66 lines
2.1 KiB
Rust
66 lines
2.1 KiB
Rust
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// SPDX-License-Identifier: MPL-2.0 OR Apache-2.0
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// src/app/document/portable.rs
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//
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// Portable documents (e.g. PDF) – basic model and rendering stub.
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use std::path::PathBuf;
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use cosmic::iced::widget::image as iced_image;
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use image::{GenericImageView, DynamicImage};
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/// Represents a portable document (PDF).
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pub struct PortableDocument {
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pub path: PathBuf,
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pub page_count: u32,
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pub current_page: u32,
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pub rotation: i32, // 0, 90, 180, 270; kept for future backend integration
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pub rendered: DynamicImage,
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pub handle: iced_image::Handle,
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// TODO: internal PDF handle from chosen backend
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}
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impl PortableDocument {
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/// Open a portable document and render the first page.
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///
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/// Currently this uses a dummy 1x1 transparent image as placeholder.
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pub fn open(path: PathBuf) -> anyhow::Result<Self> {
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// TODO: open PDF and render first page using a proper backend.
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let dummy = DynamicImage::new_rgba8(1, 1);
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let handle = Self::build_handle(&dummy);
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Ok(Self {
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path,
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page_count: 1, // TODO: query real page count from backend
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current_page: 0,
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rotation: 0,
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rendered: dummy,
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handle,
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})
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}
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/// Construct an iced image handle from a DynamicImage.
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fn build_handle(img: &DynamicImage) -> iced_image::Handle {
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let (w, h) = img.dimensions();
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let rgba = img.to_rgba8();
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let pixels = rgba.into_raw();
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iced_image::Handle::from_rgba(w, h, pixels)
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}
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/// Rebuild the handle after mutating `rendered`.
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pub fn refresh_handle(&mut self) {
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self.handle = Self::build_handle(&self.rendered);
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}
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/// Returns the dimensions of the currently rendered page.
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pub fn dimensions(&self) -> (u32, u32) {
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self.rendered.dimensions()
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}
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/// Re-render the current page with the current rotation.
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pub fn rerender_page(&mut self) {
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// TODO: use PDF backend and self.rotation / self.current_page
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// self.rendered = render_page_to_dynamic(...);
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// self.refresh_handle();
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}
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}
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