buffr-ui

Browser chrome for buffr — statusline, tab strip, input bar, permission and confirm prompts.

Pure pixel-blit rendering into a &mut [u32] slice (BGRA, row-major). No winit or softbuffer types in the public API — callers (apps/buffr) own the surface lifecycle and pass a raw pixel buffer each frame. The chrome lives in a strip docked to the bottom of the buffr window, below the CEF child window. GPU upload is done by the wgpu layer in apps/buffr/src/render.rs.

Status

0.0.1 — Statusline (mode block, URL cell, cert pip, progress bar, zoom, find count, hint state, update indicator, private marker, high-contrast mode); TabStrip (tab labels, active/pinned indicators); InputBar (omnibar + command-line input with suggestions); PermissionsPrompt and ConfirmPrompt.

Components

Component	Height constant	Purpose
`Statusline`	`STATUSLINE_HEIGHT = 30`	Mode indicator + URL + cert pip + right-hand cells.
`TabStrip`	`TAB_STRIP_HEIGHT`	Tab labels; active and pinned markers.
`InputBar`	`INPUT_HEIGHT`	Omnibar / command-line input; up to `MAX_SUGGESTIONS` rows.
`PermissionsPrompt`	`PERMISSIONS_PROMPT_HEIGHT`	Inline permission decision prompt.
`ConfirmPrompt`	`CONFIRM_PROMPT_HEIGHT`	Generic yes/no confirm prompt (e.g., close-all-tabs).
`DownloadNoticeStrip`	`DOWNLOAD_NOTICE_HEIGHT`	Ephemeral download started / finished notification strip.

Usage

# Cargo.toml (workspace path dep)
buffr-ui = { path = "crates/buffr-ui" }

// pseudo-code — see apps/buffr/src/main.rs for the actual wiring

use buffr_ui::{Statusline, STATUSLINE_HEIGHT};

let s = Statusline {
    mode: buffr_modal::PageMode::Normal,
    url: "https://example.com".into(),
    progress: 1.0,
    ..Statusline::default()
};

// `buffer` is the full window's BGRA pixel slice (one u32 per pixel, row-major).
// `width` / `height` are the full window dimensions in pixels.
s.paint(&mut buffer, width, height);
// The statusline occupies only the bottom `STATUSLINE_HEIGHT` rows;
// the CEF child window above is untouched.

Colour model

Pixels are u32 with layout 0xFF_RR_GG_BB (little-endian byte order [B, G, R, A]), matching wgpu::TextureFormat::Bgra8Unorm. Alpha is always 0xFF (fully opaque) so GPU alpha-blending composites chrome strips over the OSR texture correctly.

Mode-specific accent colours:

Mode	Accent (`0x00_RR_GG_BB`)
Normal	`4A_C9_5C` (green)
Visual	`E0_8B_2A` (amber)
Command	`55_88_FF` (blue)
Hint	`C8_5A_E0` (violet)
Insert	`5A_AA_E0` (cyan)

High-contrast palette (theme.high_contrast = true): HC_BG = 0xFF_00_00_00 (black), HC_FG = 0xFF_FF_FF_FF (white), HC_ACCENT = 0xFF_FF_FF_00 (yellow).

Font

buffr_ui::font — bitmap glyph rasteriser; ASCII printable range. text_width(s) returns pixel width; draw_text(buffer, width, height, x, y, text, colour) blits glyphs directly. No font file dependency; glyphs are compile-time const arrays.

License

MIT. See LICENSE.