preview a file with Ppreview

10 files changed, 109 insertions, 21 deletions

diff --git a/config.yaml b/config.yaml
index bc9c61e..a39d053 100644
--- a/config.yaml
+++ b/config.yaml
@@ -40,3 +40,4 @@ keybindings:
   nvim: i
   sort_by: O
   symlink: S
+  preview: P
diff --git a/readme.md b/readme.md
index e1ba5cd..3bdb23c 100644
--- a/readme.md
+++ b/readme.md
@@ -78,6 +78,7 @@
   - https://github.com/KillTheMule/nvim-rs/blob/master/examples/basic.rs
   - https://neovim.io/doc/user/api.html
 - [ ] display / event separation. use async and message passing between coroutines
+- [ ] less or cat/bat a file content, window with preview
 
 ## BUGS
 
diff --git a/src/actioner.rs b/src/actioner.rs
index 490c07f..fd09ca4 100644
--- a/src/actioner.rs
+++ b/src/actioner.rs
@@ -43,6 +43,7 @@ impl Actioner {
             (keybindings.nvim, EventChar::NvimFilepicker),
             (keybindings.sort_by, EventChar::Sort),
             (keybindings.symlink, EventChar::Symlink),
+            (keybindings.preview, EventChar::Preview),
         ]);
         Self { binds }
     }
@@ -207,7 +208,7 @@ impl Actioner {
             Mode::Goto => status.exec_goto(),
             Mode::RegexMatch => status.exec_regex(),
             Mode::Jump => status.exec_jump(),
-            Mode::Normal | Mode::NeedConfirmation | Mode::Help | Mode::Sort => (),
+            Mode::Normal | Mode::NeedConfirmation | Mode::Help | Mode::Sort | Mode::Preview => (),
         }
 
         status.input.reset();
@@ -248,7 +249,7 @@ impl Actioner {
                 Some(event_char) => event_char.match_char(status),
                 None => (),
             },
-            Mode::Help => status.event_normal(),
+            Mode::Help | Mode::Preview => status.event_normal(),
             Mode::Jump => (),
             Mode::NeedConfirmation => {
                 if c == 'y' {
diff --git a/src/config.rs b/src/config.rs
index 9bc9ff8..e0fa5bb 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -50,6 +50,7 @@ use tuikit::attr::Color;
 ///   jump: j
 ///   nvim: i
 ///   sort_by: O
+///   preview: S
 #[derive(Debug, Clone)]
 pub struct Config {
     /// Color of every kind of file
@@ -200,6 +201,8 @@ pub struct Keybindings {
     pub sort_by: char,
     /// Creates asymlink
     pub symlink: char,
+    /// Preview with bat
+    pub preview: char,
 }
 
 impl Keybindings {
@@ -275,9 +278,12 @@ impl Keybindings {
         if let Some(sort_by) = yaml["sort_by"].as_str().map(|s| s.to_string()) {
             self.sort_by = sort_by.chars().next().unwrap_or('O');
         }
-        if let Some(symlink) = yaml["symblink"].as_str().map(|s| s.to_string()) {
+        if let Some(symlink) = yaml["symlink"].as_str().map(|s| s.to_string()) {
             self.symlink = symlink.chars().next().unwrap_or('S');
         }
+        if let Some(preview) = yaml["preview"].as_str().map(|s| s.to_string()) {
+            self.preview = preview.chars().next().unwrap_or('P');
+        }
     }
 
     /// Returns a new `Keybindings` instance with hardcoded values.
@@ -307,6 +313,7 @@ impl Keybindings {
             nvim: 'i',
             sort_by: 'O',
             symlink: 'S',
+            preview: 'P',
         }
     }
 }
diff --git a/src/display.rs b/src/display.rs
index e38adff..38167d0 100644
--- a/src/display.rs
+++ b/src/display.rs
@@ -1,5 +1,7 @@
 use std::cmp::min;
+use std::io::BufRead;
 
+use bat::PrettyPrinter;
 use tuikit::attr::*;
 use tuikit::term::Term;
 
@@ -46,6 +48,7 @@ impl Display {
         self.help(status);
         self.jump_list(status);
         self.completion(status);
+        self.preview(status);
     }
 
     /// Reads and returns the `tuikit::term::Term` height.
@@ -71,6 +74,10 @@ impl Display {
             Mode::NeedConfirmation => {
                 format!("Confirm {} (y/n) : ", status.last_edition)
             }
+            Mode::Preview => match status.path_content.selected_file() {
+                Some(fileinfo) => format!("{:?} {}", status.mode.clone(), fileinfo.filename),
+                None => "".to_owned(),
+            },
             _ => {
                 format!("{:?} {}", status.mode.clone(), status.input.string.clone())
             }
@@ -151,7 +158,7 @@ impl Display {
 
     /// Display the possible completion items. The currently selected one is
     /// reversed.
-    pub fn completion(&mut self, status: &Status) {
+    fn completion(&mut self, status: &Status) {
         match status.mode {
             Mode::Goto | Mode::Exec | Mode::Search => {
                 let _ = self.term.clear();
@@ -170,4 +177,28 @@ impl Display {
             _ => (),
         }
     }
+
+    /// Display a preview of a file with bat
+    fn preview(&mut self, status: &Status) {
+        if let Mode::Preview = status.mode {
+            match status.path_content.selected_file() {
+                Some(file) => {
+                    let _ = self.term.clear();
+                    self.first_line(status);
+                    let attr = Attr::default();
+                    let reader =
+                        std::io::BufReader::new(std::fs::File::open(file.path.clone()).unwrap());
+                    for (row, line) in reader.lines().enumerate() {
+                        let _ = self.term.print_with_attr(
+                            row + 1,
+                            3,
+                            &line.unwrap_or("".to_owned()),
+                            attr,
+                        );
+                    }
+                }
+                None => (),
+            }
+        }
+    }
 }
diff --git a/src/event_char.rs b/src/event_char.rs
index 7f48d5c..9b3e4fc 100644
--- a/src/event_char.rs
+++ b/src/event_char.rs
@@ -25,6 +25,7 @@ pub enum EventChar {
     NvimFilepicker,
     Sort,
     Symlink,
+    Preview,
 }
 
 impl EventChar {
@@ -54,6 +55,7 @@ impl EventChar {
             EventChar::NvimFilepicker => status.event_nvim_filepicker(),
             EventChar::Sort => status.event_sort(),
             EventChar::Symlink => status.event_symlink(),
+            EventChar::Preview => status.event_preview(),
         }
     }
 }
diff --git a/src/fileinfo.rs b/src/fileinfo.rs
index a56ffc6..ee91f03 100644
--- a/src/fileinfo.rs
+++ b/src/fileinfo.rs
@@ -306,6 +306,16 @@ impl PathContent {
             self.files[0].select();
         }
     }
+
+    /// Return the Optional FileInfo
+    /// Since the FileInfo is borrowed it won't be mutable.
+    pub fn selected_file(&self) -> Option<&FileInfo> {
+        if self.files.is_empty() {
+            None
+        } else {
+            Some(&self.files[self.selected])
+        }
+    }
 }
 
 /// Associates a filetype to `tuikit::prelude::Attr` : fg color, bg color and
diff --git a/src/help.rs b/src/help.rs
index c03b086..1424201 100644
--- a/src/help.rs
+++ b/src/help.rs
@@ -19,6 +19,8 @@ PgDown: 10 lines down
 a:      toggle hidden
 s:      shell in current directory
 o:      xdg-open this file
+i:      open in current nvim session
+P:      preview this file
 
 - Action on flagged files - 
     space:  toggle flag on a file 
diff --git a/src/mode.rs b/src/mode.rs
index 07ca789..be13bcf 100644
--- a/src/mode.rs
+++ b/src/mode.rs
@@ -31,6 +31,8 @@ pub enum Mode {
     NeedConfirmation,
     /// Change the type of sort
     Sort,
+    /// Preview a content with bat
+    Preview,
 }
 
 impl fmt::Debug for Mode {
@@ -49,6 +51,7 @@ impl fmt::Debug for Mode {
             Mode::Jump => write!(f, "Jump  :  "),
             Mode::NeedConfirmation => write!(f, "Y/N   :"),
             Mode::Sort => write!(f, "(N)ame (D)ate (S)ize (E)xt (R)ev :"),
+            Mode::Preview => write!(f, "Preview : "),
         }
     }
 }
diff --git a/src/status.rs b/src/status.rs
index c46409b..31c577a 100644
--- a/src/status.rs
+++ b/src/status.rs
@@ -188,11 +188,12 @@ impl Status {
     }
 
     pub fn event_go_to_child(&mut self) {
-        if let FileKind::Directory = self.path_content.files[self.path_content.selected].file_kind {
+        if self.path_content.files.is_empty() {
+            return;
+        }
+        if let FileKind::Directory = self.path_content.selected_file().unwrap().file_kind {
             self.path_content = PathContent::new(
-                self.path_content.files[self.path_content.selected]
-                    .path
-                    .clone(),
+                self.path_content.selected_file().unwrap().path.clone(),
                 self.show_hidden,
             );
             self.window.reset(self.path_content.files.len());
@@ -240,6 +241,12 @@ impl Status {
         self.mode = Mode::Exec
     }
 
+    pub fn event_preview(&mut self) {
+        if !self.path_content.files.is_empty() {
+            self.mode = Mode::Preview
+        }
+    }
+
     pub fn event_clear_flags(&mut self) {
         self.flagged.clear()
     }
@@ -302,7 +309,10 @@ impl Status {
     }
 
     pub fn event_toggle_flag(&mut self) {
-        self.toggle_flag_on_path(self.path_content.files[self.file_index].path.clone());
+        if self.path_content.files.is_empty() {
+            return;
+        }
+        self.toggle_flag_on_path(self.path_content.selected_file().unwrap().path.clone());
         if self.file_index < self.path_content.files.len() - WINDOW_MARGIN_TOP {
             self.file_index += 1
         }
@@ -336,9 +346,15 @@ impl Status {
     }
 
     pub fn event_open_file(&mut self) {
+        if self.path_content.files.is_empty() {
+            return;
+        }
         execute_in_child(
             &self.opener,
-            &vec![self.path_content.files[self.path_content.selected]
+            &vec![self
+                .path_content
+                .selected_file()
+                .unwrap()
                 .path
                 .to_str()
                 .unwrap()],
@@ -350,13 +366,13 @@ impl Status {
     }
 
     pub fn event_chmod(&mut self) {
+        if self.path_content.files.is_empty() {
+            return;
+        }
         self.mode = Mode::Chmod;
         if self.flagged.is_empty() {
-            self.flagged.insert(
-                self.path_content.files[self.path_content.selected]
-                    .path
-                    .clone(),
-            );
+            self.flagged
+                .insert(self.path_content.selected_file().unwrap().path.clone());
         }
     }
 
@@ -380,10 +396,13 @@ impl Status {
     }
 
     pub fn event_right_click(&mut self, row: u16) {
+        if self.path_content.files.is_empty() || row as usize > self.path_content.files.len() {
+            return;
+        }
         self.file_index = (row - 1).into();
         self.path_content.select_index(self.file_index);
         self.window.scroll_to(self.file_index);
-        if let FileKind::Directory = self.path_content.files[self.file_index].file_kind {
+        if let FileKind::Directory = self.path_content.selected_file().unwrap().file_kind {
             self.event_go_to_child()
         } else {
             self.event_open_file()
@@ -410,6 +429,9 @@ impl Status {
     }
 
     pub fn event_nvim_filepicker(&mut self) {
+        if self.path_content.files.is_empty() {
+            return;
+        }
         // "nvim-send --remote-send '<esc>:e readme.md<cr>' --servername 127.0.0.1:8888"
         let server = std::env::var("NVIM_LISTEN_ADDRESS").unwrap_or_else(|_| "".to_owned());
         if server.is_empty() {
@@ -421,7 +443,9 @@ impl Status {
                 "--remote-send",
                 &format!(
                     "<esc>:e {}<cr><esc>:close<cr>",
-                    self.path_content.files[self.file_index]
+                    self.path_content
+                        .selected_file()
+                        .unwrap()
                         .path
                         .clone()
                         .to_str()
@@ -473,10 +497,11 @@ impl Status {
     }
 
     pub fn exec_rename(&mut self) {
+        if self.path_content.files.is_empty() {
+            return;
+        }
         fs::rename(
-            self.path_content.files[self.path_content.selected]
-                .clone()
-                .path,
+            self.path_content.selected_file().unwrap().clone().path,
             self.path_content
                 .path
                 .to_path_buf()
@@ -525,11 +550,16 @@ impl Status {
     }
 
     pub fn exec_exec(&mut self) {
+        if self.path_content.files.is_empty() {
+            return;
+        }
         let exec_command = self.input.string.clone();
         let mut args: Vec<&str> = exec_command.split(' ').collect();
         let command = args.remove(0);
         args.push(
-            self.path_content.files[self.path_content.selected]
+            self.path_content
+                .selected_file()
+                .unwrap()
                 .path
                 .to_str()
                 .unwrap(),