commit 19b1ccfcbfab7bb1e942c357fb54f2ab36fbed4d
Author: Julian Mutter <julian.mutter@comumail.de>
Date:   Fri Sep 29 16:53:08 2023 +0200

    First commit

diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..3550a30
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use flake
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..6341530
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
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diff --git a/Cargo.lock b/Cargo.lock
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+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "syn"
+version = "2.0.37"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "system-deps"
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+checksum = "30c2de8a4d8f4b823d634affc9cd2a74ec98c53a756f317e529a48046cbf71f3"
+dependencies = [
+ "cfg-expr",
+ "heck",
+ "pkg-config",
+ "toml",
+ "version-compare",
+]
+
+[[package]]
+name = "target-lexicon"
+version = "0.12.11"
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+ "thiserror-impl",
+]
+
+[[package]]
+name = "thiserror-impl"
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "10712f02019e9288794769fba95cd6847df9874d49d871d062172f9dd41bc4cc"
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+ "proc-macro2",
+ "quote",
+ "syn 2.0.37",
+]
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
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+ "serde",
+ "serde_spanned",
+ "toml_datetime",
+ "toml_edit",
+]
+
+[[package]]
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+ "serde",
+]
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+[[package]]
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+ "indexmap",
+ "serde",
+ "serde_spanned",
+ "toml_datetime",
+ "winnow",
+]
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.12"
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+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "579a42fc0b8e0c63b76519a339be31bed574929511fa53c1a3acae26eb258f29"
+
+[[package]]
+name = "version_check"
+version = "0.9.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
+[[package]]
+name = "winnow"
+version = "0.5.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7c2e3184b9c4e92ad5167ca73039d0c42476302ab603e2fec4487511f38ccefc"
+dependencies = [
+ "memchr",
+]
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..76b18e3
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,12 @@
+[package]
+name = "music-reader"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+poppler = "0.3.2"
+cairo-rs = "0.15.12"
+glib-macros = "0.15.11"
+gio = "0.15.12"
+glib = "0.15.12"
+gtk4 = "0.4.8"
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..d1766c2
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,95 @@
+{
+  "nodes": {
+    "naersk": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      },
+      "locked": {
+        "lastModified": 1694081375,
+        "narHash": "sha256-vzJXOUnmkMCm3xw8yfPP5m8kypQ3BhAIRe4RRCWpzy8=",
+        "owner": "nix-community",
+        "repo": "naersk",
+        "rev": "3f976d822b7b37fc6fb8e6f157c2dd05e7e94e89",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "ref": "master",
+        "repo": "naersk",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1695806987,
+        "narHash": "sha256-fX5kGs66NZIxCMcpAGIpxuftajHL8Hil1vjHmjjl118=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "f3dab3509afca932f3f4fd0908957709bb1c1f57",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "type": "indirect"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1695806987,
+        "narHash": "sha256-fX5kGs66NZIxCMcpAGIpxuftajHL8Hil1vjHmjjl118=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "f3dab3509afca932f3f4fd0908957709bb1c1f57",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "naersk": "naersk",
+        "nixpkgs": "nixpkgs_2",
+        "utils": "utils"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
+    "utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1694529238,
+        "narHash": "sha256-zsNZZGTGnMOf9YpHKJqMSsa0dXbfmxeoJ7xHlrt+xmY=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "ff7b65b44d01cf9ba6a71320833626af21126384",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..778cf92
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,43 @@
+{
+  inputs = {
+    naersk.url = "github:nix-community/naersk/master";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, utils, naersk }:
+    utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs { inherit system; };
+        naersk-lib = pkgs.callPackage naersk { };
+        nativeBuildInputs = with pkgs; [
+          gtk4
+          cairo
+          glib
+          pkg-config
+          poppler
+          wrapGAppsHook
+        ];
+      in {
+        defaultPackage = naersk-lib.buildPackage {
+          src = ./.;
+          inherit nativeBuildInputs;
+        };
+
+        devShell = with pkgs;
+          mkShell {
+            inherit nativeBuildInputs;
+            buildInputs = [
+              cargo
+              rustc
+              rustfmt
+              rust-analyzer
+              pre-commit
+              rustPackages.clippy
+              cargo-outdated
+              cargo-audit
+            ];
+            RUST_SRC_PATH = rustPlatform.rustLibSrc;
+          };
+      });
+}
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..928c8d9
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,177 @@
+use cairo::Context;
+use gio::ApplicationFlags;
+use glib::clone;
+use gtk4::prelude::*;
+use gtk4::{Application, ApplicationWindow, DrawingArea, Label};
+use poppler::PopplerDocument;
+use std::cell::RefCell;
+use std::env;
+use std::ffi::OsString;
+use std::rc::Rc;
+
+const APP_ID: &str = "de.frajul.music-reader";
+
+fn main() {
+    let app = Application::builder()
+        .application_id(APP_ID)
+        .flags(ApplicationFlags::HANDLES_OPEN | ApplicationFlags::HANDLES_COMMAND_LINE)
+        .build();
+
+    app.connect_command_line(move |app, cmdline| {
+        build_ui(&app, cmdline.arguments());
+        0
+    });
+    app.run_with_args(&env::args().collect::<Vec<_>>());
+    app.run();
+}
+
+fn build_ui(app: &Application, arguments: Vec<OsString>) {
+    let filename = arguments
+        .get(1)
+        .and_then(|arg| arg.clone().into_string().ok());
+
+    let open_file_button = gtk4::Button::from_icon_name("document-open");
+
+    let app_wrapper = gtk4::Box::builder()
+        .orientation(gtk4::Orientation::Vertical)
+        .build();
+
+    let bottom_bar = gtk4::Box::builder().hexpand_set(true).build();
+    let header_bar = gtk4::HeaderBar::builder().build();
+
+    header_bar.pack_start(&open_file_button);
+    app_wrapper.append(&bottom_bar);
+
+    let window = ApplicationWindow::builder()
+        .application(app)
+        .title("Music Reader")
+        .child(&app_wrapper)
+        .build();
+    window.set_titlebar(Some(&header_bar));
+
+    let toggle_fullscreen = clone!(@weak header_bar, @weak bottom_bar => move || {
+        if header_bar.is_visible() {
+            header_bar.hide();
+            bottom_bar.hide();
+        } else {
+            header_bar.show();
+            bottom_bar.show();
+        }
+    });
+
+    let load_doc = move |filename: String| {
+        let drawing_area = DrawingArea::builder()
+            .width_request(100)
+            .height_request(100)
+            .hexpand(true)
+            .vexpand(true)
+            .build();
+        let first_child = app_wrapper.first_child().unwrap();
+        let last_child = app_wrapper.last_child().unwrap();
+        if &first_child != &last_child {
+            app_wrapper.remove(&first_child);
+        }
+
+        app_wrapper.prepend(&drawing_area);
+
+        let page_indicator = Label::builder().label("Counting").build();
+        let old_indicator = bottom_bar.last_child();
+        if old_indicator.is_some() {
+            bottom_bar.remove(&old_indicator.unwrap());
+        }
+        bottom_bar.append(&page_indicator);
+
+        let doc = PopplerDocument::new_from_file(filename, "").unwrap();
+
+        let num_pages = doc.get_n_pages();
+        let num_pages_ref = Rc::new(RefCell::new(num_pages));
+
+        let current_page = Rc::new(RefCell::new(1));
+        let current_page_copy_another = current_page.clone();
+        let current_page_view = current_page.clone();
+
+        let surface = cairo::ImageSurface::create(cairo::Format::Rgb24, 0, 0).unwrap();
+        let ctx = Context::new(&surface).unwrap();
+
+        let update_page_status = clone!(@strong num_pages_ref, @weak page_indicator, @strong drawing_area => move || {
+            let page_status: String = format!("{} of {}", *current_page_copy_another.borrow_mut(), num_pages);
+            let page_status_s: &str = &page_status[..];
+            page_indicator.set_label(page_status_s);
+            drawing_area.queue_draw();
+
+        });
+
+        update_page_status();
+
+        let click = gtk4::GestureClick::new();
+        click.set_button(0);
+        click.connect_pressed(
+                 glib::clone!(@weak drawing_area, @strong toggle_fullscreen, @strong num_pages, @strong update_page_status => move |_count, _, x, y| {
+                     let center = drawing_area.width() / 2;
+                     if y < (drawing_area.height() / 5) as f64 {
+                     toggle_fullscreen();
+                     } else if x > center as f64 &&  *current_page.borrow_mut() < num_pages {
+                        *current_page.borrow_mut() += 1;
+                     } else if x < center as f64 && *current_page.borrow_mut() > 1 {
+                        *current_page.borrow_mut()  -= 1;
+                     }
+                     update_page_status();
+
+                 }),
+             );
+
+        drawing_area.add_controller(&click);
+
+        drawing_area.set_draw_func(move |area, context, _a, _b| {
+            let current_page_number = &current_page_view.borrow_mut();
+            context.set_source_rgba(1.0, 1.0, 1.0, 1.0);
+            context.paint().unwrap();
+            context.fill().expect("uh oh");
+            context.paint().unwrap();
+
+            let page = doc.get_page(**current_page_number - 1).unwrap();
+            let (w, h) = page.get_size();
+            let width_diff = area.width() as f64 / w;
+            let height_diff = area.height() as f64 / h;
+            context.save().unwrap();
+            if width_diff > height_diff {
+                context.scale(height_diff, height_diff);
+            } else {
+                context.scale(width_diff, width_diff);
+            }
+            page.render(&context);
+
+            let r = ctx.paint();
+            match r {
+                Err(v) => println!("Error painting PDF: {v:?}"),
+                Ok(_v) => println!(""),
+            }
+
+            ctx.show_page().unwrap();
+        });
+    };
+
+    if filename.is_some() {
+        load_doc(filename.unwrap());
+    }
+
+    open_file_button.connect_clicked(clone!(@weak window, @strong load_doc => move |_button| {
+        let filechooser = gtk4::FileChooserDialog::builder()
+            .title("Choose a PDF...")
+            .action(gtk4::FileChooserAction::Open)
+            .modal(true)
+            .build();
+        filechooser.add_button("_Cancel", gtk4::ResponseType::Cancel);
+        filechooser.add_button("_Open", gtk4::ResponseType::Accept);
+        filechooser.set_transient_for(Some(&window));
+        filechooser.connect_response(clone!(@strong load_doc => move |d, response| {
+            if response == gtk4::ResponseType::Accept {
+                let path = d.file().unwrap().path().unwrap().into_os_string().into_string().unwrap();
+                load_doc(path);
+            }
+            d.destroy();
+        }));
+        filechooser.show()
+    }));
+    window.present();
+}