file explorer mnvp, malvim fixes

also terminal ctrl+p and ctrl+n, error logging for the ipc windows, other fixes

src/bin/file_explorer.rs

@@ -1,6 +1,7 @@
 use std::vec::Vec;
 use std::vec;
 use std::fs::read_dir;
+use std::path::PathBuf;
 
 use ming_wm::window_manager::{ DrawInstructions, WindowLike, WindowLikeType };
 use ming_wm::messages::{ WindowMessage, WindowMessageResponse };
@@ -8,19 +9,32 @@ use ming_wm::framebuffer::Dimensions;
 use ming_wm::themes::ThemeInfo;
 use ming_wm::ipc::listen;
 
+struct DirectoryChild {
+  //if some, use instead of file/dir name
+  override_name: Option<String>,
+  path: PathBuf,
+  is_file: bool,
+  //can only be true if dir
+  //if true, means the contents of this dir should be visible too, even though it isn't the current path. like a tree
+  tree_open: bool,
+}
+
 #[derive(Default)]
 pub struct FileExplorer {
   dimensions: Dimensions,
-  current_path: String,
-  //current_dir_contents:
+  current_path: PathBuf,
+  current_dir_contents: Vec<DirectoryChild>,
+  //for scrolling and selecting dirs
+  position: usize,
 }
 
 impl WindowLike for FileExplorer {
   fn handle_message(&mut self, message: WindowMessage) -> WindowMessageResponse {
     match message {
       WindowMessage::Init(dimensions) => {
-        self.current_path = "/".to_string();
+        self.current_path = PathBuf::from("/");
         self.dimensions = dimensions;
+        self.current_dir_contents = self.get_current_dir_contents();
         WindowMessageResponse::JustRerender
       },
       WindowMessage::ChangeDimensions(dimensions) => {
@@ -28,16 +42,68 @@ impl WindowLike for FileExplorer {
         WindowMessageResponse::JustRerender
       },
       WindowMessage::KeyPress(key_press) => {
-        //
-        WindowMessageResponse::DoNothing
+        if key_press.key == '𐘂' { //the enter key
+          if self.current_dir_contents.len() > 0 {
+            let selected_entry = &self.current_dir_contents[self.position];
+            if !selected_entry.is_file {
+              self.current_path = selected_entry.path.clone();
+              self.current_dir_contents = self.get_current_dir_contents();
+              self.position = 0;
+              return WindowMessageResponse::JustRerender;
+            }
+          }
+          WindowMessageResponse::DoNothing
+        } else if key_press.key == 'j' {
+          //down
+          if self.position == self.current_dir_contents.len() - 1 {
+            self.position = 0;
+          } else {
+            self.position += 1;
+          }
+          WindowMessageResponse::JustRerender
+        } else if key_press.key == 'k' {
+          //up
+          if self.position == 0 {
+            self.position = self.current_dir_contents.len() - 1;
+          } else {
+            self.position -= 1;
+          }
+          WindowMessageResponse::JustRerender
+        } else {
+          WindowMessageResponse::DoNothing
+        }
       },
       _ => WindowMessageResponse::DoNothing,
     }
   }
 
   fn draw(&self, theme_info: &ThemeInfo) -> Vec<DrawInstructions> {
+    let mut instructions = Vec::new();
     //top bar with path name and editing
-    vec![]
+    //
+    //the actual files and directories
+    let mut start_y = 0;
+    let mut i = 0;
+    for entry in &self.current_dir_contents {
+      if start_y > self.dimensions[1] {
+        break;
+      }
+      let is_selected = i == self.position;
+      if is_selected {
+        instructions.push(DrawInstructions::Rect([0, start_y], [self.dimensions[0], 20], theme_info.top));
+      }
+      //unwrap_or not used because "Arguments passed to unwrap_or are eagerly evaluated", apparently
+      let name = entry.override_name.clone();
+      let name = if name.is_none() {
+        entry.path.file_name().unwrap().to_os_string().into_string().unwrap()
+      } else {
+        name.unwrap()
+      };
+      instructions.push(DrawInstructions::Text([5, start_y], vec!["times-new-roman".to_string(), "shippori-mincho".to_string()], name, if is_selected { theme_info.top_text } else { theme_info.text }, if is_selected { theme_info.top } else { theme_info.background }, None, None));
+      start_y += 20;
+      i += 1;
+    }
+    instructions
   }
 
   fn title(&self) -> String {
@@ -63,8 +129,26 @@ impl FileExplorer {
   }
 
   //should include .. if not /
-  fn read_current_dir_contents(&self) {
-    //
+  fn get_current_dir_contents(&self) -> Vec<DirectoryChild> {
+    let mut contents = Vec::new();
+    if self.current_path != PathBuf::from("/") {
+      contents.push(DirectoryChild {
+        override_name: Some("..".to_string()),
+        is_file: false,
+        tree_open: false,
+        path: self.current_path.parent().unwrap().to_owned(),
+      });
+    }
+    contents.extend(read_dir(&self.current_path).unwrap().map(|entry| {
+      let path = entry.unwrap().path();
+      DirectoryChild {
+        override_name: None,
+        is_file: path.is_file(),
+        tree_open: false,
+        path,
+      }
+    }));
+    contents
   }
 }