<h1 align="center"><img alt="Glint" src="./logo.png"></h1>
<p align="center">A specialized, statically typed markup, styling, and state management language created exclusively for <strong>Eclipse DE</strong></p>

## About Glint

Unlike traditional configuration files (JSON, TOML, YAML) or heavyweight embedded languages (Lua, JS), Glint is designed as the live source code of the graphical shell itself. It parses in nanoseconds, compiles to compact bytecode on the fly, and allows for rebuilding the DE interface in real time without a system restart.

## Philosophy "Source-as-Configuration"

Eclipse doesn't have a concept of "default settings" in the form of hidden binary code. Everything you see on the screen, from the tray corner radius to the desktop layout logic, is written in Glint files. (`.gltm`, `.glts` and bytecode - `.glbc`)

- **Hot-Reload**: Any change in the `.gltm`/`.glts` file is instantly picked up, compiled into '.glbc' and rendered at runtime.
- **Crash resistance**: If the user makes a syntax or logic error, Glint will automatically roll back to the last working state from the bytecode cache. The system fundamentally cannot crash due to an incorrect configuration. Eclipse itself is a framework for writing Glint code to create a DE, although it has its own base source code, allowing you to enjoy the DE and use your PC like GNOME or KDE Plasma.
- **Who is Glint for?**: Knowing Glint is necessary for advanced users who want full control over their DE, however, no one forbids the use of the unmodified Eclipse DE

## Architecture

The language is designed with a focus on maximum predictability, determinism, and performance of the native application layer on 'iced' (Rust).

### Sigil system

| Symbol         | Type      | Description                                                |
| -------------- | --------- | ---------------------------------------------------------- |
| `@`            | Directive | Single symbol → instant dispatch                           |
| `$`            | Varialbe  | Distinguishes from item names and strings                  |
| `!rhei`        | call Rhei | '!' does not occur in names; The body is transmitted as-is |
| `//`           | Comment   | Two-character check                                        |
| `"…"`          | String    | An unambiguous beginning and end; escape via '\'           |
| `#RRGGBB`      | Color     | Only in the value position; parsed for 7 bytes             |
| `fs:/…`        | FS-path   | URI scheme; Recognized in 3 characters (f,s,:)             |
| Capital letter | Element   | Distinguishes from directives and keywords                 |
| `0-9 / -`      | Integer   | The first character uniquely indicates the numeric type    |

The parser spends **zero time** determining the type of token. It doesn't need to symbolically compare strings like `if`, `let`, or `function`.

### 2. Separation of scopes '()' and '{}'

- Parentheses '(...)' contain **only** the properties of the element in the format 'key=value'.
- Curly braces '{...}' contain **only** child elements and directives.

### 3. Native protocols

Instead of calling heavy functions like 'readFile("/path")' that require argument parsing in runtime, Glint uses built-in prefixes:

```gltm
Image(src=fs:/usr/share/backgrounds/wallpaper.png)
```

## Bytecode

Glint does not interpret pure text while DE is running. It compiles it into a compact binary bytecode. Each UI element is translated into `ELEM_PUSH`/`ELEM_POP` instructions. Each property is converted into a typed opcode of a fixed width (`PROP_INT`, `PROP_STR`, `PROP_COLOR`).

This allows the Render Hot-Path to run without memory allocations at all

## Syntax example

```gltm
@version 1
@style "desktop.glts"

@global $username   = !rhei: os.env("USER")
@global $hostname   = !rhei: os.hostname()
@global $locale     = "ru_RU"
@global $scaleFactor = 1.0

@singleton Config {
    wallpaper      = fs:/home/$username/.config/de/wallpaper.jpg
    wallpaperFit   = "cover"
    iconTheme      = "papirus-dark"
    fontMain       = "Inter"
    fontMono       = "JetBrains Mono"
    fontSize       = 13
    workspaces     = 4
    animEnabled    = true
    accentColor    = #cba6f7
    taskbarPos     = "bottom"
}

@singleton SystemState {
    battery    = !rhei: sys.battery()
    volume     = !rhei: sys.volume.get()
    brightness = !rhei: sys.brightness.get()
    network    = !rhei: sys.network.status()
    timezone   = !rhei: os.timezone()
}

@component DesktopIcon(label: str, icon: fspath, exec: str) {
    Button(class="desktop-icon") {
        @on click {
            !rhei: process.spawn($exec)
        }
        @on dblclick {
            !rhei {
                process.spawn($exec)
                wm.raise(process.lastPid())
            }
        }
        Image(src=$icon, class="icon-img") {}
        Label(class="icon-label") $label
    }
}

@component BatteryWidget {
    @if $SystemState.battery.present {
        @let $lvl = $SystemState.battery.level
        @let $ico = !rhei: icons.battery($lvl)

        Panel(class="tray-item") {
            Icon(src=$ico, class="tray-icon") {}
            @if $SystemState.battery.charging {
                Icon(src=fs:/usr/share/eclipse/icons/charging.svg,
                     class="tray-icon tray-icon--accent") {}
            }
        }
    }
}

@component ClockWidget {
    @let $time = !rhei: sys.time.format("%H:%M", $SystemState.timezone)
    @let $date = !rhei: sys.time.format("%d %b", $SystemState.timezone)

    Panel(class="clock-widget") {
        @on click {
            !rhei: ui.toggle("calendar-popup")
        }
        Label(class="clock-time") $time
        Label(class="clock-date") $date
    }
}

@component SystemTray {
    Panel(id="system-tray", class="tray") {
        BatteryWidget {}

        @if $SystemState.network.connected {
            Icon(class="tray-icon",
                 src=!rhei: icons.network($SystemState.network.type)) {}
        } @else {
            Icon(class="tray-icon tray-icon--warn",
                 src=fs:/usr/share/eclipse/icons/net-offline.svg) {}
        }

        Slider(id="vol-slider", class="tray-slider",
               value=$SystemState.volume, min=0, max=100) {
            @on change {
                !rhei: sys.volume.set($self.value)
            }
        }

        ClockWidget {}
    }
}

Screen(id="root", width=1920, height=1080, scale=$scaleFactor) {

    Wallpaper(id="bg",
              src=$Config.wallpaper,
              fallback=fs:/usr/share/eclipse/wallpapers/default.jpg,
              fit=$Config.wallpaperFit,
              watch=true) {}

    Panel(id="desktop", class="desktop") {
        @let $desktopFiles = !rhei: fs.glob("/home/$username/Desktop/*.desktop")

        @each $f in $desktopFiles {
            @let $entry = !rhei: xdg.parseDesktop($f)
            DesktopIcon(
                label=$entry.name,
                icon=!rhei: icons.resolve($entry.icon, $Config.iconTheme),
                exec=$entry.exec
            ) {}
        }

        @on contextmenu {
            !rhei: ui.show("desktop-ctx")
        }
    }

    ContextMenu(id="desktop-ctx", class="ctx-menu", visible=false) {
        MenuItem(class="ctx-item") {
            @on click { !rhei: ui.show("settings") }
            "Settings"
        }
        MenuItem(class="ctx-item") {
            @on click { !rhei: wallpaper.showPicker() }
            "Change wallpaper"
        }
        MenuDivider {}
        MenuItem(class="ctx-item ctx-item--danger") {
            @on click { !rhei: session.logout() }
            "Logout"
        }
    }

    Panel(id="taskbar", class="taskbar") {

        Button(id="launcher-btn", class="launcher-button") {
            @on click { !rhei: ui.toggle("app-launcher") }
            Image(src=fs:/usr/share/eclipse/logo.svg) {}
        }

        Panel(id="window-list", class="window-list") {
            @let $wins = !rhei: wm.getWindows()

            @each $w in $wins {
                Button(class="taskbar-win", data-wid=$w.id,
                       active=$w.focused) {
                    @on click     { !rhei: wm.focus($w.id) }
                    @on middleclick { !rhei: wm.close($w.id) }
                    Icon(src=$w.icon, class="win-icon") {}
                    Label(class="win-title") $w.title
                }
            }
        }

        SystemTray {}
    }

    Overlay(id="app-launcher", class="launcher", visible=false) {
        @on keydown(key="Escape") {
            !rhei: ui.hide("app-launcher")
        }

        Input(id="launcher-search", class="launcher-search",
              placeholder="Search...",
              autofocus=true) {
            @on input {
                !rhei: launcher.filter($self.value)
            }
        }

        Grid(id="app-grid", class="launcher-grid", columns=6) {
            @let $apps = !rhei: apps.listAll()

            @each $app in $apps {
                Button(class="launcher-app") {
                    @on click {
                        !rhei {
                            process.spawn($app.exec)
                            ui.hide("app-launcher")
                        }
                    }
                    Image(src=$app.icon, class="app-icon") {}
                    Label(class="app-name") $app.name
                }
            }
        }
    }

    Overlay(id="notif-layer", class="notif-layer") {
        @let $notifs = !rhei: notifications.active()

        @each $n in $notifs {
            Panel(class="notif-card", data-id=$n.id) {
                Panel(class="notif-header") {
                    Icon(src=$n.appIcon, class="notif-icon") {}
                    Label(class="notif-app") $n.appName
                    Button(class="notif-close") {
                        @on click { !rhei: notifications.dismiss($n.id) }
                        "×"
                    }
                }
                Label(class="notif-title") $n.summary
                @if $n.body {
                    Label(class="notif-body") $n.body
                }
            }
        }
    }

    @if !rhei: os.env("GLINT_DEV") {
        !rhei {
            debug.overlay.show()
            debug.log("DE is init. User: " + $username)
            debug.log("Singletones: Config, SystemState")
        }
    }
}
```

```glts
$bg          = #1e1e2e
$bg-s0       = #313244
$bg-s1       = #45475a
$text        = #cdd6f4
$text-dim    = #a6adc8
$accent      = #cba6f7
$accent-h    = #b4befe
$red         = #f38ba8
$warn        = #fab387
$green       = #a6e3a1
$r           = 8px
$r-sm        = 4px
$taskbar-h   = 36px
$t-fast      = 120ms
$t-mid       = 240ms

@mixin flex-row {
    display: flex
    flex-direction: row
    align-items: center
}

@mixin flex-col {
    display: flex
    flex-direction: column
    align-items: flex-start
}

@mixin glass {
    background: rgba(30, 30, 46, 0.88)
    backdrop-filter: blur(14px)
    border: 1px solid rgba(203, 166, 247, 0.15)
}

@mixin shadow-sm {
    box-shadow: 0 2px 8px rgba(0,0,0,0.45)
}

@mixin shadow-lg {
    box-shadow: 0 6px 24px rgba(0,0,0,0.65)
}

@mixin btn-reset {
    border: none
    background: transparent
    cursor: pointer
    padding: 0
}

@anim fade-in {
    from { opacity: 0; transform: scale(0.95) }
    to   { opacity: 1; transform: scale(1.0)  }
}

@anim slide-up {
    from { opacity: 0; transform: translateY(10px) }
    to   { opacity: 1; transform: translateY(0)    }
}

@anim slide-down {
    from { opacity: 0; transform: translateY(-10px) }
    to   { opacity: 1; transform: translateY(0)     }
}

@anim pulse-warn {
    0%   { opacity: 1.0 }
    50%  { opacity: 0.4 }
    100% { opacity: 1.0 }
}

Screen {
    font-family: $Config.fontMain
    font-size:   $Config.fontSizepx
    color:       $text
    background:  transparent
}

Wallpaper {
    position: absolute
    inset:    0
    z-index:  0
    object-fit: cover
}

Panel.desktop {
    position: absolute
    inset:    0 0 $taskbar-h 0
    z-index:  1
    padding:  16px
    display:  grid
    grid-template-columns: repeat(auto-fill, 80px)
    grid-template-rows:    repeat(auto-fill, 88px)
    align-content: start
    gap: 8px
}

Button.desktop-icon {
    @use flex-col
    @use btn-reset

    width:         76px
    padding:       6px 4px
    border-radius: $r-sm
    border:        1px solid transparent
    align-items:   center
    gap:           5px
    transition:    background $t-fast, border-color $t-fast
}

Button.desktop-icon:hover {
    background:   rgba(203,166,247,0.12)
    border-color: rgba(203,166,247,0.30)
}

Button.desktop-icon:active {
    background: rgba(203,166,247,0.22)
    transform:  scale(0.96)
}

Button.desktop-icon > Image.icon-img {
    width:  48px
    height: 48px
}

Button.desktop-icon > Label.icon-label {
    font-size:   11px
    color:       $text
    text-align:  center
    text-shadow: 0 1px 4px rgba(0,0,0,0.85)
    max-width:   72px
    overflow:    ellipsis
}

Panel.taskbar {
    @use flex-row
    @use glass
    @use shadow-sm

    position: absolute
    bottom:   0; left: 0
    width:    100%
    height:   $taskbar-h
    z-index:  100
    padding:  0 8px
    gap:      4px
}

Button.launcher-button {
    @use flex-row
    @use btn-reset

    width:         30px
    height:        28px
    border-radius: $r-sm
    padding:       5px
    transition:    background $t-fast
}

Button.launcher-button:hover  { background: rgba(203,166,247,0.20) }
Button.launcher-button:active { background: rgba(203,166,247,0.36) }

Panel.window-list {
    @use flex-row
    flex:     1
    gap:      2px
    height:   28px
    overflow: hidden
}

Button.taskbar-win {
    @use flex-row
    @use btn-reset

    max-width:     180px
    height:        28px
    padding:       0 8px
    border-radius: $r-sm
    background:    rgba(255,255,255,0.06)
    color:         $text-dim
    font-size:     12px
    gap:           6px
    overflow:      hidden
    transition:    background $t-fast, color $t-fast
}

Button.taskbar-win:hover {
    background: rgba(255,255,255,0.12)
    color:      $text
}

Button.taskbar-win[active=true] {
    background:    rgba(203,166,247,0.18)
    color:         $accent
    border-bottom: 2px solid $accent
}

Button.taskbar-win > Icon.win-icon {
    width:       16px
    height:      16px
    flex-shrink: 0
}

Button.taskbar-win > Label.win-title {
    white-space: nowrap
    overflow:    ellipsis
}

Panel.tray {
    @use flex-row
    margin-left: auto
    gap:         4px
}

Panel.tray-item      { @use flex-row; gap: 2px }

Icon.tray-icon {
    width:      16px
    height:     16px
    opacity:    0.82
    cursor:     pointer
    transition: opacity $t-fast
}

Icon.tray-icon:hover     { opacity: 1.0 }
Icon.tray-icon--accent   { color: $green }
Icon.tray-icon--warn {
    color:     $warn
    animation: pulse-warn 2s ease infinite
}

Slider.tray-slider {
    width:        68px
    height:       4px
    accent-color: $accent
}

Panel.clock-widget {
    @use flex-col
    padding:    0 8px
    cursor:     pointer
    gap:        0
    border-radius: $r-sm
    transition:    background $t-fast
}

Panel.clock-widget:hover { background: rgba(255,255,255,0.07) }

Label.clock-time {
    font-family:  $Config.fontMono
    font-size:    13px
    font-weight:  500
    color:        $text
    letter-spacing: 0.4px
}

Label.clock-date {
    font-size: 10px
    color:     $text-dim
}

ContextMenu.ctx-menu {
    @use glass
    @use shadow-lg

    border-radius: $r
    padding:       4px
    min-width:     200px
    animation:     fade-in $t-fast ease
}

MenuItem.ctx-item {
    padding:       7px 12px
    border-radius: $r-sm
    font-size:     13px
    color:         $text
    cursor:        pointer
    transition:    background $t-fast
}

MenuItem.ctx-item:hover          { background: rgba(255,255,255,0.08) }
MenuItem.ctx-item--danger        { color: $red }
MenuItem.ctx-item--danger:hover  { background: rgba(243,139,168,0.12) }
MenuDivider {
    height:     1px
    background: rgba(255,255,255,0.08)
    margin:     4px 0
}

Overlay.launcher {
    @use glass
    @use flex-col
    @use shadow-lg

    position:      absolute
    bottom:        $taskbar-h
    left:          50%
    transform:     translateX(-50%)
    width:         700px
    max-height:    540px
    border-radius: $r
    padding:       16px
    z-index:       200
    gap:           12px
    animation:     slide-up $t-mid ease
}

Input.launcher-search {
    width:         100%
    height:        40px
    background:    rgba(255,255,255,0.06)
    border:        1px solid rgba(203,166,247,0.25)
    border-radius: $r-sm
    padding:       0 14px
    font-size:     14px
    color:         $text
    outline:       none
    transition:    border-color $t-fast, background $t-fast
}

Input.launcher-search:focused {
    border-color: $accent
    background:   rgba(255,255,255,0.09)
}

Grid.launcher-grid {
    width:                  100%
    grid-template-columns:  repeat(6, 1fr)
    gap:                    8px
    overflow-y:             scroll
    max-height:             420px
    padding:                4px
}

Button.launcher-app {
    @use flex-col
    @use btn-reset

    padding:       10px 6px
    border-radius: $r-sm
    border:        1px solid transparent
    align-items:   center
    gap:           6px
    transition:    background $t-fast, border-color $t-fast
    animation:     fade-in $t-mid ease
}

Button.launcher-app:hover {
    background:   rgba(203,166,247,0.12)
    border-color: rgba(203,166,247,0.25)
}

Button.launcher-app > Image.app-icon {
    width: 44px; height: 44px
}

Button.launcher-app > Label.app-name {
    font-size:  11px
    color:      $text-dim
    text-align: center
    max-width:  80px
    overflow:   ellipsis
}

Overlay.notif-layer {
    @use flex-col
    position: absolute
    top:      12px; right: 12px
    gap:      8px
    z-index:  300
    max-width: 360px
}

Panel.notif-card {
    @use glass
    @use flex-col
    @use shadow-sm

    border-radius: $r
    padding:       12px
    gap:           4px
    animation:     slide-down $t-mid ease
}

Panel.notif-header {
    @use flex-row
    gap:           6px
    margin-bottom: 4px
}

Icon.notif-icon     { width: 16px; height: 16px }
Label.notif-app     { font-size: 11px; color: $text-dim }
Label.notif-title   { font-size: 13px; font-weight: 500; color: $text }
Label.notif-body    { font-size: 12px; color: $text-dim; line-height: 1.5 }

Button.notif-close {
    @use btn-reset
    margin-left:   auto
    color:         $text-dim
    font-size:     16px
    line-height:   1
    transition:    color $t-fast
}

Button.notif-close:hover { color: $red }

@if $Config.accentColor != #cba6f7 {
    Button.desktop-icon:hover {
        background:   rgba($Config.accentColor, 0.12)
        border-color: rgba($Config.accentColor, 0.30)
    }
    Button.taskbar-win[active=true] {
        background:    rgba($Config.accentColor, 0.18)
        color:         $Config.accentColor
        border-bottom: 2px solid $Config.accentColor
    }
    Input.launcher-search:focused { border-color: $Config.accentColor }
}

```