From 9375939d1adfdd0af676eb2e0f1b432e110b3ade Mon Sep 17 00:00:00 2001
From: Nil Gradisnik <nil@layer.com>
Date: Sat, 2 Dec 2017 15:04:53 -0800
Subject: [PATCH] Using sourceview. Live render added.

---
 Cargo.lock       | 43 +++++++++++++++++++++++++++++++++++++++
 Cargo.toml       |  1 +
 src/gtk-ui.glade | 53 ++++++++++++++++++++++++++++++++----------------
 src/main.rs      | 28 ++++++++++++++++---------
 src/markdown.rs  | 14 +++++++++++--
 5 files changed, 110 insertions(+), 29 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 809148c..5853701 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -299,6 +299,23 @@ dependencies = [
  "pango 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "gtk-source-sys"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "bitflags 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cairo-sys-rs 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gdk-pixbuf-sys 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gdk-sys 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gio-sys 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "glib-sys 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gobject-sys 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gtk-sys 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.34 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pkg-config 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "gtk-sys"
 version = "0.5.0"
@@ -372,6 +389,7 @@ dependencies = [
  "comrak 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "gio 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "gtk 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "sourceview 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -524,6 +542,29 @@ dependencies = [
  "serde 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "sourceview"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "bitflags 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cairo-rs 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gdk 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gdk-pixbuf 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gdk-pixbuf-sys 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gdk-sys 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gio 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gio-sys 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "glib 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "glib-sys 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gobject-sys 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gtk 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gtk-source-sys 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gtk-sys 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.34 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pango 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "strsim"
 version = "0.6.0"
@@ -695,6 +736,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum glib-sys 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d9693049613ff52b93013cc3d2590366d8e530366d288438724b73f6c7dc4be8"
 "checksum gobject-sys 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "60d507c87a71b1143c66ed21a969be9b99a76df234b342d733e787e6c9c7d7c2"
 "checksum gtk 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "0847c507e52c1feaede13ef56fb4847742438602655449d5f1f782e8633f146f"
+"checksum gtk-source-sys 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "2b893d266bbc13de37ecd4ab7125761ce4cb924b1cf4603e73f14d13ca7d3a9c"
 "checksum gtk-sys 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "905fcfbaaad1b44ec0b4bba9e4d527d728284c62bc2ba41fccedace2b096766f"
 "checksum idna 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "014b298351066f1512874135335d62a789ffe78a9974f94b43ed5621951eaf7d"
 "checksum if_chain 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "61bb90bdd39e3af69b0172dfc6130f6cd6332bf040fbb9bdd4401d37adbd48b8"
@@ -723,6 +765,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum serde_derive 1.0.23 (registry+https://github.com/rust-lang/crates.io-index)" = "0672de7300b02bac3f3689f8faea813c4a1ea9fe0cb49e80f714231d267518a2"
 "checksum serde_derive_internals 0.17.0 (registry+https://github.com/rust-lang/crates.io-index)" = "32f1926285523b2db55df263d2aa4eb69ddcfa7a7eade6430323637866b513ab"
 "checksum serde_json 1.0.7 (registry+https://github.com/rust-lang/crates.io-index)" = "ea28ea0cca944668919bec6af209864a8dfe769fd2b0b723f36b22e20c1bf69f"
+"checksum sourceview 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "673844d773083b34c3cb3dab036c75eebb7b223343724f167915980a4586912e"
 "checksum strsim 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b4d15c810519a91cf877e7e36e63fe068815c678181439f2f29e2562147c3694"
 "checksum syn 0.11.11 (registry+https://github.com/rust-lang/crates.io-index)" = "d3b891b9015c88c576343b9b3e41c2c11a51c219ef067b264bd9c8aa9b441dad"
 "checksum synom 0.11.3 (registry+https://github.com/rust-lang/crates.io-index)" = "a393066ed9010ebaed60b9eafa373d4b1baac186dd7e008555b0f702b51945b6"
diff --git a/Cargo.toml b/Cargo.toml
index 59b5b35..a726562 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,6 +5,7 @@ authors = ["Nil Gradisnik <nil@layer.com>"]
 
 [dependencies]
 gio = "0.3"
+sourceview = "0.3"
 comrak = "0.2"
 
 [dependencies.gtk]
diff --git a/src/gtk-ui.glade b/src/gtk-ui.glade
index 34c6a10..48a004e 100644
--- a/src/gtk-ui.glade
+++ b/src/gtk-ui.glade
@@ -28,6 +28,7 @@ Author: Nil Gradisnik
 -->
 <interface>
   <requires lib="gtk+" version="3.20"/>
+  <requires lib="gtksourceview" version="3.0"/>
   <!-- interface-license-type mit -->
   <!-- interface-name markdown-rs -->
   <!-- interface-description Simple Markdown editor -->
@@ -67,10 +68,24 @@ Author: Nil Gradisnik
               <object class="GtkToolButton" id="render_button">
                 <property name="visible">True</property>
                 <property name="can_focus">False</property>
-                <property name="tooltip_text" translatable="yes">Open</property>
+                <property name="tooltip_text" translatable="yes">Render Markdown</property>
                 <property name="is_important">True</property>
                 <property name="label" translatable="yes">Render</property>
                 <property name="use_underline">True</property>
+                <property name="icon_name">view-refresh</property>
+              </object>
+              <packing>
+                <property name="expand">False</property>
+                <property name="homogeneous">True</property>
+              </packing>
+            </child>
+            <child>
+              <object class="GtkToggleToolButton" id="live_button">
+                <property name="visible">True</property>
+                <property name="can_focus">False</property>
+                <property name="tooltip_text" translatable="yes">Live Markdown</property>
+                <property name="label" translatable="yes">Live</property>
+                <property name="use_underline">True</property>
                 <property name="icon_name">media-playback-start</property>
               </object>
               <packing>
@@ -86,34 +101,38 @@ Author: Nil Gradisnik
           </packing>
         </child>
         <child>
-          <object class="GtkBox">
+          <object class="GtkPaned">
             <property name="visible">True</property>
-            <property name="can_focus">False</property>
-            <property name="homogeneous">True</property>
+            <property name="can_focus">True</property>
             <child>
               <object class="GtkScrolledWindow" id="scrolled_window_left">
                 <property name="visible">True</property>
                 <property name="can_focus">True</property>
                 <property name="shadow_type">in</property>
+                <property name="min_content_width">200</property>
                 <child>
-                  <object class="GtkTextView" id="text_view">
+                  <object class="GtkSourceView" id="text_view">
                     <property name="visible">True</property>
                     <property name="can_focus">True</property>
                     <property name="wrap_mode">word</property>
-                    <property name="left_margin">4</property>
-                    <property name="right_margin">4</property>
-                    <property name="top_margin">4</property>
-                    <property name="bottom_margin">4</property>
-                    <property name="indent">2</property>
+                    <property name="left_margin">2</property>
+                    <property name="right_margin">2</property>
+                    <property name="top_margin">2</property>
+                    <property name="bottom_margin">2</property>
                     <property name="input_hints">GTK_INPUT_HINT_SPELLCHECK | GTK_INPUT_HINT_WORD_COMPLETION | GTK_INPUT_HINT_NONE</property>
                     <property name="monospace">True</property>
+                    <property name="show_line_marks">True</property>
+                    <property name="tab_width">4</property>
+                    <property name="auto_indent">True</property>
+                    <property name="insert_spaces_instead_of_tabs">True</property>
+                    <property name="highlight_current_line">True</property>
+                    <property name="background_pattern">grid</property>
                   </object>
                 </child>
               </object>
               <packing>
-                <property name="expand">False</property>
-                <property name="fill">True</property>
-                <property name="position">0</property>
+                <property name="resize">True</property>
+                <property name="shrink">False</property>
               </packing>
             </child>
             <child>
@@ -121,6 +140,7 @@ Author: Nil Gradisnik
                 <property name="visible">True</property>
                 <property name="can_focus">True</property>
                 <property name="shadow_type">in</property>
+                <property name="min_content_width">200</property>
                 <child>
                   <object class="GtkTextView" id="markdown_view">
                     <property name="visible">True</property>
@@ -137,9 +157,8 @@ Author: Nil Gradisnik
                 </child>
               </object>
               <packing>
-                <property name="expand">False</property>
-                <property name="fill">True</property>
-                <property name="position">1</property>
+                <property name="resize">True</property>
+                <property name="shrink">False</property>
               </packing>
             </child>
           </object>
@@ -151,7 +170,7 @@ Author: Nil Gradisnik
         </child>
       </object>
     </child>
-    <child>
+    <child type="titlebar">
       <placeholder/>
     </child>
   </object>
diff --git a/src/main.rs b/src/main.rs
index 92d2019..e397327 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -2,6 +2,7 @@
 
 extern crate gio;
 extern crate gtk;
+extern crate sourceview;
 extern crate comrak;
 
 mod markdown;
@@ -15,6 +16,8 @@ use gio::prelude::*;
 use gtk::prelude::*;
 use gtk::Builder;
 
+use markdown::{string_to_html, buffer_to_html};
+
 // http://gtk-rs.org/tuto/closures
 macro_rules! clone {
     (@param _) => ( _ );
@@ -43,11 +46,12 @@ fn build_ui(application: &gtk::Application) {
 
     let open_button: gtk::ToolButton = builder.get_object("open_button").expect("Couldn't get builder");
     let render_button: gtk::ToolButton = builder.get_object("render_button").expect("Couldn't get builder");
+    let live_button: gtk::ToggleToolButton = builder.get_object("live_button").expect("Couldn't get builder");
 
-    let text_view: gtk::TextView = builder.get_object("text_view").expect("Couldn't get text_view");
+    let text_view: sourceview::View = builder.get_object("text_view").expect("Couldn't get text_view");
     let markdown_view: gtk::TextView = builder.get_object("markdown_view").expect("Couldn't get text_view");
 
-    open_button.connect_clicked(clone!(window, text_view => move |_| {
+    open_button.connect_clicked(clone!(window, text_view, markdown_view => move |_| {
         let file_chooser = gtk::FileChooserDialog::new(Some("Open File"), Some(&window), gtk::FileChooserAction::Open);
         file_chooser.add_buttons(&[
             ("Open", gtk::ResponseType::Ok.into()),
@@ -61,19 +65,24 @@ fn build_ui(application: &gtk::Application) {
             let mut contents = String::new();
             let _ = reader.read_to_string(&mut contents);
 
-            text_view.get_buffer().expect("Couldn't get window").set_text(&contents);
+            text_view.get_buffer().unwrap().set_text(&contents);
+            markdown_view.get_buffer().unwrap().set_text(&string_to_html(contents));
         }
 
         file_chooser.destroy();
     }));
 
-    render_button.connect_clicked(clone!(text_view => move |_| {
-        let buffer = text_view.get_buffer().expect("Error getting text");
-        let (start, end) = buffer.get_bounds();
-        let text = buffer.get_text(&start, &end, false);
+    text_view.connect_key_release_event(clone!(text_view, markdown_view, live_button => move |_, _| {
+        if live_button.get_active() {
+            let buffer = text_view.get_buffer().unwrap();
+            markdown_view.get_buffer().unwrap().set_text(&buffer_to_html(buffer));
+        }
+        Inhibit(true)
+    }));
 
-        let html = markdown::to_html(text);
-        markdown_view.get_buffer().expect("Couldn't get window").set_text(&html);
+    render_button.connect_clicked(clone!(text_view, markdown_view => move |_| {
+        let buffer = text_view.get_buffer().unwrap();
+        markdown_view.get_buffer().unwrap().set_text(&buffer_to_html(buffer));
     }));
 
     window.connect_delete_event(clone!(window => move |_, _| {
@@ -84,7 +93,6 @@ fn build_ui(application: &gtk::Application) {
     window.show_all();
 }
 
-
 fn main() {
     let application = gtk::Application::new("com.github.markdown-rs", gio::ApplicationFlags::empty())
         .expect("Initialization failed...");
diff --git a/src/markdown.rs b/src/markdown.rs
index 87a7bea..2b18874 100644
--- a/src/markdown.rs
+++ b/src/markdown.rs
@@ -1,8 +1,11 @@
 // https://github.com/kivikakk/comrak
 
+use gtk::prelude::*;
+use gtk::TextBuffer;
+
 use comrak::{markdown_to_html, ComrakOptions};
 
-pub fn to_html(text: Option<String>) -> String {
+pub fn string_to_html(text: String) -> String {
     let options = ComrakOptions {
         hardbreaks: true,
         ext_table: true,
@@ -10,5 +13,12 @@ pub fn to_html(text: Option<String>) -> String {
         ..ComrakOptions::default()
     };
 
-    markdown_to_html(&text.unwrap(), &options)
+    markdown_to_html(&text, &options)
+}
+
+pub fn buffer_to_html(buffer: TextBuffer) -> String {
+    let (start, end) = buffer.get_bounds();
+    let text = buffer.get_text(&start, &end, false);
+
+    string_to_html(text.unwrap())
 }
-- 
2.39.2