goblin/src/gui/views/scan.rs

// Copyright 2024 The Grim Developers
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use egui::scroll_area::ScrollBarVisibility;
use egui::{Id, ScrollArea};

use crate::gui::Colors;
use crate::gui::icons::COPY;
use crate::gui::platform::PlatformCallbacks;
use crate::gui::views::types::QrScanResult;
use crate::gui::views::{CameraContent, Modal, View};

/// QR code scanning content.
pub struct CameraScanContent {
	/// Camera content.
	camera_content: Option<CameraContent>,
	/// Scan result.
	qr_scan_result: Option<QrScanResult>,
}

impl Default for CameraScanContent {
	fn default() -> Self {
		Self {
			camera_content: Some(CameraContent::default()),
			qr_scan_result: None,
		}
	}
}

impl CameraScanContent {
	/// Draw [`Modal`] content.
	pub fn modal_ui(
		&mut self,
		ui: &mut egui::Ui,
		cb: &dyn PlatformCallbacks,
		mut on_result: impl FnMut(&QrScanResult),
	) {
		// Show scan result if exists or show camera content while scanning.
		if let Some(result) = &self.qr_scan_result.clone() {
			Self::result_ui(
				ui,
				result,
				cb,
				|| {
					Modal::close();
				},
				|| {
					self.qr_scan_result = None;
					cb.start_camera();
					Modal::set_title(t!("scan_qr"));
				},
			);
		} else if let Some(camera_content) = self.camera_content.as_mut() {
			if let Some(result) = camera_content.qr_scan_result() {
				cb.stop_camera();
				self.camera_content = None;
				on_result(&result);

				// Set result and rename modal title.
				self.qr_scan_result = Some(result);
				Modal::set_title(t!("scan_result"));
			} else {
				// Draw camera content.
				ui.add_space(6.0);
				self.camera_content.as_mut().unwrap().ui(ui, cb);
				ui.add_space(12.0);
				ui.vertical_centered_justified(|ui| {
					View::button(
						ui,
						t!("modal.cancel"),
						Colors::white_or_black(false),
						|| {
							cb.stop_camera();
							self.camera_content = None;
							Modal::close();
						},
					);
				});
			}
		}
		ui.add_space(6.0);
	}

	/// Draw scan result content.
	pub fn result_ui(
		ui: &mut egui::Ui,
		result: &QrScanResult,
		cb: &dyn PlatformCallbacks,
		on_close: impl FnOnce(),
		on_repeat: impl FnOnce(),
	) {
		let mut result_text = result.text();
		View::horizontal_line(ui, Colors::item_stroke());
		ui.add_space(3.0);
		ScrollArea::vertical()
			.id_salt(Id::from("qr_scan_result_input"))
			.scroll_bar_visibility(ScrollBarVisibility::AlwaysHidden)
			.max_height(128.0)
			.auto_shrink([false; 2])
			.show(ui, |ui| {
				ui.add_space(7.0);
				egui::TextEdit::multiline(&mut result_text)
					.font(egui::TextStyle::Small)
					.desired_rows(5)
					.interactive(false)
					.desired_width(f32::INFINITY)
					.show(ui);
				ui.add_space(6.0);
			});
		ui.add_space(2.0);
		View::horizontal_line(ui, Colors::item_stroke());
		ui.add_space(10.0);

		// Show copy button.
		ui.vertical_centered(|ui| {
			let copy_text = format!("{} {}", COPY, t!("copy"));
			View::button(ui, copy_text, Colors::white_or_black(false), || {
				cb.copy_string_to_buffer(result_text.to_string());
			});
		});
		ui.add_space(10.0);
		View::horizontal_line(ui, Colors::item_stroke());
		ui.add_space(6.0);

		// Setup spacing between buttons.
		ui.spacing_mut().item_spacing = egui::Vec2::new(8.0, 0.0);

		ui.columns(2, |columns| {
			columns[0].vertical_centered_justified(|ui| {
				View::button(ui, t!("close"), Colors::white_or_black(false), || {
					on_close();
				});
			});
			columns[1].vertical_centered_justified(|ui| {
				View::button(ui, t!("repeat"), Colors::white_or_black(false), || {
					on_repeat();
				});
			});
		});
	}
}