Add beginnings of Python client.

diff --git a/client_prototype.py b/client_prototype.py
new file mode 100644 (file)
index 0000000..0a2bb0a
--- /dev/null
+++ b/client_prototype.py
@@ -0,0 +1,164 @@
+import curses
+
+
+def set_window_geometries():
+
+    def set_window_size():
+        win["size"], win["start"] = [0, 0], [0, 0]
+        win["size"][0] = win["config"][0]
+        if (win["config"][0] == 0):
+            win["size"][0] = screen_size[0] - sep_size
+        elif (win["config"][0] < 0):
+            win["size"][0] = screen_size[0] + win["config"][0] - sep_size
+        win["size"][1] = win["config"][1]
+        if (win["config"][1] == 0):
+            win["size"][1] = screen_size[1]
+        elif (win["config"][1] < 0):
+            win["size"][1] = screen_size[1] + win["config"][1]
+
+    def place_window():
+        win_i = windows.index(win)
+
+        # If win is first window, it goes into the top left corner.
+        win["start"][0] = 0 + sep_size
+        win["start"][1] = 0
+        if (win_i > 0):
+
+            # If not, get win's closest predecessor starting a new stack on the
+            # screen top, fit win's top left corner that predecessor's top
+            # right corner.
+            win_top = None
+            for i in range(win_i - 1, -1, -1):
+                win_top = windows[i]
+                if (win_top["start"][0] == 0 + sep_size):
+                    break
+            win["start"][1] = win_top["start"][1] + win_top["size"][1] \
+                + sep_size
+
+            # If enough space is found below win's predecessor, fit win's top
+            # left corner to that predecessor's bottom left corner.
+            win_prev = windows[win_i - 1]
+            next_free_y = win_prev["start"][0] + win_prev["size"][0] + sep_size
+            if (win["size"][1] <= win_prev["size"][1] and
+                    win["size"][0] <= screen_size[0] - next_free_y):
+                win["start"][1] = win_prev["start"][1]
+                win["start"][0] = next_free_y
+
+            # If that fails, try to fit win's top left corner to the top right
+            # corner of its closest predecessor win_test that 1) is below
+            # win_top (win's closest predecessor starting a new stack on the
+            # screen top) 2) and has enough space open to its right between its
+            # right edge and the lower edge of a window win_high located
+            # directly above win_test to fit win there (without growing further
+            # to the right than win_high does or surpassing the lower edge of
+            # the screen).
+            else:
+                win_test = win_prev
+                win_high = None
+                while (win_test != win_top):
+                    for i in range(win_i - 2, -1, -1):
+                        win_high = windows[i]
+                        if win_test["start"][0] > win_high["start"][0]:
+                            break
+                    next_free_y = win_high["start"][0] + win_high["size"][0] \
+                        + sep_size
+                    first_free_x = win_test["start"][1] + win_test["size"][1] \
+                        + sep_size
+                    last_free_x = win_high["start"][1] + win_high["size"][1]
+                    if (win["size"][0] <= screen_size[0] - next_free_y and
+                            win["size"][1] <= last_free_x - first_free_x):
+                        win["start"][1] = first_free_x
+                        win["start"][0] = next_free_y
+                        break
+                    win_test = win_high
+
+    for win in windows:
+        set_window_size()
+        place_window()
+
+
+def draw_screen():
+
+    def draw_window_border_lines():
+        for win in windows:
+            for k in range(2):
+                j = win["start"][int(k == 0)] - sep_size
+                if (j >= 0 and j < screen_size[int(k == 0)]):
+                    start = win["start"][k]
+                    end = win["start"][k] + win["size"][k]
+                    start = start if start >= 0 else 0
+                    end = end if end < screen_size[k] else screen_size[k]
+                    if k:
+                        [stdscr.addch(j, i, '-') for i in range(start, end)]
+                    else:
+                        [stdscr.addch(i, j, '|') for i in range(start, end)]
+
+    def draw_window_border_corners():
+        for win in windows:
+            up = win["start"][0] - sep_size
+            down = win["start"][0] + win["size"][0]
+            left = win["start"][1] - sep_size
+            right = win["start"][1] + win["size"][1]
+            if (up >= 0 and up < screen_size[0]):
+                if (left >= 0 and left < screen_size[1]):
+                    stdscr.addch(up, left, '+')
+                if (right >= 0 and right < screen_size[1]):
+                    stdscr.addch(up, right, '+')
+            if (down >= 0 and down < screen_size[0]):
+                if (left >= 0 and left < screen_size[1]):
+                    stdscr.addch(down, left, '+')
+                if (right >= 0 and right < screen_size[1]):
+                    stdscr.addch(down, right, '+')
+
+    def draw_window_contents():
+        for win in windows:
+            offset, size, winmap = win["func"]()
+            stop = [0, 0]
+            for i in range(2):
+                stop[i] = win["size"][i] + offset[i]
+                stop[i] = stop[i] if stop[i] < size[i] else size[i]
+            for y in range(offset[0], stop[0]):
+                for x in range(offset[1], stop[1]):
+                    cell = winmap[y * size[1] + x]
+                    y_in_screen = win["start"][0] + (y - offset[0])
+                    x_in_screen = win["start"][1] + (x - offset[1])
+                    if (y_in_screen < screen_size[0]
+                            and x_in_screen < screen_size[1]):
+                        stdscr.addch(y_in_screen, x_in_screen, cell)
+
+    draw_window_border_lines()
+    draw_window_border_corners()
+    draw_window_contents()
+    stdscr.refresh()
+
+
+def main(stdscr):
+    curses.noecho()
+    curses.curs_set(False)
+    # stdscr.keypad(True)
+    set_window_geometries()
+    while True:
+        draw_screen()
+        stdscr.getch()
+
+
+def foo():
+    winmap = ['.', 'o', '.', 'o', 'O', 'o', '.', 'o', '.', 'x', 'y', 'x']
+    size = [4, 3]
+    offset = [0, 0]
+    return offset, size, winmap
+
+
+windows = [
+    {"config": [1, 33], "func": foo},
+    {"config": [-7, 33], "func": foo},
+    {"config": [4, 16], "func": foo},
+    {"config": [4, 16], "func": foo},
+    {"config": [0, -34], "func": foo}
+]
+
+sep_size = 1  # Width of inter-window borders and title bars.
+stdscr = curses.initscr()
+screen_size = stdscr.getmaxyx()
+
+curses.wrapper(main)