Adapt old osc52 implementation to swapper and rustbox era

OSC52 support was implemented before two major refactors in tmux-thubs:

- Decouple tmux-thumbs from tmux
- Removal of rustbox with termion

I'm not sure if is the right decision, but I moved the arguments to
swapper land because it looks like more tmux related. If it makes sense
for other terminals to support this we can move it back.

The question we need to answer here if it makes sense for standalone `thumbs`:

```
cat sample/test1 | ./target/release/thumbs --osc52
```

Cargo.lock

@@ -26,6 +26,11 @@ dependencies = [
  "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "base64"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "bitflags"
 version = "1.2.1"
@@ -138,6 +143,7 @@ dependencies = [
 name = "thumbs"
 version = "0.4.1"
 dependencies = [
+ "base64 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "clap 2.33.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "regex 1.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "termion 1.5.5 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -176,6 +182,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum aho-corasick 0.7.10 (registry+https://github.com/rust-lang/crates.io-index)" = "8716408b8bc624ed7f65d223ddb9ac2d044c0547b6fa4b0d554f3a9540496ada"
 "checksum ansi_term 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ee49baf6cb617b853aa8d93bf420db2383fab46d314482ca2803b40d5fde979b"
 "checksum atty 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)" = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
+"checksum base64 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b41b7ea54a0c9d92199de89e20e58d49f02f8e699814ef3fdf266f6f748d15c7"
 "checksum bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
 "checksum clap 2.33.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5067f5bb2d80ef5d68b4c87db81601f0b75bca627bc2ef76b141d7b846a3c6d9"
 "checksum hermit-abi 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)" = "61565ff7aaace3525556587bd2dc31d4a07071957be715e63ce7b1eccf51a8f4"

src/main.rs

@@ -10,7 +10,6 @@ mod view;
 use self::clap::{App, Arg};
 use clap::crate_version;
 use std::fs::OpenOptions;
-use std::io::prelude::*;
 use std::io::{self, Read, Write};
 
 fn app_args<'a>() -> clap::ArgMatches<'a> {
@@ -85,12 +84,6 @@ fn app_args<'a>() -> clap::ArgMatches<'a> {
         .long("unique")
         .short("u"),
     )
-    .arg(
-      Arg::with_name("osc52")
-        .help("Print OSC52 copy escape sequence in addition to running the pick command")
-        .long("osc52")
-        .short("o"),
-    )
     .arg(
       Arg::with_name("position")
         .help("Hint position")
@@ -131,7 +124,6 @@ fn main() {
   let multi = args.is_present("multi");
   let reverse = args.is_present("reverse");
   let unique = args.is_present("unique");
-  let osc52 = args.is_present("osc52");
   let contrast = args.is_present("contrast");
   let regexp = if let Some(items) = args.values_of("regexp") {
     items.collect::<Vec<_>>()
@@ -190,32 +182,6 @@ fn main() {
       .collect::<Vec<_>>()
       .join("\n");
 
-    if osc52 {
-      let base64_text = base64::encode(text.as_bytes());
-      let osc_seq = format!("\x1b]52;0;{}\x07", base64_text);
-      let tmux_seq = format!("\x1bPtmux;{}\x1b\\", osc_seq.replace("\x1b", "\x1b\x1b"));
-
-      // When the user selects a match:
-      // 1. The `rustbox` object created in the `viewbox` above is dropped.
-      // 2. During its `drop`, the `rustbox` object sends a CSI 1049 escape
-      //    sequence to tmux.
-      // 3. This escape sequence causes the `window_pane_alternate_off` function
-      //    in tmux to be called.
-      // 4. In `window_pane_alternate_off`, tmux sets the needs-redraw flag in the
-      //    pane.
-      // 5. If we print the OSC copy escape sequence before the redraw is completed,
-      //    tmux will *not* send the sequence to the host terminal. See the following
-      //    call chain in tmux: `input_dcs_dispatch` -> `screen_write_rawstring`
-      //    -> `tty_write` -> `tty_client_ready`. In this case, `tty_client_ready`
-      //    will return false, thus preventing the escape sequence from being sent.
-      //
-      // Therefore, for now we wait a little bit here for the redraw to finish.
-      std::thread::sleep(std::time::Duration::from_millis(100));
-
-      std::io::stdout().write_all(tmux_seq.as_bytes()).unwrap();
-      std::io::stdout().flush().unwrap();
-    }
-
     if let Some(target) = target {
       let mut file = OpenOptions::new()
         .create(true)

src/swapper.rs

@@ -1,5 +1,8 @@
 extern crate clap;
 
+use std::fs::File;
+
+use std::io::Write;
 use self::clap::{App, Arg};
 use clap::crate_version;
 use regex::Regex;
@@ -47,6 +50,7 @@ pub struct Swapper<'a> {
   dir: String,
   command: String,
   upcase_command: String,
+  osc52: bool,
   active_pane_id: Option<String>,
   active_pane_height: Option<i32>,
   active_pane_scroll_position: Option<i32>,
@@ -57,7 +61,7 @@ pub struct Swapper<'a> {
 }
 
 impl<'a> Swapper<'a> {
-  fn new(executor: Box<&'a mut dyn Executor>, dir: String, command: String, upcase_command: String) -> Swapper {
+  fn new(executor: Box<&'a mut dyn Executor>, dir: String, command: String, upcase_command: String, osc52: bool) -> Swapper {
     let since_the_epoch = SystemTime::now()
       .duration_since(UNIX_EPOCH)
       .expect("Time went backwards");
@@ -68,6 +72,7 @@ impl<'a> Swapper<'a> {
       dir,
       command,
       upcase_command,
+      osc52,
       active_pane_id: None,
       active_pane_height: None,
       active_pane_scroll_position: None,
@@ -247,12 +252,44 @@ impl<'a> Swapper<'a> {
     self.executor.execute(params);
   }
 
+  pub fn send_osc52(&mut self) {
+  }
+
+
   pub fn execute_command(&mut self) {
     let content = self.content.clone().unwrap();
     let mut splitter = content.splitn(2, ':');
 
     if let Some(upcase) = splitter.next() {
       if let Some(text) = splitter.next() {
+        if self.osc52 {
+          let base64_text = base64::encode(text.as_bytes());
+          let osc_seq = format!("\x1b]52;0;{}\x07", base64_text);
+          let tmux_seq = format!("\x1bPtmux;{}\x1b\\", osc_seq.replace("\x1b", "\x1b\x1b"));
+
+          // FIXME: Review if this comment is still rellevant
+          //
+          // When the user selects a match:
+          // 1. The `rustbox` object created in the `viewbox` above is dropped.
+          // 2. During its `drop`, the `rustbox` object sends a CSI 1049 escape
+          //    sequence to tmux.
+          // 3. This escape sequence causes the `window_pane_alternate_off` function
+          //    in tmux to be called.
+          // 4. In `window_pane_alternate_off`, tmux sets the needs-redraw flag in the
+          //    pane.
+          // 5. If we print the OSC copy escape sequence before the redraw is completed,
+          //    tmux will *not* send the sequence to the host terminal. See the following
+          //    call chain in tmux: `input_dcs_dispatch` -> `screen_write_rawstring`
+          //    -> `tty_write` -> `tty_client_ready`. In this case, `tty_client_ready`
+          //    will return false, thus preventing the escape sequence from being sent.
+          //
+          // Therefore, for now we wait a little bit here for the redraw to finish.
+          std::thread::sleep(std::time::Duration::from_millis(100));
+
+          std::io::stdout().write_all(tmux_seq.as_bytes()).unwrap();
+          std::io::stdout().flush().unwrap();
+        }
+
         let execute_command = if upcase.trim_end() == "true" {
           self.upcase_command.clone()
         } else {
@@ -302,7 +339,7 @@ mod tests {
   fn retrieve_active_pane() {
     let last_command_outputs = vec!["%97:100:24:1:active\n%106:100:24:1:nope\n%107:100:24:1:nope\n".to_string()];
     let mut executor = TestShell::new(last_command_outputs);
-    let mut swapper = Swapper::new(Box::new(&mut executor), "".to_string(), "".to_string(), "".to_string());
+    let mut swapper = Swapper::new(Box::new(&mut executor), "".to_string(), "".to_string(), "".to_string(), false);
 
     swapper.capture_active_pane();
 
@@ -318,7 +355,7 @@ mod tests {
       "%106:100:24:1:nope\n%98:100:24:1:active\n%107:100:24:1:nope\n".to_string(),
     ];
     let mut executor = TestShell::new(last_command_outputs);
-    let mut swapper = Swapper::new(Box::new(&mut executor), "".to_string(), "".to_string(), "".to_string());
+    let mut swapper = Swapper::new(Box::new(&mut executor), "".to_string(), "".to_string(), "".to_string(), false);
 
     swapper.capture_active_pane();
     swapper.execute_thumbs();
@@ -352,6 +389,12 @@ fn app_args<'a>() -> clap::ArgMatches<'a> {
         .long("upcase-command")
         .default_value("tmux set-buffer {} && tmux paste-buffer"),
     )
+    .arg(
+      Arg::with_name("osc52")
+        .help("Print OSC52 copy escape sequence in addition to running the pick command")
+        .long("osc52")
+        .short("o"),
+    )
     .get_matches()
 }
 
@@ -360,6 +403,7 @@ fn main() -> std::io::Result<()> {
   let dir = args.value_of("dir").unwrap();
   let command = args.value_of("command").unwrap();
   let upcase_command = args.value_of("upcase_command").unwrap();
+  let osc52 = args.is_present("osc52");
 
   if dir.is_empty() {
     panic!("Invalid tmux-thumbs execution. Are you trying to execute tmux-thumbs directly?")
@@ -371,6 +415,7 @@ fn main() -> std::io::Result<()> {
     dir.to_string(),
     command.to_string(),
     upcase_command.to_string(),
+    osc52,
   );
 
   swapper.capture_active_pane();

tmux-thumbs.sh

@@ -4,6 +4,14 @@
 
 PARAMS=()
 
+function add-boolean-param {
+  VALUE=$(tmux show -vg @thumbs-$1 2> /dev/null)
+
+  if [[ "${VALUE}" == "1" ]]; then
+    PARAMS+=("--$1")
+  fi
+}
+
 function add-option-param {
   VALUE=$(tmux show -vg @thumbs-$1 2> /dev/null)
 
@@ -14,6 +22,7 @@ function add-option-param {
 
 add-option-param "command"
 add-option-param "upcase-command"
+add-boolean-param "osc52"
 
 # Remove empty arguments from PARAMS.
 # Otherwise, they would choke up tmux-thumbs when passed to it.