1use gpui::{
2 canvas, div, fill, img, opaque_grey, point, size, AnyElement, AppContext, Bounds, Context,
3 Element, EventEmitter, FocusHandle, FocusableView, InteractiveElement, IntoElement, Model,
4 ParentElement, Render, Styled, Task, View, ViewContext, VisualContext, WeakView, WindowContext,
5};
6use persistence::IMAGE_VIEWER;
7use ui::{h_flex, prelude::*};
8
9use project::{Project, ProjectEntryId, ProjectPath};
10use std::{ffi::OsStr, path::PathBuf};
11use util::ResultExt;
12use workspace::{
13 item::{Item, ProjectItem},
14 ItemId, Pane, Workspace, WorkspaceId,
15};
16
17const IMAGE_VIEWER_KIND: &str = "ImageView";
18
19pub struct ImageItem {
20 path: PathBuf,
21 project_path: ProjectPath,
22}
23
24impl project::Item for ImageItem {
25 fn try_open(
26 project: &Model<Project>,
27 path: &ProjectPath,
28 cx: &mut AppContext,
29 ) -> Option<Task<gpui::Result<Model<Self>>>> {
30 let path = path.clone();
31 let project = project.clone();
32
33 let ext = path
34 .path
35 .extension()
36 .and_then(OsStr::to_str)
37 .unwrap_or_default();
38
39 let format = gpui::ImageFormat::from_extension(ext);
40 if format.is_some() {
41 Some(cx.spawn(|mut cx| async move {
42 let abs_path = project
43 .read_with(&cx, |project, cx| project.absolute_path(&path, cx))?
44 .ok_or_else(|| anyhow::anyhow!("Failed to find the absolute path"))?;
45
46 cx.new_model(|_| ImageItem {
47 path: abs_path,
48 project_path: path,
49 })
50 }))
51 } else {
52 None
53 }
54 }
55
56 fn entry_id(&self, _: &AppContext) -> Option<ProjectEntryId> {
57 None
58 }
59
60 fn project_path(&self, _: &AppContext) -> Option<ProjectPath> {
61 Some(self.project_path.clone())
62 }
63}
64
65pub struct ImageView {
66 path: PathBuf,
67 focus_handle: FocusHandle,
68}
69
70impl Item for ImageView {
71 type Event = ();
72
73 fn tab_content(
74 &self,
75 _detail: Option<usize>,
76 selected: bool,
77 _cx: &WindowContext,
78 ) -> AnyElement {
79 let title = self
80 .path
81 .file_name()
82 .unwrap_or_else(|| self.path.as_os_str())
83 .to_string_lossy()
84 .to_string();
85 Label::new(title)
86 .color(if selected {
87 Color::Default
88 } else {
89 Color::Muted
90 })
91 .into_any_element()
92 }
93
94 fn added_to_workspace(&mut self, workspace: &mut Workspace, cx: &mut ViewContext<Self>) {
95 let item_id = cx.entity_id().as_u64();
96 let workspace_id = workspace.database_id();
97 let image_path = self.path.clone();
98
99 cx.background_executor()
100 .spawn({
101 let image_path = image_path.clone();
102 async move {
103 IMAGE_VIEWER
104 .save_image_path(item_id, workspace_id, image_path)
105 .await
106 .log_err();
107 }
108 })
109 .detach();
110 }
111
112 fn serialized_item_kind() -> Option<&'static str> {
113 Some(IMAGE_VIEWER_KIND)
114 }
115
116 fn deserialize(
117 _project: Model<Project>,
118 _workspace: WeakView<Workspace>,
119 workspace_id: WorkspaceId,
120 item_id: ItemId,
121 cx: &mut ViewContext<Pane>,
122 ) -> Task<anyhow::Result<View<Self>>> {
123 cx.spawn(|_pane, mut cx| async move {
124 let image_path = IMAGE_VIEWER
125 .get_image_path(item_id, workspace_id)?
126 .ok_or_else(|| anyhow::anyhow!("No image path found"))?;
127
128 cx.new_view(|cx| ImageView {
129 path: image_path,
130 focus_handle: cx.focus_handle(),
131 })
132 })
133 }
134
135 fn clone_on_split(
136 &self,
137 _workspace_id: WorkspaceId,
138 cx: &mut ViewContext<Self>,
139 ) -> Option<View<Self>>
140 where
141 Self: Sized,
142 {
143 Some(cx.new_view(|cx| Self {
144 path: self.path.clone(),
145 focus_handle: cx.focus_handle(),
146 }))
147 }
148}
149
150impl EventEmitter<()> for ImageView {}
151impl FocusableView for ImageView {
152 fn focus_handle(&self, _cx: &AppContext) -> FocusHandle {
153 self.focus_handle.clone()
154 }
155}
156
157impl Render for ImageView {
158 fn render(&mut self, cx: &mut ViewContext<Self>) -> impl IntoElement {
159 let im = img(self.path.clone()).into_any();
160
161 div()
162 .track_focus(&self.focus_handle)
163 .size_full()
164 .child(
165 // Checkered background behind the image
166 canvas(
167 |_, _| (),
168 |bounds, _, cx| {
169 let square_size = 32.0;
170
171 let start_y = bounds.origin.y.0;
172 let height = bounds.size.height.0;
173 let start_x = bounds.origin.x.0;
174 let width = bounds.size.width.0;
175
176 let mut y = start_y;
177 let mut x = start_x;
178 let mut color_swapper = true;
179 // draw checkerboard pattern
180 while y <= start_y + height {
181 // Keeping track of the grid in order to be resilient to resizing
182 let start_swap = color_swapper;
183 while x <= start_x + width {
184 let rect = Bounds::new(
185 point(px(x), px(y)),
186 size(px(square_size), px(square_size)),
187 );
188
189 let color = if color_swapper {
190 opaque_grey(0.6, 0.4)
191 } else {
192 opaque_grey(0.7, 0.4)
193 };
194
195 cx.paint_quad(fill(rect, color));
196 color_swapper = !color_swapper;
197 x += square_size;
198 }
199 x = start_x;
200 color_swapper = !start_swap;
201 y += square_size;
202 }
203 },
204 )
205 .border_2()
206 .border_color(cx.theme().styles.colors.border)
207 .size_full()
208 .absolute()
209 .top_0()
210 .left_0(),
211 )
212 .child(
213 v_flex()
214 .h_full()
215 .justify_around()
216 .child(h_flex().w_full().justify_around().child(im)),
217 )
218 }
219}
220
221impl ProjectItem for ImageView {
222 type Item = ImageItem;
223
224 fn for_project_item(
225 _project: Model<Project>,
226 item: Model<Self::Item>,
227 cx: &mut ViewContext<Self>,
228 ) -> Self
229 where
230 Self: Sized,
231 {
232 Self {
233 path: item.read(cx).path.clone(),
234 focus_handle: cx.focus_handle(),
235 }
236 }
237}
238
239pub fn init(cx: &mut AppContext) {
240 workspace::register_project_item::<ImageView>(cx);
241 workspace::register_deserializable_item::<ImageView>(cx)
242}
243
244mod persistence {
245 use std::path::PathBuf;
246
247 use db::{define_connection, query, sqlez_macros::sql};
248 use workspace::{ItemId, WorkspaceDb, WorkspaceId};
249
250 define_connection! {
251 pub static ref IMAGE_VIEWER: ImageViewerDb<WorkspaceDb> =
252 &[sql!(
253 CREATE TABLE image_viewers (
254 workspace_id INTEGER,
255 item_id INTEGER UNIQUE,
256
257 image_path BLOB,
258
259 PRIMARY KEY(workspace_id, item_id),
260 FOREIGN KEY(workspace_id) REFERENCES workspaces(workspace_id)
261 ON DELETE CASCADE
262 ) STRICT;
263 )];
264 }
265
266 impl ImageViewerDb {
267 query! {
268 pub async fn update_workspace_id(
269 new_id: WorkspaceId,
270 old_id: WorkspaceId,
271 item_id: ItemId
272 ) -> Result<()> {
273 UPDATE image_viewers
274 SET workspace_id = ?
275 WHERE workspace_id = ? AND item_id = ?
276 }
277 }
278
279 query! {
280 pub async fn save_image_path(
281 item_id: ItemId,
282 workspace_id: WorkspaceId,
283 image_path: PathBuf
284 ) -> Result<()> {
285 INSERT OR REPLACE INTO image_viewers(item_id, workspace_id, image_path)
286 VALUES (?, ?, ?)
287 }
288 }
289
290 query! {
291 pub fn get_image_path(item_id: ItemId, workspace_id: WorkspaceId) -> Result<Option<PathBuf>> {
292 SELECT image_path
293 FROM image_viewers
294 WHERE item_id = ? AND workspace_id = ?
295 }
296 }
297 }
298}