Add multi language support, match file ext with language, log file

.gitignore

@@ -1,3 +1,4 @@
 /target
 **/*.rs.bk
 .idea
+log

Cargo.lock

@@ -1,3 +1,11 @@
+[[package]]
+name = "aho-corasick"
+version = "0.6.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "memchr 2.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "argon2rs"
 version = "0.2.5"
@@ -15,6 +23,16 @@ dependencies = [
  "nodrop 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "atty"
+version = "0.2.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.45 (registry+https://github.com/rust-lang/crates.io-index)",
+ "termion 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "autocfg"
 version = "0.1.1"
@@ -74,6 +92,11 @@ dependencies = [
  "constant_time_eq 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "byteorder"
+version = "1.2.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "c_vec"
 version = "1.3.2"
@@ -89,6 +112,16 @@ name = "cfg-if"
 version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "chrono"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "num-integer 0.1.39 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "time 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "cloudabi"
 version = "0.0.3"
@@ -113,16 +146,15 @@ dependencies = [
 ]
 
 [[package]]
-name = "editor"
+name = "env_logger"
-version = "0.1.0"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "dirs 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "atty 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "plex 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "humantime 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "sdl2 0.31.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.84 (registry+https://github.com/rust-lang/crates.io-index)",
+ "termcolor 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.84 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.34 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -159,6 +191,14 @@ name = "fuchsia-zircon-sys"
 version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "humantime"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "quick-error 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "itoa"
 version = "0.4.3"
@@ -174,11 +214,34 @@ name = "lazy_static"
 version = "0.2.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "lazy_static"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "libc"
 version = "0.2.45"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "log"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cfg-if 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "memchr"
+version = "2.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cfg-if 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.45 (registry+https://github.com/rust-lang/crates.io-index)",
+ "version_check 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "nodrop"
 version = "0.1.13"
@@ -236,6 +299,11 @@ dependencies = [
  "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "quick-error"
+version = "1.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "quote"
 version = "0.6.10"
@@ -303,6 +371,14 @@ name = "redox_syscall"
 version = "0.1.50"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "redox_termios"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "redox_syscall 0.1.50 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "redox_users"
 version = "0.2.0"
@@ -314,6 +390,42 @@ dependencies = [
  "redox_syscall 0.1.50 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "regex"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "aho-corasick 0.6.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memchr 2.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex-syntax 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "thread_local 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "utf8-ranges 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "regex-syntax"
+version = "0.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "ucd-util 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "rider"
+version = "0.1.0"
+dependencies = [
+ "dirs 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "env_logger 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "plex 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand 0.5.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "sdl2 0.31.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.84 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.84 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.34 (registry+https://github.com/rust-lang/crates.io-index)",
+ "simplelog 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "rustc-demangle"
 version = "0.1.13"
@@ -376,6 +488,16 @@ dependencies = [
  "serde 1.0.84 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "simplelog"
+version = "0.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "chrono 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "term 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "syn"
 version = "0.14.9"
@@ -407,16 +529,76 @@ dependencies = [
  "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "term"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "byteorder 1.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "termcolor"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "wincolor 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "termion"
+version = "1.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.45 (registry+https://github.com/rust-lang/crates.io-index)",
+ "redox_syscall 0.1.50 (registry+https://github.com/rust-lang/crates.io-index)",
+ "redox_termios 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "thread_local"
+version = "0.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "time"
+version = "0.1.41"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.45 (registry+https://github.com/rust-lang/crates.io-index)",
+ "redox_syscall 0.1.50 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "ucd-util"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "unicode-xid"
 version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "utf8-ranges"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "vec_map"
 version = "0.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "version_check"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "winapi"
 version = "0.3.6"
@@ -431,14 +613,33 @@ name = "winapi-i686-pc-windows-gnu"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "winapi-util"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "winapi-x86_64-pc-windows-gnu"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "wincolor"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi-util 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
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 "checksum quote 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)" = "53fa22a1994bd0f9372d7a816207d8a2677ad0325b073f5c5332760f0fb62b5c"
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@@ -476,7 +685,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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+"checksum regex 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "37e7cbbd370869ce2e8dff25c7018702d10b21a20ef7135316f8daecd6c25b7f"
+"checksum regex-syntax 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)" = "4e47a2ed29da7a9e1960e1639e7a982e6edc6d49be308a3b02daf511504a16d1"
 "checksum rustc-demangle 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)" = "adacaae16d02b6ec37fdc7acfcddf365978de76d1983d3ee22afc260e1ca9619"
 "checksum ryu 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)" = "eb9e9b8cde282a9fe6a42dd4681319bfb63f121b8a8ee9439c6f4107e58a46f7"
 "checksum scoped_threadpool 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)" = "1d51f5df5af43ab3f1360b429fa5e0152ac5ce8c0bd6485cae490332e96846a8"
@@ -485,11 +697,22 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum serde 1.0.84 (registry+https://github.com/rust-lang/crates.io-index)" = "0e732ed5a5592c17d961555e3b552985baf98d50ce418b7b655f31f6ba7eb1b7"
 "checksum serde_derive 1.0.84 (registry+https://github.com/rust-lang/crates.io-index)" = "b4d6115a3ca25c224e409185325afc16a0d5aaaabc15c42b09587d6f1ba39a5b"
 "checksum serde_json 1.0.34 (registry+https://github.com/rust-lang/crates.io-index)" = "bdf540260cfee6da923831f4776ddc495ada940c30117977c70f1313a6130545"
+"checksum simplelog 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)" = "2e95345f185d5adeb8ec93459d2dc99654e294cc6ccf5b75414d8ea262de9a13"
 "checksum syn 0.14.9 (registry+https://github.com/rust-lang/crates.io-index)" = "261ae9ecaa397c42b960649561949d69311f08eeaea86a65696e6e46517cf741"
 "checksum syn 0.15.23 (registry+https://github.com/rust-lang/crates.io-index)" = "9545a6a093a3f0bd59adb472700acc08cad3776f860f16a897dfce8c88721cbc"
 "checksum synstructure 0.10.1 (registry+https://github.com/rust-lang/crates.io-index)" = "73687139bf99285483c96ac0add482c3776528beac1d97d444f6e91f203a2015"
+"checksum term 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "5e6b677dd1e8214ea1ef4297f85dbcbed8e8cdddb561040cc998ca2551c37561"
+"checksum termcolor 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "4096add70612622289f2fdcdbd5086dc81c1e2675e6ae58d6c4f62a16c6d7f2f"
+"checksum termion 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "689a3bdfaab439fd92bc87df5c4c78417d3cbe537487274e9b0b2dce76e92096"
+"checksum thread_local 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "c6b53e329000edc2b34dbe8545fd20e55a333362d0a321909685a19bd28c3f1b"
+"checksum time 0.1.41 (registry+https://github.com/rust-lang/crates.io-index)" = "847da467bf0db05882a9e2375934a8a55cffdc9db0d128af1518200260ba1f6c"
+"checksum ucd-util 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "535c204ee4d8434478593480b8f86ab45ec9aae0e83c568ca81abf0fd0e88f86"
 "checksum unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
+"checksum utf8-ranges 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "796f7e48bef87609f7ade7e06495a87d5cd06c7866e6a5cbfceffc558a243737"
 "checksum vec_map 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "cac5efe5cb0fa14ec2f84f83c701c562ee63f6dcc680861b21d65c682adfb05f"
+"checksum version_check 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "914b1a6776c4c929a602fafd8bc742e06365d4bcbe48c30f9cca5824f70dc9dd"
 "checksum winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "92c1eb33641e276cfa214a0522acad57be5c56b10cb348b3c5117db75f3ac4b0"
 "checksum winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+"checksum winapi-util 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "afc5508759c5bf4285e61feb862b6083c8480aec864fa17a81fdec6f69b461ab"
 "checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+"checksum wincolor 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "561ed901ae465d6185fa7864d63fbd5720d0ef718366c9a4dc83cf6170d7e9ba"

Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "editor"
+name = "rider"
 version = "0.1.0"
 authors = ["Adrian Wozniak <adrian.wozniak@ita-prog.pl>"]
 edition = "2018"
@@ -11,6 +11,9 @@ dirs = "*"
 serde = "*"
 serde_json = "*"
 serde_derive = "*"
+log = "*"
+env_logger = "*"
+simplelog = "*"
 
 [dependencies.sdl2]
 version = "0.31.0"

src/app/app_state.rs

@@ -1,15 +1,17 @@
+use crate::app::caret_manager;
+use crate::app::file_content_manager;
 use crate::app::{UpdateResult, WindowCanvas};
 use crate::config::Config;
 use crate::renderer::Renderer;
 use crate::ui::caret::Caret;
+use crate::ui::caret::{CaretPosition, MoveDirection};
 use crate::ui::file::editor_file::EditorFile;
 use crate::ui::file::*;
 use crate::ui::menu_bar::MenuBar;
-use crate::ui::caret::{CaretPosition, MoveDirection};
 use crate::ui::text_character::TextCharacter;
 use crate::ui::*;
 use sdl2::rect::{Point, Rect};
-use sdl2::VideoSubsystem;
+use sdl2::VideoSubsystem as VS;
 use std::boxed::Box;
 use std::rc::Rc;
 use std::sync::Arc;
@@ -35,152 +37,37 @@ impl AppState {
 
     pub fn open_file(&mut self, file_path: String) {
         use std::fs::read_to_string;
+
         if let Ok(buffer) = read_to_string(&file_path) {
             let file = EditorFile::new(file_path.clone(), buffer, self.config.clone());
             self.current_file = self.files.len();
             self.files.push(file);
+        } else {
+            eprintln!("Failed to open file: {}", file_path);
         };
     }
 
-    pub fn caret(&mut self) -> &mut Caret {
+    pub fn config(&self) -> &Rc<Config> {
+        &self.config
+    }
+
+    pub fn caret(&self) -> &Caret {
+        &self.caret
+    }
+
+    pub fn caret_mut(&mut self) -> &mut Caret {
         &mut self.caret
     }
 
-    pub fn delete_front(&mut self) {
+    pub fn current_file(&self) -> Option<&EditorFile> {
-        let file: &mut EditorFile = if let Some(file) = self.files.get_mut(self.current_file) {
-            file
-        } else {
-            return;
-        };
-        let mut buffer: String = file.buffer();
-        let caret: &mut Caret = &mut self.caret;
-        let position: CaretPosition = caret.position().clone();
-        if position.text_position() == 0 {
-            return;
-        }
-        let c: char = buffer.chars().collect::<Vec<char>>()[position.text_position() - 1];
-        buffer.remove(position.text_position() - 1);
-        let position = match c {
-            '\n' => CaretPosition::new(
-                position.text_position() - 1,
-                position.line_number() - 1,
-                0,
-            ),
-            _ => CaretPosition::new(
-                position.text_position() - 1,
-                position.line_number(),
-                position.line_position(),
-            )
-        };
-
-        match file.get_character_at(position.text_position()) {
-            Some(character) => {
-                let dest: &Rect = character.dest();
-                caret.move_caret(position, Point::new(dest.x(), dest.y()));
-            }
-            _ => {
-                caret.reset_caret();
-            }
-        }
-        let new_file = EditorFile::new(file.path(), buffer, self.config.clone());
-        self.files[self.current_file] = new_file;
-    }
-
-    pub fn delete_back(&mut self) {
-        let file: &mut EditorFile = if let Some(file) = self.files.get_mut(self.current_file) {
-            file
-        } else {
-            return;
-        };
-        let mut buffer: String = file.buffer();
-        let caret: &mut Caret = &mut self.caret;
-        let position: usize = caret.text_position();
-        if position >= buffer.len() {
-            return;
-        }
-        buffer.remove(position);
-        let new_file = EditorFile::new(file.path(), buffer, self.config.clone());
-        self.files[self.current_file] = new_file;
-    }
-
-    pub fn insert_text(&mut self, text: String, renderer: &mut Renderer) {
-        let file: &mut EditorFile = if let Some(file) = self.files.get_mut(self.current_file) {
-            file
-        } else {
-            return;
-        };
-        let mut buffer: String = file.buffer();
-        let caret: &mut Caret = &mut self.caret;
-
-        let current = match file.get_character_at(caret.text_position()) {
-            Some(c) => c,
-            _ => return,
-        };
-        let mut pos = Point::new(current.dest().x(), current.dest().y());
-        let mut position: CaretPosition = caret.position().clone();
-        for character in text.chars() {
-            buffer.insert(position.text_position(), character);
-            if let Some(rect) = get_text_character_rect(character, renderer) {
-                pos = pos + Point::new(rect.width() as i32, 0);
-                position = CaretPosition::new(
-                    position.text_position() + 1,
-                    position.line_number(),
-                    position.line_position(),
-                );
-                caret.move_caret(position, pos.clone());
-            }
-        }
-
-        let new_file = EditorFile::new(file.path(), buffer, self.config.clone());
-        self.files[self.current_file] = new_file;
-    }
-
-    pub fn insert_new_line(&mut self, renderer: &mut Renderer) {
-        let file: &mut EditorFile = if let Some(file) = self.files.get_mut(self.current_file) {
-            file
-        } else {
-            return;
-        };
-        let mut buffer: String = file.buffer();
-        let caret: &mut Caret = &mut self.caret;
-
-        let current = match file.get_character_at(caret.text_position()) {
-            Some(c) => c,
-            _ => return,
-        };
-        let mut pos = Point::new(current.dest().x(), current.dest().y());
-        let mut position: CaretPosition = caret.position().clone();
-        buffer.insert(position.text_position(), '\n');
-        if let Some(rect) = get_text_character_rect('\n', renderer) {
-            pos = Point::new(
-                self.config.editor_left_margin(),
-                pos.y() + rect.height() as i32,
-            );
-            position = CaretPosition::new(
-                position.text_position(),
-                position.line_number() + 1,
-                0,
-            );
-            caret.move_caret(position, pos.clone());
-        }
-
-        let new_file = EditorFile::new(file.path(), buffer, self.config.clone());
-        self.files[self.current_file] = new_file;
-    }
-
-    fn current_file(&self) -> Option<&EditorFile> {
         self.files.get(self.current_file)
     }
 
-    fn current_file_mut(&mut self) -> Option<&mut EditorFile> {
+    pub fn current_file_mut(&mut self) -> Option<&mut EditorFile> {
         self.files.get_mut(self.current_file)
     }
 
-    fn on_editor_clicked(
+    fn on_editor_clicked(&mut self, point: &Point, video_subsystem: &mut VS) -> UpdateResult {
-        &mut self,
-        point: &Point,
-        video_subsystem: &mut VideoSubsystem,
-    ) -> UpdateResult {
         let current_file: &mut EditorFile = if let Some(current_file) = self.current_file_mut() {
             current_file
         } else {
@@ -204,49 +91,30 @@ impl AppState {
     pub fn move_caret(&mut self, dir: MoveDirection) {
         match dir {
             MoveDirection::Left => {}
-            MoveDirection::Right =>
+            MoveDirection::Right => caret_manager::move_caret_right(self),
-                self.move_caret_right(),
             MoveDirection::Up => {}
             MoveDirection::Down => {}
         }
     }
 
-    fn move_caret_right(&mut self) {
+    pub fn delete_front(&mut self) {
-        let file: &EditorFile = match self.current_file() {
+        file_content_manager::delete_front(self);
-            None => return,
-            Some(f) => f,
-        };
-        let line = self.caret.line_number().clone();
-        let characters: Vec<&TextCharacter> = match file.get_line(&line) {
-            None =>
-                return,
-            Some(characters) => characters,
-        };
-        let mut idx = 0;
-        for (i, c) in characters.iter().enumerate() {
-            if c.position() == self.caret.text_position() {
-                idx = i + 1;
-                break;
     }
-        };
+
-        let text_character: &TextCharacter = match characters.get(idx) {
+    pub fn delete_back(&mut self) {
-            Some(text_character) => text_character,
+        file_content_manager::delete_back(self);
-            None => return,
-        };
-        let line = text_character.line() - self.caret.line_number();
-        let pos = self.caret
-            .position()
-            .moved(1, line, 0);
-        let mut d: Rect = text_character.dest().clone();
-        if text_character.is_new_line() {
-            let prev = match characters.get(idx - 1) {
-                Some(c) => c,
-                _ => return,
-            };
-            d = prev.dest().clone();
-            d.set_x(d.x() + d.width() as i32);
     }
-        self.caret.move_caret(pos, Point::new(d.x(), d.y()));
+
+    pub fn insert_text(&mut self, text: String, renderer: &mut Renderer) {
+        file_content_manager::insert_text(self, text, renderer);
+    }
+
+    pub fn insert_new_line(&mut self, renderer: &mut Renderer) {
+        file_content_manager::insert_new_line(self, renderer);
+    }
+
+    pub fn replace_current_file(&mut self, file: EditorFile) {
+        self.files[self.current_file] = file;
     }
 }
 
@@ -273,11 +141,7 @@ impl Update for AppState {
 }
 
 impl AppState {
-    pub fn on_left_click(
+    pub fn on_left_click(&mut self, point: &Point, video_subsystem: &mut VS) -> UpdateResult {
-        &mut self,
-        point: &Point,
-        video_subsystem: &mut VideoSubsystem,
-    ) -> UpdateResult {
         if self.menu_bar.is_left_click_target(point) {
             video_subsystem.text_input().stop();
             return self.menu_bar.on_left_click(point);

src/app/caret_manager.rs

@@ -0,0 +1,54 @@
+use crate::app::AppState;
+use crate::ui::file::editor_file::EditorFile;
+use crate::ui::text_character::TextCharacter;
+use sdl2::rect::{Point, Rect};
+
+pub fn move_caret_right(app_state: &mut AppState) {
+    let file: &EditorFile = match app_state.current_file() {
+        None => return,
+        Some(f) => f,
+    };
+    let line = match file.get_character_at(app_state.caret().text_position()) {
+        Some(t) if t.is_new_line() => app_state.caret().line_number().clone() + 1,
+        Some(_) => app_state.caret().line_number().clone(),
+        None => 0,
+    };
+
+    let characters: Vec<&TextCharacter> = match file.get_line(&line) {
+        None => return,
+        Some(characters) => characters,
+    };
+    let mut idx = 0;
+    for (i, c) in characters.iter().enumerate() {
+        if c.position() == app_state.caret().text_position() {
+            idx = i + 1;
+            break;
+        }
+    }
+    let text_character: &TextCharacter = match characters.get(idx) {
+        Some(text_character) => text_character,
+        None => return,
+    };
+    let line = line - app_state.caret().line_number();
+    let pos = app_state.caret().position().moved(1, line as i32, 0);
+    let mut d: Rect = text_character.dest().clone();
+    if text_character.is_new_line() && idx > 0 {
+        let prev = match characters.get(idx - 1) {
+            Some(c) => c,
+            _ => return,
+        };
+        d = prev.dest().clone();
+        d.set_x(d.x() + d.width() as i32);
+    }
+    app_state
+        .caret_mut()
+        .move_caret(pos, Point::new(d.x(), d.y()));
+}
+
+pub fn move_caret_left(app_state: &mut AppState) {
+    let _file: &EditorFile = match app_state.current_file() {
+        None => return,
+        Some(f) => f,
+    };
+    let _line = app_state.caret().line_number();
+}

src/app/file_content_manager.rs

@@ -0,0 +1,143 @@
+use crate::app::AppState;
+use crate::renderer::Renderer;
+use crate::ui::caret::Caret;
+use crate::ui::caret::CaretPosition;
+use crate::ui::file::editor_file::EditorFile;
+use crate::ui::get_text_character_rect;
+use crate::ui::text_character::TextCharacter;
+use sdl2::rect::Point;
+use sdl2::rect::Rect;
+
+fn get_character_at(app_state: &mut AppState, index: usize) -> Option<&TextCharacter> {
+    match app_state.current_file() {
+        None => return None,
+        Some(f) => f,
+    }
+    .get_character_at(index)
+}
+
+fn current_file_path(app_state: &mut AppState) -> String {
+    match app_state.current_file() {
+        Some(f) => f.path(),
+        _ => String::new(),
+    }
+}
+
+pub fn delete_front(app_state: &mut AppState) {
+    let mut buffer: String = if let Some(file) = app_state.current_file() {
+        file
+    } else {
+        return;
+    }
+    .buffer();
+    let position: CaretPosition = app_state.caret().position().clone();
+    if position.text_position() == 0 {
+        return;
+    }
+    let c: char = buffer.chars().collect::<Vec<char>>()[position.text_position() - 1];
+    buffer.remove(position.text_position() - 1);
+    let position = match c {
+        '\n' if position.text_position() > 0 && position.line_number() > 0 => {
+            position.moved(-1, -1, 0)
+        }
+        '\n' => position.clone(),
+        _ if position.text_position() > 0 => position.moved(-1, 0, 0),
+        _ => position.moved(0, 0, 0),
+    };
+
+    let move_to = match get_character_at(app_state, position.text_position()) {
+        Some(character) => {
+            let dest: &Rect = character.dest();
+            Some((position, Point::new(dest.x(), dest.y())))
+        }
+        _ => None,
+    };
+    match move_to {
+        Some((position, point)) => app_state.caret_mut().move_caret(position, point),
+        None => app_state.caret_mut().reset_caret(),
+    };
+    let new_file = EditorFile::new(
+        current_file_path(app_state),
+        buffer,
+        app_state.config().clone(),
+    );
+    app_state.replace_current_file(new_file);
+}
+
+pub fn delete_back(app_state: &mut AppState) {
+    let file: &EditorFile = if let Some(file) = app_state.current_file() {
+        file
+    } else {
+        return;
+    };
+    let mut buffer: String = file.buffer();
+    let position: usize = app_state.caret().text_position();
+    if position >= buffer.len() {
+        return;
+    }
+    buffer.remove(position);
+    let new_file = EditorFile::new(file.path(), buffer, app_state.config().clone());
+    app_state.replace_current_file(new_file);
+}
+
+pub fn insert_text(app_state: &mut AppState, text: String, renderer: &mut Renderer) {
+    let mut buffer: String = if let Some(file) = app_state.current_file() {
+        file
+    } else {
+        return;
+    }
+    .buffer();
+    let current = match get_character_at(app_state, app_state.caret().text_position()) {
+        Some(c) => c,
+        _ => return,
+    };
+    let mut pos = Point::new(current.dest().x(), current.dest().y());
+    let mut position: CaretPosition = app_state.caret().position().clone();
+    for character in text.chars() {
+        buffer.insert(position.text_position(), character);
+        if let Some(rect) = get_text_character_rect(character, renderer) {
+            pos = pos + Point::new(rect.width() as i32, 0);
+            position = position.moved(1, 0, 0);
+            app_state.caret_mut().move_caret(position, pos.clone());
+        }
+    }
+
+    let new_file = EditorFile::new(
+        current_file_path(app_state),
+        buffer,
+        app_state.config().clone(),
+    );
+
+    app_state.replace_current_file(new_file);
+}
+
+pub fn insert_new_line(app_state: &mut AppState, renderer: &mut Renderer) {
+    let mut buffer: String = if let Some(file) = app_state.current_file() {
+        file
+    } else {
+        return;
+    }
+    .buffer();
+    let current = match get_character_at(app_state, app_state.caret().text_position()) {
+        Some(c) => c,
+        _ => return,
+    };
+    let mut pos = Point::new(current.dest().x(), current.dest().y());
+    let mut position: CaretPosition = app_state.caret().position().clone();
+    buffer.insert(position.text_position(), '\n');
+    if let Some(rect) = get_text_character_rect('\n', renderer) {
+        pos = Point::new(
+            app_state.config().editor_left_margin(),
+            pos.y() + rect.height() as i32,
+        );
+        position = position.moved(0, 1, 0);
+        app_state.caret_mut().move_caret(position, pos.clone());
+    }
+
+    let new_file = EditorFile::new(
+        current_file_path(app_state),
+        buffer,
+        app_state.config().clone(),
+    );
+    app_state.replace_current_file(new_file);
+}

src/app/mod.rs

@@ -1,9 +1,9 @@
-use crate::app::app_state::AppState;
+pub use crate::app::app_state::AppState;
-use crate::config::Config;
+pub use crate::config::Config;
-use crate::renderer::Renderer;
+pub use crate::renderer::Renderer;
 use crate::themes::*;
-use crate::ui::*;
 use crate::ui::caret::{CaretPosition, MoveDirection};
+use crate::ui::*;
 
 use std::rc::Rc;
 use std::thread::sleep;
@@ -22,6 +22,8 @@ use sdl2::EventPump;
 use sdl2::{Sdl, TimerSubsystem, VideoSubsystem};
 
 pub mod app_state;
+pub mod caret_manager;
+pub mod file_content_manager;
 
 pub type WindowCanvas = Canvas<Window>;
 
@@ -202,4 +204,8 @@ impl Application {
         }
         UpdateResult::NoOp
     }
+
+    pub fn config(&self) -> &Rc<Config> {
+        &self.config
+    }
 }

src/config/creator.rs

@@ -15,6 +15,10 @@ pub fn create() {
             .unwrap_or_else(|_| panic!("Cannot create fonts config directory"));
         write_default_fonts();
     }
+
+    if !log_dir().exists() {
+        fs::create_dir_all(&log_dir()).unwrap_or_else(|_| panic!("Cannot create log directory"));
+    }
 }
 
 fn write_default_fonts() {

src/config/directories.rs

@@ -1,6 +1,12 @@
 use dirs;
 use std::path::PathBuf;
 
+pub fn log_dir() -> PathBuf {
+    let mut log_dir = config_dir();
+    log_dir.push("log");
+    log_dir
+}
+
 pub fn themes_dir() -> PathBuf {
     let mut themes_dir = config_dir();
     themes_dir.push("themes");

src/config/mod.rs

@@ -1,10 +1,14 @@
+use crate::lexer::Language;
 use crate::themes::Theme;
 use dirs;
+use std::collections::HashMap;
 use std::fs;
 
 mod creator;
 pub mod directories;
 
+type LanguageMapping = HashMap<String, Language>;
+
 #[derive(Debug, Clone)]
 pub struct EditorConfig {
     character_size: u16,
@@ -19,7 +23,7 @@ impl EditorConfig {
         let mut default_font_path = directories::fonts_dir();
         default_font_path.push("DejaVuSansMono.ttf");
         Self {
-            character_size: 24,
+            character_size: 16,
             font_path: default_font_path.to_str().unwrap().to_string(),
             current_theme: "railscasts".to_string(),
             margin_left: 10,
@@ -55,18 +59,25 @@ pub struct Config {
     menu_height: u16,
     editor_config: EditorConfig,
     theme: Theme,
+    extensions_mapping: LanguageMapping,
 }
 
 impl Config {
     pub fn new() -> Self {
         creator::create();
         let editor_config = EditorConfig::new();
+        let mut extensions_mapping = HashMap::new();
+        extensions_mapping.insert(".".to_string(), Language::PlainText);
+        extensions_mapping.insert("txt".to_string(), Language::PlainText);
+        extensions_mapping.insert("rs".to_string(), Language::Rust);
+
         Self {
             width: 1024,
             height: 860,
             menu_height: 60,
             theme: Theme::load(editor_config.current_theme().clone()),
             editor_config,
+            extensions_mapping,
         }
     }
     pub fn width(&self) -> u32 {
@@ -96,4 +107,8 @@ impl Config {
     pub fn editor_left_margin(&self) -> i32 {
         self.editor_config().margin_left() as i32
     }
+
+    pub fn extensions_mapping(&self) -> &LanguageMapping {
+        &self.extensions_mapping
+    }
 }

src/lexer/mod.rs

@@ -6,6 +6,7 @@ pub mod rust_lang;
 #[derive(Debug, Clone)]
 pub enum Language {
     PlainText,
+    Rust,
 }
 
 #[derive(Debug, Clone)]
@@ -144,11 +145,14 @@ impl Token {
     }
 }
 
-pub fn parse(text: String, language: Language) -> Vec<TokenType> {
+pub fn parse(text: String, language: &Language) -> Vec<TokenType> {
     match language {
-        Language::PlainText => plain::lexer::Lexer::new(text.as_str())
+        &Language::PlainText => plain::lexer::Lexer::new(text.as_str())
             //            .inspect(|tok| println!("tok: {:?}", tok))
             .map(|t| t.0)
             .collect(),
+        &Language::Rust => rust_lang::lexer::Lexer::new(text.as_str())
+            .map(|t| t.0)
+            .collect(),
     }
 }

src/lexer/rust_lang.rs

@@ -11,7 +11,11 @@ pub mod lexer {
             token: Token::new(text.to_string(), 0, 0, 0, 0)
         }, text),
 
-        r"(let|fn|type|struct|pub|impl|for|self|Self)" => (TokenType::Keyword {
+        r"[+-/*%=]" => (TokenType::Operator {
+            token: Token::new(text.to_string(), 0, 0, 0, 0)
+        }, text),
+
+        r"(let|fn|type|struct|pub|impl|for|self|Self|mod|use|enum)" => (TokenType::Keyword {
             token: Token::new(text.to_string(), 0, 0, 0, 0)
         }, text),
 

src/main.rs

@@ -10,8 +10,16 @@ extern crate serde;
 extern crate serde_derive;
 #[macro_use]
 extern crate serde_json;
+#[macro_use]
+extern crate log;
+extern crate simplelog;
 
 use crate::app::Application;
+use crate::config::directories::log_dir;
+use log::Level;
+use simplelog::*;
+use std::fs::create_dir_all;
+use std::fs::File;
 
 pub mod app;
 pub mod config;
@@ -20,9 +28,28 @@ pub mod renderer;
 pub mod themes;
 pub mod ui;
 
+fn init_logger() {
+    let mut log_file_path = log_dir();
+    log_file_path.push("rider.log");
+
+    CombinedLogger::init(vec![
+        TermLogger::new(LevelFilter::Warn, Config::default()).unwrap(),
+        WriteLogger::new(
+            LevelFilter::Info,
+            Config::default(),
+            File::create(log_file_path).unwrap(),
+        ),
+    ])
+    .unwrap();
+}
+
 fn main() {
     let mut app = Application::new();
     app.init();
-    app.open_file("./tests/example.txt".to_string());
+
+    init_logger();
+
+    //    app.open_file("./assets/examples/example.txt".to_string());
+    app.open_file("./assets/examples/test.rs".to_string());
     app.run();
 }

src/renderer/managers.rs

@@ -127,7 +127,7 @@ impl<'l> ResourceLoader<'l, Font<'l, 'static>> for Sdl2TtfContext {
     type Args = FontDetails;
 
     fn load(&'l self, data: &FontDetails) -> Result<Font<'l, 'static>, String> {
-        println!("Loading font {}...", data.path);
+        info!("Loading font {}...", data.path);
         self.load_font(&data.path, data.size)
     }
 }
@@ -149,7 +149,9 @@ impl<'l, T> TextureManager<'l, T> {
                 let texture = self.loader.create_texture_from_surface(&surface).unwrap();
                 let resource = Rc::new(texture);
                 self.cache.insert(key, resource.clone());
-                println!("texture for '{}' created", details.text);
+                for c in details.text.chars() {
+                    info!("texture for '{:?}' created", c);
+                }
                 Ok(resource)
             },
             Ok,

src/themes/config_creator.rs

@@ -102,9 +102,9 @@ fn railscasts_theme() -> Theme {
             },
             identifier: ThemeConfig {
                 color: SerdeColor {
-                    r: 21,
+                    r: 121,
-                    g: 21,
+                    g: 121,
-                    b: 21,
+                    b: 121,
                     a: 0,
                 },
                 italic: false,
@@ -112,9 +112,9 @@ fn railscasts_theme() -> Theme {
             },
             literal: ThemeConfig {
                 color: SerdeColor {
-                    r: 21,
+                    r: 121,
-                    g: 21,
+                    g: 121,
-                    b: 21,
+                    b: 121,
                     a: 0,
                 },
                 italic: false,
@@ -142,9 +142,9 @@ fn railscasts_theme() -> Theme {
             },
             separator: ThemeConfig {
                 color: SerdeColor {
-                    r: 21,
+                    r: 121,
-                    g: 21,
+                    g: 121,
-                    b: 21,
+                    b: 121,
                     a: 0,
                 },
                 italic: false,

src/ui/caret.rs

@@ -6,8 +6,8 @@ use crate::ui::*;
 use sdl2::pixels::Color;
 use sdl2::rect::{Point, Rect};
 use sdl2::render::Texture;
-use std::rc::Rc;
 use std::ops::Deref;
+use std::rc::Rc;
 
 #[derive(Clone, Debug, PartialEq)]
 enum CaretState {
@@ -20,7 +20,7 @@ pub enum MoveDirection {
     Left,
     Right,
     Up,
-    Down
+    Down,
 }
 
 //#[derive(Clone, Debug, PartialEq)]
@@ -42,11 +42,11 @@ pub struct CaretPosition {
 }
 
 impl CaretPosition {
-    pub fn new(text_position: usize, line_number: usize, line_position: usize,) -> Self {
+    pub fn new(text_position: usize, line_number: usize, line_position: usize) -> Self {
         Self {
             text_position,
             line_number,
-            line_position
+            line_position,
         }
     }
 
@@ -80,11 +80,11 @@ impl CaretPosition {
         self.line_position = n;
     }
 
-    pub fn moved(&self, text_position: usize, line_number: usize, line_position: usize) -> Self {
+    pub fn moved(&self, text_position: i32, line_number: i32, line_position: i32) -> Self {
         Self {
-            text_position: self.text_position + text_position,
+            text_position: (self.text_position as i32 + text_position) as usize,
-            line_number: self.line_number + line_number,
+            line_number: (self.line_number as i32 + line_number) as usize,
-            line_position: self.line_position + line_position
+            line_position: (self.line_position as i32 + line_position) as usize,
         }
     }
 }

src/ui/file/editor_file.rs

@@ -19,9 +19,18 @@ pub struct EditorFile {
 
 impl EditorFile {
     pub fn new(path: String, buffer: String, config: Rc<Config>) -> Self {
-        let sections = vec![EditorFileSection::new(buffer.clone(), config.clone())];
+        use std::path::Path;
+
+        let p = Path::new(&path);
+        let ext = match p.extension() {
+            Some(s) => s.to_str().unwrap_or("txt"),
+            None => "txt",
+        }
+        .to_string();
+        let sections = vec![EditorFileSection::new(buffer.clone(), ext, config.clone())];
         let x = config.editor_left_margin();
         let y = config.editor_top_margin();
+
         Self {
             path,
             sections,

src/ui/file/editor_file_section.rs

@@ -17,9 +17,14 @@ pub struct EditorFileSection {
 }
 
 impl EditorFileSection {
-    pub fn new(buffer: String, config: Rc<Config>) -> Self {
+    pub fn new(buffer: String, ext: String, config: Rc<Config>) -> Self {
         use crate::lexer;
-        let lexer_tokens = lexer::parse(buffer.clone(), Language::PlainText);
+
+        let language = config
+            .extensions_mapping()
+            .get(ext.as_str())
+            .unwrap_or(&Language::PlainText);
+        let lexer_tokens = lexer::parse(buffer.clone(), language);
 
         let mut tokens: Vec<EditorFileToken> = vec![];
         for token_type in lexer_tokens {

src/ui/file/editor_file_token.rs

@@ -45,21 +45,28 @@ impl EditorFileToken {
     pub fn get_line(&self, line: &usize) -> Option<Vec<&TextCharacter>> {
         let mut vec: Vec<&TextCharacter> = vec![];
         for c in self.characters.iter() {
-            let _tmp = (line.clone(), c.line().clone(), self.token_type.is_new_line(), c.text_character());
+            let _tmp = (
-            match (line.clone(), c.line().clone(), self.token_type.is_new_line()) {
+                line.clone(),
+                c.line().clone(),
+                self.token_type.is_new_line(),
+                c.text_character(),
+            );
+            match (
+                line.clone(),
+                c.line().clone(),
+                self.token_type.is_new_line(),
+            ) {
                 (0, 0, true) => {
                     vec.push(c);
-                },
+                }
                 (a, b, true) if (a + 1) == b => {
                     vec.push(c);
-                },
+                }
-                (a, b, true) if a != (b + 1) =>
+                (a, b, true) if a != (b + 1) => (),
-                    (),
                 (a, b, false) if a == b => {
                     vec.push(c);
                 }
-                _t =>
+                _t => (),
-                    (),
             }
         }
         if vec.is_empty() {

src/ui/text_character.rs

@@ -1,10 +1,10 @@
 use crate::app::{UpdateResult, WindowCanvas};
 use crate::config::Config;
 use crate::lexer::TokenType;
-use crate::renderer::managers::{TextDetails, FontDetails};
+use crate::renderer::managers::{FontDetails, TextDetails};
 use crate::renderer::Renderer;
-use crate::ui::*;
 use crate::ui::caret::CaretPosition;
+use crate::ui::*;
 
 use sdl2::pixels::Color;
 use sdl2::rect::{Point, Rect};
@@ -168,11 +168,7 @@ impl ClickHandler for TextCharacter {
     fn on_left_click(&mut self, _point: &Point) -> UpdateResult {
         UpdateResult::MoveCaret(
             self.dest().clone(),
-            CaretPosition::new(
+            CaretPosition::new(self.position(), self.line(), 0),
-                self.position(),
-                self.line(),
-                0,
-            ),
         )
     }