Begin to read in files at startup

.gitignore

@@ -1 +1,2 @@
 /target
+.idea

core/buffer.py

@@ -0,0 +1,9 @@
+import curses
+
+
+def write_buffer(stdscr, data):
+    count = 0
+    for line in data["buffer_list"]:
+        str_line = "".join(line)
+        stdscr.addstr(count, len(data["info_bar"][0]), str_line + (" " * (len(line) - 1)), curses.color_pair(1))
+        count += 1

core/files.py

@@ -0,0 +1,4 @@
+def open_file(file):
+    with open(file) as f:
+        lines = f.readlines()
+        return lines

core/statusbar.py

@@ -9,7 +9,7 @@ def themes(data):
         # Add spaces before each part
         icon = f" {data['icon']}"
         mode = f" {data['mode'].upper()}"
-        file = f" {data['file']}"
+        file = f" {data['buffer_name']}"
 
     else:
         # The theme colors
@@ -18,7 +18,7 @@ def themes(data):
         # Add spaces on either end
         icon = f" {data['icon']} "
         mode = f" {data['mode'].upper()} "
-        file = f" {data['file']} "
+        file = f" {data['buffer_name']} "
 
     return colors, icon, mode, file
 

core/utils.py

@@ -1,17 +1,17 @@
 from sys import exit
-from core import cursor
 import curses
 
 
 def goodbye(stdscr, data):
     # The prompt message
-    prompt = "Really quit lambda? (y or n): "
+    saved = "All changes are saved."
+    prompt = "Really quit? (y or n): "
 
     # Clear the bottom line
-    stdscr.addstr(data["height"]-1, 0, " " * (data["width"] - 1), curses.color_pair(1))
-    
+    stdscr.addstr(data["height"] - 1, 0, " " * (data["width"] - 1), curses.color_pair(1))
+
     # Print the prompt
-    stdscr.addstr(data["height"]-1, 0, prompt, curses.color_pair(11))
+    stdscr.addstr(data["height"] - 1, 0, prompt, curses.color_pair(11))
 
     # Wait for and capture a key press from the user
     key = stdscr.getch()
@@ -21,17 +21,17 @@ def goodbye(stdscr, data):
         exit()
 
     # Clear the bottom line again
-    stdscr.addstr(data["height"]-1, 0, " " * (data["width"] - 1), curses.color_pair(1))
+    stdscr.addstr(data["height"] - 1, 0, " " * (data["width"] - 1), curses.color_pair(1))
 
 
 def error(stdscr, data, error_msg):
     # Print the error message to the bottom line
     error_msg = f"ERROR: {error_msg}"
-    stdscr.addstr(data["height"]-1, 0, error_msg, curses.color_pair(3))
-    stdscr.addstr(data["height"]-1, len(error_msg) + 1, "(press any key) ", curses.color_pair(1))
+    stdscr.addstr(data["height"] - 1, 0, error_msg, curses.color_pair(3))
+    stdscr.addstr(data["height"] - 1, len(error_msg) + 1, "(press any key) ", curses.color_pair(1))
 
     # Wait for a key to be pressed
     stdscr.getch()
 
     # Clear the bottom line
-    stdscr.addstr(data["height"]-1, 0, " " * (data["width"] - 1), curses.color_pair(1))
+    stdscr.addstr(data["height"] - 1, 0, " " * (data["width"] - 1), curses.color_pair(1))

lambda

@@ -1,93 +1,3 @@
-#!/usr/bin/python
-from core import colors, cursor, mode
-import os
-import curses
-import argparse
+#!/bin/sh
 
-
-def start_screen(stdscr):
-    # Get window height and width
-    height, width = stdscr.getmaxyx()
-
-    # Startup text
-    title = "λ Lambda"
-    subtext = [
-        "Next generation hackable text editor for nerds",
-        "",
-        "Type :h to open the README.md document",
-        "Type :o <file> to open a file and edit",
-        "Type :q or <C-c> to quit lambda"
-    ]
-
-    # Centering calculations
-    start_x_title = int((width // 2) - (len(title) // 2) - len(title) % 2)
-    start_y = int((height // 2) - 2)
-
-    # Rendering title
-    stdscr.addstr(start_y, start_x_title, title, curses.color_pair(7) | curses.A_BOLD)
-
-    # Print the subtext
-    for text in subtext:
-        start_y += 1
-        start_x = int((width // 2) - (len(text) // 2) - len(text) % 2)
-        stdscr.addstr(start_y, start_x, text)
-
-
-def start(stdscr, file):
-    # Initialise data before starting
-    data = {
-            "cursor_y": 0,
-            "cursor_x": 0,
-            "height": 0,
-            "width": 0,
-            "mode": "normal",
-            "icon": "λ",
-            "file": file,
-            "statusbar_theme": "filled"
-    }
-
-    # Initialise colors
-    colors.init_colors()
-
-    # Change the cursor shape
-    cursor.cursor_mode("block")
-
-    # Start the screen
-    start_screen(stdscr)
-
-    # Main loop
-    while True:
-        # Get the height and width of the screen
-        data["height"], data["width"] = stdscr.getmaxyx()
-
-        # Activate the next mode
-        data = mode.activate(stdscr, data)
-
-        # Refresh and clear the screen
-        stdscr.refresh()
-        stdscr.clear()
-
-
-def main():
-    parser = argparse.ArgumentParser(description="Process some integers.")
-    parser.add_argument("file", metavar="file", type=str, nargs="?",
-                        help="File to open")
-
-    args = parser.parse_args()
-    # Check the file name
-    if args.file:
-        file = args.file
-
-    else:
-        file = "[No Name]"
-
-    # Change the escape delay to 25ms
-    # Fixes an issue where esc takes too long to press
-    os.environ.setdefault("ESCDELAY", "25")
-
-    # Initialise the screen
-    curses.wrapper(start, file)
-
-
-if __name__ == "__main__":
-    main()
+python3 ./lambda.py $@

lambda.py

@@ -0,0 +1,104 @@
+from core import colors, cursor, mode, files, buffer
+import os
+import curses
+import argparse
+
+
+def start_screen(stdscr):
+    # Get window height and width
+    height, width = stdscr.getmaxyx()
+
+    # Startup text
+    title = "λ Lambda"
+    subtext = [
+        "Next generation hackable text editor for nerds",
+        "",
+        "Type :h to open the README.md document",
+        "Type :o <file> to open a file and edit",
+        "Type :q or <C-c> to quit lambda.py"
+    ]
+
+    # Centering calculations
+    start_x_title = int((width // 2) - (len(title) // 2) - len(title) % 2)
+    start_y = int((height // 2) - 2)
+
+    # Rendering title
+    stdscr.addstr(start_y, start_x_title, title, curses.color_pair(7) | curses.A_BOLD)
+
+    # Print the subtext
+    for text in subtext:
+        start_y += 1
+        start_x = int((width // 2) - (len(text) // 2) - len(text) % 2)
+        stdscr.addstr(start_y, start_x, text)
+
+
+def start(stdscr, buffer_name, buffer_list):
+    # Initialise data before starting
+    data = {
+        "cursor_y": 0,
+        "cursor_x": 0,
+        "height": 0,
+        "width": 0,
+        "mode": "normal",
+        "icon": "λ",
+        "info_bar": ["  "],
+        "buffer_name": buffer_name,
+        "buffer_list": buffer_list,
+        "statusbar_theme": "filled"
+    }
+
+    # Initialise colors
+    colors.init_colors()
+
+    # Change the cursor shape
+    cursor.cursor_mode("block")
+
+    # Start the screen
+    if data["buffer_name"] == "[No Name]":
+        start_screen(stdscr)
+
+    # Main loop
+    while True:
+        # Get the height and width of the screen
+        data["height"], data["width"] = stdscr.getmaxyx()
+
+        # Write the buffer to the screen
+        buffer.write_buffer(stdscr, data)
+
+        # Activate the next mode
+        data = mode.activate(stdscr, data)
+
+        # Refresh and clear the screen
+        stdscr.refresh()
+        stdscr.clear()
+
+
+def main():
+    parser = argparse.ArgumentParser(description="Process some integers.")
+    parser.add_argument("file", metavar="file", type=str, nargs="?",
+                        help="File to open")
+
+    args = parser.parse_args()
+    # Check if a file name has been inputted
+    if args.file:
+        buffer_name = args.file
+        buffer_list = files.open_file(buffer_name)
+
+        # Convert each line into a list of lists with each element of the sublist representing one character
+        for index, line in enumerate(buffer_list):
+            buffer_list[index] = list(line)
+
+    else:
+        buffer_name = "[No Name]"
+        buffer_list = [[""]]
+
+    # Change the escape delay to 25ms
+    # Fixes an issue where esc takes too long to press
+    os.environ.setdefault("ESCDELAY", "25")
+
+    # Initialise the screen
+    curses.wrapper(start, buffer_name, buffer_list)
+
+
+if __name__ == "__main__":
+    main()

modes/normal.py

@@ -22,6 +22,11 @@ def execute(data, key):
         # Exit normal mode and enter insert mode
         data["mode"] = "insert"
 
+    elif key == ord("I"):
+        # Exit normal mode and enter insert mode
+        data["cursor_x"] += 1
+        data["mode"] = "insert"
+
     elif key in (ord(":"), ord(";")):
         # Exit normal mode and enter command mode
         data["mode"] = "command"