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feat: implement crop functionality with self-contained widget

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- Inspired by cosmic-viewer's crop implementation (https://codeberg.org/bhh32/cosmic-viewer)
- Add crop support for all document types (Raster, Vector, Portable)
This commit is contained in:
wfx 2026-01-22 20:40:36 +01:00
parent 9399a008c4
commit 3cf99ad19d
20 changed files with 1042 additions and 103 deletions
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96
src/app/update.rs
View file

@ -40,22 +40,24 @@ pub fn update(model: &mut AppModel, msg: &AppMessage, config: &AppConfig) -> Upd
AppMessage::GotoPage(page) => {
if let Some(doc) = &mut model.document
&& let Err(e) = doc.go_to_page(*page) {
log::error!("Failed to navigate to page {}: {}", page, e);
}
&& let Err(e) = doc.go_to_page(*page)
{
log::error!("Failed to navigate to page {page}: {e}");
}
}
// ---- Thumbnail generation -------------------------------------------------
AppMessage::GenerateThumbnailPage(page) => {
if let Some(doc) = &mut model.document
&& let Some(next_page) = doc.generate_thumbnail_page(*page) {
return UpdateResult::Task(Task::batch([
Task::future(async move {
Action::App(AppMessage::GenerateThumbnailPage(next_page))
}),
Task::done(Action::App(AppMessage::RefreshView)),
]));
}
&& let Some(next_page) = doc.generate_thumbnail_page(*page)
{
return UpdateResult::Task(Task::batch([
Task::future(async move {
Action::App(AppMessage::GenerateThumbnailPage(next_page))
}),
Task::done(Action::App(AppMessage::RefreshView)),
]));
}
}
AppMessage::RefreshView => {
@ -110,6 +112,10 @@ pub fn update(model: &mut AppModel, msg: &AppMessage, config: &AppConfig) -> Upd
// ---- Tool modes ----------------------------------------------------------
AppMessage::ToggleCropMode => {
eprintln!(
"DEBUG: ToggleCropMode received, current tool_mode={:?}",
model.tool_mode
);
model.tool_mode = if model.tool_mode == ToolMode::Crop {
ToolMode::None
} else {
@ -124,6 +130,68 @@ pub fn update(model: &mut AppModel, msg: &AppMessage, config: &AppConfig) -> Upd
};
}
// ---- Crop operations -----------------------------------------------------
AppMessage::StartCrop => {
if model.document.is_some() {
model.tool_mode = ToolMode::Crop;
model.crop_selection.reset();
}
}
AppMessage::CancelCrop => {
if model.tool_mode == ToolMode::Crop {
model.tool_mode = ToolMode::None;
model.crop_selection.reset();
}
}
AppMessage::ApplyCrop => {
if model.tool_mode == ToolMode::Crop {
if let Some((x, y, width, height)) = model.crop_selection.as_pixel_rect() {
if let Some(path) = &model.current_path {
if let Some(doc) = &model.document {
match document::file::save_crop_as(doc, path, x, y, width, height) {
Ok(new_path) => {
document::file::open_single_file(model, &new_path);
model.tool_mode = ToolMode::None;
model.crop_selection.reset();
}
Err(e) => {
model.set_error(format!("Crop save failed: {e}"));
}
}
}
}
}
}
}
AppMessage::CropDragStart { x, y, handle } => {
if model.tool_mode == ToolMode::Crop {
if *handle == super::view::crop::DragHandle::None {
model.crop_selection.start_new_selection(*x, *y);
} else {
model.crop_selection.start_handle_drag(*handle, *x, *y);
}
}
}
AppMessage::CropDragMove { x, y } => {
if model.tool_mode == ToolMode::Crop {
if let Some(doc) = &model.document {
let (w, h) = doc.dimensions();
#[allow(clippy::cast_precision_loss)]
model.crop_selection.update_drag(*x, *y, w as f32, h as f32);
}
}
}
AppMessage::CropDragEnd => {
if model.tool_mode == ToolMode::Crop {
model.crop_selection.end_drag();
}
}
// ---- Save operations -----------------------------------------------------
AppMessage::SaveAs => {
save_as(model);
}
// ---- Document transformations --------------------------------------------
AppMessage::FlipHorizontal => {
if let Some(doc) = &mut model.document {
@ -216,3 +284,9 @@ fn set_as_wallpaper(model: &mut AppModel) {
};
document::set_as_wallpaper(path);
}
fn save_as(model: &mut AppModel) {
// TODO: Implement file dialog for save path
// For now, show error that this needs UI integration
model.set_error("Save As: File dialog not yet implemented");
}