kiloz

commit a1ecbb9cf0a6d7c32170cfef53d0f93bf4f78dc1
parent 62d20d78b83589833ee41922cde6121b646557a8
Author: Martin Ashby <martin@ashbysoft.com>
Date:   Sun, 28 Jan 2024 20:01:23 +0000

Step 107, it is now an editor!

Diffstat:
M
src/main.zig
 | 
42
+++++++++++++++++++++++++++++++++++++++---
M
tabs.txt
 | 
2
+-

2 files changed, 40 insertions(+), 4 deletions(-)
diff --git a/src/main.zig b/src/main.zig
@@ -1,9 +1,14 @@
 const std = @import("std");
 
 const version = @import("options").version;
-const quit: editorKey = .{ .char = 17 }; // ctrl+q
+const quit: editorKey = .{ .char = CTRL_KEY('q') };
 const tabstop = 8;
 
+//#define CTRL_KEY(k) ((k) & 0x1f)
+fn CTRL_KEY(k: u8) u8 {
+    return k & 0x1f;
+}
+
 var E: ?*EditorState = null; // ONLY use this for the log function...
 pub const std_options = struct {
     pub fn logFn(
@@ -168,6 +173,7 @@ const editorKey = union(enum) {
         HOME,
         END,
         DEL,
+        BACKSPACE,
     },
 };
 
@@ -178,7 +184,9 @@ fn editorReadKey() !editorKey {
             error.EndOfStream => continue,
             else => return e,
         };
-        if (ch == '\x1b') {
+        if (ch == 127) {
+            return .{.virt = .BACKSPACE};
+        } else if (ch == '\x1b') {
             const ch1 = rdr.readByte() catch |e| switch (e) {
                 error.EndOfStream => return .{ .char = '\x1b' },
                 else => return e,
@@ -336,6 +344,27 @@ fn editorOpen(es: *EditorState, filename: []const u8) !void {
     es.filename = filename;
 }
 
+fn editorSave(es: *EditorState) !void {
+    if (es.filename) |fname| {
+        const str = try editorRowsToString(es);
+        defer es.a.free(str);
+        const f = try std.fs.cwd().openFile(fname, .{.mode = .write_only});
+        defer f.close();
+        try f.setEndPos(str.len);
+        try f.writeAll(str);
+    }
+}
+
+fn editorRowsToString(es: *EditorState) ![]const u8 {
+    var str = CharAL{};
+    defer str.deinit(es.a);
+    for (es.erow.items) |erow| {
+        try str.appendSlice(es.a, erow.chars.items);
+        try str.append(es.a, '\n');
+    }
+    return try str.toOwnedSlice(es.a);
+}
+
 //// Output
 
 fn clearScreen() void {
@@ -471,13 +500,20 @@ fn editorProcessKeyPress(es: *EditorState) !void {
         .char => |ch| {
             switch (ch) {
                 quit.char => return error.Quit,
+                CTRL_KEY('s') => try editorSave(es),
+                '\r' => { 
+                    // TODO
+                },
                 else => try editorInsertChar(es, ch),
             }
         },
         .virt => |v| {
             switch (v) {
                 .ARROW_UP, .ARROW_DOWN, .ARROW_LEFT, .ARROW_RIGHT, .PAGE_UP, .PAGE_DOWN, .HOME, .END => editorMoveCursor(key, es),
-                else => {},
+                .DEL, .BACKSPACE => {
+                    // TODO 
+                },
+                //else => {},
             }
         },
     }
diff --git a/tabs.txt b/tabs.txt
@@ -1,3 +1,3 @@
-	hi there I have a tab
+ho there	hi there I have a tab
 I don't
 I 	have a tab after some space