From 7877772115bd34704b69a3b70c10351709c887a2 Mon Sep 17 00:00:00 2001
From: Nil Gradisnik <nil@layer.com>
Date: Fri, 1 Dec 2017 17:20:56 -0800
Subject: [PATCH] Working Markdown to HTML renderer

---
 .gitignore       |   5 +
 Cargo.lock       | 746 +++++++++++++++++++++++++++++++++++++++++++++++
 Cargo.toml       |  16 +
 README.md        |  27 ++
 src/gtk-ui.glade | 158 ++++++++++
 src/main.rs      |  99 +++++++
 src/markdown.rs  |  14 +
 7 files changed, 1065 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Cargo.lock
 create mode 100644 Cargo.toml
 create mode 100644 README.md
 create mode 100644 src/gtk-ui.glade
 create mode 100644 src/main.rs
 create mode 100644 src/markdown.rs

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..8630656
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,5 @@
+
+/target/
+**/*.rs.bk
+
+*.glade~
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..809148c
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,746 @@
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..59b5b35
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,16 @@
+[package]
+name = "markdown-rs"
+version = "0.1.0"
+authors = ["Nil Gradisnik <nil@layer.com>"]
+
+[dependencies]
+gio = "0.3"
+comrak = "0.2"
+
+[dependencies.gtk]
+version = "0.3"
+default-features = false
+features = ["v3_22"]
+
+[dev-dependencies]
+clippy = "0.0.174"
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..8b085e0
--- /dev/null
+++ b/README.md
@@ -0,0 +1,27 @@
+# Markdown Rust
+A distraction free Markdown editor.
+
+## Motivation
+There seem to be no simple, fast Markdown editors on Linux. Most of them are built with some version of Chrome and Javascript.
+
+This project is inspired by [uberwriter](http://uberwriter.wolfvollprecht.de/).
+
+## Tools required
+ - GTK UI: http://gtk-rs.org/
+ - GtkSourceView multiline text editing: https://github.com/gtk-rs/sourceview
+ - Markdown parser/renderer: https://github.com/kivikakk/comrak
+ - WebKitGtk HTML preview: https://github.com/gtk-rs/webkit2gtk-rs
+
+## Development
+
+Build:
+
+    cargo build
+
+Run:
+
+    ./target/debug/markdown-rs
+
+Test:
+
+    cargo test -- --test-threads=1
diff --git a/src/gtk-ui.glade b/src/gtk-ui.glade
new file mode 100644
index 0000000..34c6a10
--- /dev/null
+++ b/src/gtk-ui.glade
@@ -0,0 +1,158 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- Generated with glade 3.20.1 
+
+The MIT License (MIT)
+
+Copyright (c) 
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+
+Author: Nil Gradisnik
+
+-->
+<interface>
+  <requires lib="gtk+" version="3.20"/>
+  <!-- interface-license-type mit -->
+  <!-- interface-name markdown-rs -->
+  <!-- interface-description Simple Markdown editor -->
+  <!-- interface-authors Nil Gradisnik -->
+  <object class="GtkApplicationWindow" id="window">
+    <property name="can_focus">False</property>
+    <property name="title" translatable="yes">Markdown Rust</property>
+    <property name="window_position">center</property>
+    <property name="default_width">800</property>
+    <property name="default_height">480</property>
+    <property name="has_resize_grip">True</property>
+    <child>
+      <object class="GtkBox" id="v_box">
+        <property name="visible">True</property>
+        <property name="can_focus">False</property>
+        <property name="orientation">vertical</property>
+        <child>
+          <object class="GtkToolbar" id="toolbar">
+            <property name="visible">True</property>
+            <property name="can_focus">False</property>
+            <child>
+              <object class="GtkToolButton" id="open_button">
+                <property name="visible">True</property>
+                <property name="can_focus">False</property>
+                <property name="tooltip_text" translatable="yes">Open</property>
+                <property name="is_important">True</property>
+                <property name="label" translatable="yes">Open</property>
+                <property name="use_underline">True</property>
+                <property name="icon_name">document-open</property>
+              </object>
+              <packing>
+                <property name="expand">False</property>
+                <property name="homogeneous">True</property>
+              </packing>
+            </child>
+            <child>
+              <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="is_important">True</property>
+                <property name="label" translatable="yes">Render</property>
+                <property name="use_underline">True</property>
+                <property name="icon_name">media-playback-start</property>
+              </object>
+              <packing>
+                <property name="expand">False</property>
+                <property name="homogeneous">True</property>
+              </packing>
+            </child>
+          </object>
+          <packing>
+            <property name="expand">False</property>
+            <property name="fill">True</property>
+            <property name="position">0</property>
+          </packing>
+        </child>
+        <child>
+          <object class="GtkBox">
+            <property name="visible">True</property>
+            <property name="can_focus">False</property>
+            <property name="homogeneous">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>
+                <child>
+                  <object class="GtkTextView" 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="input_hints">GTK_INPUT_HINT_SPELLCHECK | GTK_INPUT_HINT_WORD_COMPLETION | GTK_INPUT_HINT_NONE</property>
+                    <property name="monospace">True</property>
+                  </object>
+                </child>
+              </object>
+              <packing>
+                <property name="expand">False</property>
+                <property name="fill">True</property>
+                <property name="position">0</property>
+              </packing>
+            </child>
+            <child>
+              <object class="GtkScrolledWindow" id="scrolled_window_right">
+                <property name="visible">True</property>
+                <property name="can_focus">True</property>
+                <property name="shadow_type">in</property>
+                <child>
+                  <object class="GtkTextView" id="markdown_view">
+                    <property name="visible">True</property>
+                    <property name="can_focus">True</property>
+                    <property name="editable">False</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="monospace">True</property>
+                  </object>
+                </child>
+              </object>
+              <packing>
+                <property name="expand">False</property>
+                <property name="fill">True</property>
+                <property name="position">1</property>
+              </packing>
+            </child>
+          </object>
+          <packing>
+            <property name="expand">True</property>
+            <property name="fill">True</property>
+            <property name="position">1</property>
+          </packing>
+        </child>
+      </object>
+    </child>
+    <child>
+      <placeholder/>
+    </child>
+  </object>
+</interface>
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..92d2019
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,99 @@
+// http://gtk-rs.org
+
+extern crate gio;
+extern crate gtk;
+extern crate comrak;
+
+mod markdown;
+
+use std::env::args;
+use std::fs::File;
+use std::io::prelude::*;
+use std::io::BufReader;
+
+use gio::prelude::*;
+use gtk::prelude::*;
+use gtk::Builder;
+
+// http://gtk-rs.org/tuto/closures
+macro_rules! clone {
+    (@param _) => ( _ );
+    (@param $x:ident) => ( $x );
+    ($($n:ident),+ => move || $body:expr) => (
+        {
+            $( let $n = $n.clone(); )+
+            move || $body
+        }
+    );
+    ($($n:ident),+ => move |$($p:tt),+| $body:expr) => (
+        {
+            $( let $n = $n.clone(); )+
+            move |$(clone!(@param $p),)+| $body
+        }
+    );
+}
+
+fn build_ui(application: &gtk::Application) {
+    let glade_src = include_str!("gtk-ui.glade");
+    let builder = Builder::new();
+    builder.add_from_string(glade_src).expect("Couldn't add from string");
+
+    let window: gtk::ApplicationWindow = builder.get_object("window").expect("Couldn't get window");
+    window.set_application(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 text_view: gtk::TextView = 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 |_| {
+        let file_chooser = gtk::FileChooserDialog::new(Some("Open File"), Some(&window), gtk::FileChooserAction::Open);
+        file_chooser.add_buttons(&[
+            ("Open", gtk::ResponseType::Ok.into()),
+            ("Cancel", gtk::ResponseType::Cancel.into()),
+        ]);
+        if file_chooser.run() == gtk::ResponseType::Ok.into() {
+            let filename = file_chooser.get_filename().expect("Couldn't get filename");
+            let file = File::open(&filename).expect("Couldn't open file");
+
+            let mut reader = BufReader::new(file);
+            let mut contents = String::new();
+            let _ = reader.read_to_string(&mut contents);
+
+            text_view.get_buffer().expect("Couldn't get window").set_text(&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);
+
+        let html = markdown::to_html(text);
+        markdown_view.get_buffer().expect("Couldn't get window").set_text(&html);
+    }));
+
+    window.connect_delete_event(clone!(window => move |_, _| {
+        window.destroy();
+        Inhibit(false)
+    }));
+
+    window.show_all();
+}
+
+
+fn main() {
+    let application = gtk::Application::new("com.github.markdown-rs", gio::ApplicationFlags::empty())
+        .expect("Initialization failed...");
+
+    application.connect_startup(move |app| {
+        build_ui(app);
+    });
+
+    application.connect_activate(|_| {});
+
+    application.run(&args().collect::<Vec<_>>());
+}
diff --git a/src/markdown.rs b/src/markdown.rs
new file mode 100644
index 0000000..87a7bea
--- /dev/null
+++ b/src/markdown.rs
@@ -0,0 +1,14 @@
+// https://github.com/kivikakk/comrak
+
+use comrak::{markdown_to_html, ComrakOptions};
+
+pub fn to_html(text: Option<String>) -> String {
+    let options = ComrakOptions {
+        hardbreaks: true,
+        ext_table: true,
+        ext_strikethrough: true,
+        ..ComrakOptions::default()
+    };
+
+    markdown_to_html(&text.unwrap(), &options)
+}
-- 
2.39.2