From de20d7430df08731d9108acb83e1234ba7f1fe16 Mon Sep 17 00:00:00 2001
From: Benji Dial <benji6283@gmail.com>
Date: Sat, 19 Sep 2020 14:53:29 -0400
Subject: file manager

---
 src/user/fileman/fileman.c | 130 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 130 insertions(+)
 create mode 100644 src/user/fileman/fileman.c

(limited to 'src/user/fileman')

diff --git a/src/user/fileman/fileman.c b/src/user/fileman/fileman.c
new file mode 100644
index 0000000..0b28d1d
--- /dev/null
+++ b/src/user/fileman/fileman.c
@@ -0,0 +1,130 @@
+#include <pland/syscall.h>
+#include <knob/block.h>
+#include <knob/file.h>
+#include <knob/heap.h>
+#include <knob/task.h>
+
+char path_sz[1024] = "";
+uint32_t path_len = 0;
+
+_dir_info_entry_t *dir_info;
+uint32_t dir_info_len;
+
+uint32_t scroll;
+uint32_t selected;
+#define MAX_PER_SCREEN 18
+
+void paint_screen() {
+  _clear_screen();
+
+  _set_color(0x70);
+  _print_at(0, 0, path_sz);
+  _log_string("/");
+  _set_color(0x07);
+
+  for (uint32_t i = scroll, row = 2; (i < dir_info_len) && (row < MAX_PER_SCREEN + 2); ++i, ++row) {
+    if (i == selected)
+      _set_color(0x17);
+    _print_at(row, 0, dir_info[i].name);
+    if (dir_info[i].is_dir)
+      _log_string("/");
+    if (i == selected)
+      _set_color(0x07);
+  }
+
+  _print_at(21, 0, "keybindings:\n"
+                   "UP, DOWN, PAGE UP, PAGE DOWN, HOME, END: move selection\n"
+                   "ENTER: enter selected directory, run selected program\n"
+                   "ESC:   go up a directory   Q: quit");
+}
+
+void load_dir() {
+  free_block(dir_info);
+  dir_info = get_directory_info(path_sz, &dir_info_len);
+  scroll = 0;
+  selected = 0;
+}
+
+void main(const char *sz) {
+  path_len = strcpy(path_sz, sz);
+  dir_info = get_directory_info(sz, &dir_info_len);
+
+  paint_screen();
+
+  while (true) {
+    _key_code_t key;
+    switch (key = _get_key()) {
+    case 0:
+      _yield_task();
+      continue;
+    case '\n':
+      {
+      uint32_t old_len = path_len;
+      if (path_len)
+        path_sz[path_len++] = '/';
+      path_len += strcpy(path_sz + path_len, dir_info[selected].name);
+      if (dir_info[selected].is_dir)
+        load_dir();
+      else {
+        try_run_command_blocking(path_sz);
+        //TODO: handle error
+        path_sz[old_len] = '\0';
+        path_len = old_len;
+      }
+      }
+      break;
+    case _KEY_ESC:
+      {
+      char *cutoff = path_sz;
+      for (char *i = path_sz + path_len - 1; i >= path_sz; --i)
+        if (*i == '/') {
+          cutoff = i;
+          break;
+        }
+      *cutoff = '\0';
+      path_len = cutoff - path_sz;
+      load_dir();
+      }
+      break;
+    case _KEY_HOME:
+      scroll = 0;
+      selected = 0;
+      break;
+    case _KEY_END:
+      selected = dir_info_len - 1;
+      scroll = dir_info_len >= MAX_PER_SCREEN
+        ? dir_info_len - MAX_PER_SCREEN : 0;
+      break;
+    case _KEY_UP:
+      if (!selected)
+        continue;
+      if (--selected < scroll)
+        scroll = selected;
+      break;
+    case _KEY_DOWN:
+      if (selected == dir_info_len - 1)
+        continue;
+      if (++selected >= scroll + MAX_PER_SCREEN)
+        ++scroll;
+      break;
+    case _KEY_PUP:
+      selected = selected >= MAX_PER_SCREEN
+        ? selected - MAX_PER_SCREEN : 0;
+      scroll = scroll >= MAX_PER_SCREEN
+        ? scroll - MAX_PER_SCREEN : 0;
+      break;
+    case _KEY_PDOWN:
+      if ((selected += MAX_PER_SCREEN) >= dir_info_len)
+        selected = dir_info_len - 1;
+      if ((scroll += MAX_PER_SCREEN) > selected)
+        scroll = selected;
+      break;
+    case 'q':
+      _clear_screen();
+      return;
+    default:
+      continue;
+    }
+    paint_screen();
+  }
+}
\ No newline at end of file
-- 
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