs

diff --git a/src/level_widget.rs b/src/level_widget.rs
new file mode 100644
index 0000000..a7aecda
--- /dev/null
+++ b/src/level_widget.rs
@@ -0,0 +1,151 @@
+use ratatui::prelude::*;
+use ratatui::widgets::Widget;
+use crate::level::{Level, LevelElement};
+
+const FG_BROWN: Color = Color::Rgb(186, 74, 0);
+
+pub struct LevelWidget {
+    pub content: Level,
+}
+
+impl LevelWidget {
+    fn set_cell(&self, buf: &mut Buffer, x: u16, y: u16, symbol: &str, fg: Color, bg: Color) {
+        buf.
+            get_mut(x, y).
+            set_symbol(symbol).
+            set_bg(bg).
+            set_fg(fg);
+    }
+
+    // ┃ ━ ┏ ┓ ┗ ┛ ┣ ┫ ┳ ┻ ╋
+    fn foo(top: Option<LevelElement>, right: Option<LevelElement>, bottom: Option<LevelElement>, left: Option<LevelElement>) -> String {
+        let mut val = 0;
+        val += match top {
+            Some(n) => {
+                match n {
+                    LevelElement::Wall => 1,
+                    _ => 0
+                }
+            }
+            None => 0
+        };
+        val += match right {
+            Some(n) => {
+                match n {
+                    LevelElement::Wall => 2,
+                    _ => 0
+                }
+            }
+            None => 0
+        };
+        val += match bottom {
+            Some(n) => {
+                match n {
+                    LevelElement::Wall => 4,
+                    _ => 0
+                }
+            }
+            None => 0
+        };
+        val += match left {
+            Some(n) => {
+                match n {
+                    LevelElement::Wall => 8,
+                    _ => 0
+                }
+            }
+            None => 0
+        };
+
+        // 0 ╋   5 ┃  9 ┛
+        // 1 ┃   6 ┏ 10 ━
+        // 2 ━   7 ┣ 11 ┻
+        // 3 ┗
+        // 4 ┃   8 ━ 12 ┓
+        [
+            "╋", "┃", "━", "┗",
+            "┃", "┃", "┏", "┣",
+            "━", "┛", "━", "┻",
+            "┓", "┫", "┳", "╋",
+        ][val].to_string()
+    }
+}
+
+impl Widget for LevelWidget {
+    fn render(self, area: Rect, buf: &mut Buffer) {
+        let al = area.left();
+        let at = area.top();
+        for x in al..area.right() {
+            for y in at..area.bottom() {
+                let level_x = (x-al) as i16;
+                let level_y = (y-at) as i16;
+                match self.content.get_element(level_x, level_y) {
+                    None => {}
+                    Some(e) => {
+                        match e {
+                            LevelElement::Wall => {
+                                let top = self.content.get_element(level_x, level_y-1);
+                                let right = self.content.get_element(level_x+1, level_y);
+                                let bottom = self.content.get_element(level_x, level_y+1);
+                                let left = self.content.get_element(level_x-1, level_y);
+                                let symbol = LevelWidget::foo(top, right, bottom, left);
+                                self.set_cell(buf, x, y, symbol.as_str(), FG_BROWN, Color::Gray);
+                            }
+                            LevelElement::Floor => {
+                                self.set_cell(buf, x, y, " ", FG_BROWN, Color::Gray);
+                            }
+                            LevelElement::StairDown => {
+                                self.set_cell(buf, x, y, ">", FG_BROWN, Color::Gray);
+                            }
+                            LevelElement::StairUp => {
+                                self.set_cell(buf, x, y, "<", FG_BROWN, Color::Gray);
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}
+
+#[test]
+fn test_get_wall_symbol() {
+    let wall = Some(LevelElement::Wall);
+    // 0
+    let s = LevelWidget::foo(None, None, None, None);
+    assert_eq!(s, "╋");
+    // 15
+    let s = LevelWidget::foo(wall, wall, wall, wall);
+    assert_eq!(s, "╋");
+
+    // 1
+    let s = LevelWidget::foo(wall, None, None, None);
+    assert_eq!(s, "┃");
+    // 5
+    let s = LevelWidget::foo(wall, None, wall, None);
+    assert_eq!(s, "┃");
+    // 4
+    let s = LevelWidget::foo(None, None, wall, None);
+    assert_eq!(s, "┃");
+
+    // 2
+    let s = LevelWidget::foo(None, wall, None, None);
+    assert_eq!(s, "━");
+    // 10
+    let s = LevelWidget::foo(None, wall, None, wall);
+    assert_eq!(s, "━");
+
+    // 9
+    let s = LevelWidget::foo(wall, None, None, wall);
+    assert_eq!(s, "┛");
+    // 3
+    let s = LevelWidget::foo(wall, wall, None, None);
+    assert_eq!(s, "┗");
+    // 6
+    let s = LevelWidget::foo( None, wall,wall,None);
+    assert_eq!(s, "┏");
+    // 12
+    let s = LevelWidget::foo(None, None, wall, wall);
+    assert_eq!(s, "┓");
+}
+