Added initial_rows, initial_cols configuration

Allows specifying the size of new windows.

Refs: https://github.com/wez/wezterm/issues/142

docs/changelog.markdown

@@ -10,7 +10,8 @@ daily) from the master branch.  It may not be usable and
 the feature set may change.  As features stabilize some
 brief notes about them may accumulate here.
 
-* No notable changes yet!
+* Added `initial_rows` and `initial_cols` config options to set the starting
+  size of new terminal windows
 
 ### 20200202-181957-765184e5
 

src/config/mod.rs

@@ -8,7 +8,7 @@ use crate::frontend::FrontEndSelection;
 use crate::keyassignment::KeyAssignment;
 use anyhow::{anyhow, bail, Context, Error};
 use lazy_static::lazy_static;
-use portable_pty::CommandBuilder;
+use portable_pty::{CommandBuilder, PtySize};
 use serde::Deserialize;
 use std;
 use std::collections::HashMap;
@@ -300,6 +300,14 @@ pub struct Config {
     /// as the positional arguments to that command.
     pub default_prog: Option<Vec<String>>,
 
+    /// Specifies the height of a new window, expressed in character cells.
+    #[serde(default = "default_initial_rows")]
+    pub initial_rows: u16,
+
+    /// Specifies the width of a new window, expressed in character cells
+    #[serde(default = "default_initial_cols")]
+    pub initial_cols: u16,
+
     #[serde(default = "default_hyperlink_rules")]
     pub hyperlink_rules: Vec<hyperlink::Rule>,
 
@@ -756,6 +764,15 @@ impl Config {
         Ok(())
     }
 
+    pub fn initial_size(&self) -> PtySize {
+        PtySize {
+            rows: self.initial_rows,
+            cols: self.initial_cols,
+            pixel_width: 0,
+            pixel_height: 0,
+        }
+    }
+
     pub fn build_prog(&self, prog: Option<Vec<&OsStr>>) -> Result<CommandBuilder, Error> {
         let mut cmd = match prog {
             Some(args) => {
@@ -808,6 +825,14 @@ fn default_scrollback_lines() -> usize {
     3500
 }
 
+fn default_initial_rows() -> u16 {
+    24
+}
+
+fn default_initial_cols() -> u16 {
+    80
+}
+
 fn default_hyperlink_rules() -> Vec<hyperlink::Rule> {
     vec![
         // URL with a protocol

src/frontend/gui/termwindow.rs

@@ -1224,11 +1224,12 @@ impl TermWindow {
     pub fn spawn_new_window(&mut self) {
         async fn new_window() -> anyhow::Result<()> {
             let mux = Mux::get().unwrap();
+            let config = crate::config::configuration();
             let fonts = Rc::new(FontConfiguration::new());
             let window_id = mux.new_empty_window();
             let tab = mux
                 .default_domain()
-                .spawn(PtySize::default(), None, None, window_id)
+                .spawn(config.initial_size(), None, None, window_id)
                 .await?;
             let front_end = front_end().expect("to be called on gui thread");
             front_end.spawn_new_window(&fonts, &tab, window_id)?;

src/main.rs

@@ -34,7 +34,6 @@ use crate::mux::Mux;
 use crate::server::client::{unix_connect_with_retry, Client};
 use crate::server::domain::{ClientDomain, ClientDomainConfig};
 use portable_pty::cmdbuilder::CommandBuilder;
-use portable_pty::PtySize;
 
 mod font;
 use crate::font::locator::FontLocatorSelection;
@@ -366,7 +365,7 @@ async fn async_run_ssh(opts: SshCommand, params: SshParameters) -> anyhow::Resul
 
     let window_id = mux.new_empty_window();
     let tab = domain
-        .spawn(PtySize::default(), cmd, None, window_id)
+        .spawn(config.initial_size(), cmd, None, window_id)
         .await?;
     let fontconfig = Rc::new(FontConfiguration::new());
     gui.spawn_new_window(&fontconfig, &tab, window_id)?;
@@ -424,7 +423,7 @@ fn run_serial(config: config::ConfigHandle, opts: &SerialCommand) -> anyhow::Res
     block_on(domain.attach())?; // FIXME: blocking
 
     let window_id = mux.new_empty_window();
-    let tab = block_on(domain.spawn(PtySize::default(), None, None, window_id))?; // FIXME: blocking
+    let tab = block_on(domain.spawn(config.initial_size(), None, None, window_id))?; // FIXME: blocking
     gui.spawn_new_window(&fontconfig, &tab, window_id)?;
 
     maybe_show_configuration_error_window();
@@ -499,10 +498,11 @@ async fn spawn_tab_in_default_domain_if_mux_is_empty(
         return Ok(());
     }
 
+    let config = config::configuration();
     let window_id = mux.new_empty_window();
     let tab = mux
         .default_domain()
-        .spawn(PtySize::default(), cmd, None, window_id)
+        .spawn(config.initial_size(), cmd, None, window_id)
         .await?;
     let fontconfig = Rc::new(FontConfiguration::new());
     front_end()