From 755d1dda2a1eb1c26fa7bc12328e2bca25256257 Mon Sep 17 00:00:00 2001
From: Ben Connors <benconnors@outlook.com>
Date: Fri, 18 Oct 2019 23:02:12 -0400
Subject: Get a decent start on the actual interface

- Can edit, create, delete scenes
- Basic saving
---
 interface/pager.py | 149 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 149 insertions(+)
 create mode 100755 interface/pager.py

(limited to 'interface/pager.py')

diff --git a/interface/pager.py b/interface/pager.py
new file mode 100755
index 0000000..2203e52
--- /dev/null
+++ b/interface/pager.py
@@ -0,0 +1,149 @@
+#!/usr/bin/env python3
+
+import curses 
+import threading
+
+from .globals import CURSES_LOCK
+
+class Pager:
+    def set_dim(self, height, width):
+        if height < 4 or width < 10:
+            raise ValueError("Size too small")
+
+        with self._lock:
+            if (height, width) != (self._height, self._width):
+                self.win.erase()
+                self.win.noutrefresh()
+
+                self.win.resize(height, width)
+                self.win.redrawwin()
+
+            self._height = height
+            self._width = width
+            self._regen_actual()
+            self._redraw()
+        
+    def set_pos(self, y, x):
+        with self._lock:
+            if (y, x) != (self._y, self._x):
+                self.win.mvwin(y, x)
+                self._y = y
+                self._x = x
+                self.win.noutrefresh()
+
+    def _redraw(self):
+        with self._lock, CURSES_LOCK:
+            start = max(0, self._bottom_a - self._height + 2)
+            end = self._bottom_a
+            todisp = self._actual[start:end]
+            if len(todisp) < self._height-2 and len(todisp) < len(self._actual):
+                end = self._bottom_a+self._height-2-len(todisp)
+                todisp += self._actual[self._bottom_a:end]
+            self.win.erase()
+            self.win.border()
+            if start > 0:
+                self.win.addch(0, self._width//2, '⯅')
+            for n, l in enumerate(todisp, 1):
+                self.win.addstr(n, 1, l)
+            if end < len(self._actual):
+                self.win.addch(self._height-1, self._width//2, '⯆')
+            self.win.refresh()
+
+    def _split_line(self, l):
+        with self._lock:
+            lines = []
+            
+            while len(l) >= self._width-2:
+                lines.append(l[:self._width-3] + '…')
+                l = "⮡ "+l[self._width-3:]
+            lines.append(l)
+
+            return lines
+                
+    def _regen_actual(self):
+        with self._lock:
+            self._actual = []
+            for n, l in enumerate(self._lines):
+                self._actual += self._split_line(l)
+                if n == self._bottom:
+                    self._bottom_a = len(self._actual)
+            self._bottom_a = max(self._bottom_a, self._height-2)
+
+    def display_many(self, s, split=False):
+        with self._lock:
+            if split:
+                self._lines.append("")
+                self._actual.append("")
+            for l in s:
+                self._lines.append(l)
+                self._actual += self._split_line(l)
+            self._bottom = len(self._lines) - 1
+            self._bottom_a = len(self._actual)
+            self._redraw()
+
+    def display(self, s):
+        self.display_many((s, ))
+
+    def user_page(self, refresh=None):
+        curses.curs_set(0)
+        
+        while True:
+            l = self.win.getch()
+
+            with self._lock:
+                if l == curses.KEY_RESIZE:
+                    if refresh is not None:
+                        refresh()
+                elif l == ord('q'):
+                    break
+                elif l in (ord('k'), curses.KEY_UP):
+                    if self._bottom_a > self._height-2:
+                        self._bottom_a -= 1
+                        self._redraw()
+                elif l in (ord('j'), curses.KEY_DOWN):
+                    if self._bottom_a < len(self._actual):
+                        self._bottom_a += 1
+                        self._redraw()
+                elif l == curses.KEY_NPAGE:
+                    if self._bottom_a < len(self._actual):
+                        self._bottom_a = min(len(self._actual), self._bottom_a + self._height - 2)
+                        self._redraw()
+                elif l == curses.KEY_PPAGE:
+                    if self._bottom_a > 0:
+                        self._bottom_a = max(self._height - 2, self._bottom_a - self._height + 2)
+                        self._redraw()
+                elif l == curses.KEY_HOME:
+                    if self._bottom_a > self._height - 2:
+                        self._bottom_a = self._height - 2
+                        self._redraw()
+                elif l == curses.KEY_END:
+                    if self._bottom_a < len(self._actual):
+                        self._bottom_a = len(self._actual)
+                        self._redraw()
+
+        curses.curs_set(1)
+
+    def clear(self):
+        with self._lock:
+            self._lines = []
+            self._actual = []
+            self._bottom_a = 0
+            self._bottom = -1
+            self._redraw()
+
+    def __init__(self, y, x, height, width):
+        with CURSES_LOCK:
+            self.win = curses.newwin(height, width, y, x)
+            self.win.keypad(True)
+        self._lock = threading.RLock()
+        self._height = height
+        self._width = width
+        self._y = -1
+        self._x = -1
+        self._lines = []
+        self._actual = []
+        self._bottom = -1
+        self._bottom_a = 0
+
+        self.set_pos(y, x)
+        self.set_dim(height, width)
-- 
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