| 🛟 Updated. 28d5985 k33g 19h ago | 1 | // Package app assembles the editor: it owns the screen, the desktop of |
| 2 | // windows, the menu bar, the status bar and the modal stack, and it routes |
| 3 | // every key and click to whichever of them should see it. |
| 4 | // |
| 5 | // Everything below it is reusable on its own; this package is where the |
| 6 | // decisions about *this* editor live. |
| 7 | package app |
| 8 | |
| 9 | import ( |
| 10 | "context" |
| 11 | "fmt" |
| 12 | "sync/atomic" |
| 13 | "time" |
| 14 | |
| 15 | "github.com/gdamore/tcell/v2" |
| 16 | |
| 📦 Turbo Core f3ade8d k33g 12h ago | 17 | "rickub.com/turbo-editors/turbo-core/editor" |
| 18 | "rickub.com/turbo-editors/turbo-core/filetree" |
| 19 | "rickub.com/turbo-editors/turbo-core/profile" |
| 20 | "rickub.com/turbo-editors/turbo-core/settings" |
| 21 | "rickub.com/turbo-editors/turbo-core/terminal" |
| 22 | "rickub.com/turbo-editors/turbo-core/theme" |
| 23 | "rickub.com/turbo-editors/turbo-core/ui" |
| 🛟 Updated. 28d5985 k33g 19h ago | 24 | ) |
| 25 | |
| 26 | // menuBarHeight and statusBarHeight are the rows the furniture takes off the |
| 27 | // top and bottom of the screen. |
| 28 | const ( |
| 29 | menuBarHeight = 1 |
| 30 | statusBarHeight = 1 |
| 31 | newWindowOffset = 2 // each new window is offset from the last |
| 32 | maxWindowOffsets = 8 |
| 33 | ) |
| 34 | |
| 35 | // modal is a dialog waiting for an answer, and what to do with it. |
| 36 | type modal struct { |
| 37 | dialog *ui.Dialog |
| 38 | onClose func(ui.Result) |
| 39 | } |
| 40 | |
| 41 | // App is the running editor. |
| 42 | type App struct { |
| 43 | screen tcell.Screen |
| 44 | |
| 45 | // profile is which editor this is: its name, its language, its own |
| 46 | // directory, its language server, the files it offers to create. Everything |
| 47 | // that would otherwise be a hardcoded "turbo-go" is read from here. |
| 48 | profile profile.Profile |
| 49 | |
| 50 | theme *theme.Theme |
| 51 | themeName string |
| 52 | |
| 53 | desktop *ui.Desktop |
| 54 | menu *ui.MenuBar |
| 55 | status *ui.StatusBar |
| 56 | modals []modal |
| 57 | completion *CompletionBox |
| 58 | |
| 59 | clipboard *editor.Clipboard |
| 60 | language *Language |
| 61 | |
| 62 | // terminals maps a window to the shell inside it. A window that is not in |
| 63 | // here holds a file. |
| 64 | terminals map[*ui.Window]*terminal.View |
| 65 | |
| 66 | // agents maps a window to the conversation inside it. A window in neither |
| 67 | // this nor terminals holds a file. |
| 68 | agents map[*ui.Window]*agentWindow |
| 69 | |
| 70 | // permissions are the agents waiting for somebody to answer them. It is |
| 71 | // written from each session's reading goroutine and read by the event |
| 72 | // loop, which is why it carries its own lock. |
| 73 | permissions pendingPermissions |
| 74 | |
| 75 | // agentFiles guards the open buffers against being read by a session's |
| 76 | // goroutine while the event loop is writing them. |
| 77 | agentFiles agentFileLock |
| 78 | |
| 79 | // running is the command whose output is showing in a dialog, when one is. |
| 80 | running *toolRun |
| 81 | |
| 82 | // toolValues is what was last typed into a tool's parameters box, by tool |
| 83 | // name and then by label. It lives for the session only: a value somebody |
| 84 | // typed this afternoon is not a decision the project made, so it does not |
| 85 | // belong in the project's own directory. |
| 86 | toolValues map[string]map[string]string |
| 87 | |
| 88 | // toolsRan says a command from the Go menu has finished, so the files it |
| 89 | // may have rewritten want re-reading. It is set from the reading goroutine |
| 90 | // and cleared by the event loop, which is why it is atomic. |
| 91 | toolsRan atomic.Bool |
| 92 | |
| 93 | // toolsStamp is what the tools file looked like when the menu bar was last |
| 94 | // built. The menus the file asks for are part of the bar, so a change to it |
| 95 | // has to rebuild the bar and not only the items inside a menu. |
| 96 | toolsStamp fileStamp |
| 97 | |
| 98 | // treeWindow and treeView are the project tree, when one is open. There is |
| 99 | // at most one of them, so a pair of fields says it better than a map. |
| 100 | treeWindow *ui.Window |
| 101 | treeView *filetree.View |
| 102 | |
| 103 | // settingsPath is the project settings file in use, or "" when the project |
| 104 | // has none. It is where a setting changed in the editor is written back. |
| 105 | settingsPath string |
| 106 | // autosave is the pending automatic save, when the project asked for one. |
| 107 | autosave autosave |
| 108 | // now is the clock, so that autosave's deadlines can be tested without |
| 109 | // waiting for them. |
| 110 | now func() time.Time |
| 111 | |
| 112 | lastSearch string |
| 113 | lastMatchCase bool |
| 114 | windowsOpened int |
| 115 | announced bool // the open documents have been told to the server |
| 116 | quitting bool |
| 117 | } |
| 118 | |
| 119 | // New returns an editor drawing on screen, with the named theme, being the |
| 120 | // editor the profile describes. |
| 121 | // |
| 122 | // An unknown theme name falls back to the default rather than failing: a typo |
| 123 | // in a configuration file should not stop the editor opening. |
| 124 | // |
| 125 | // editor := app.New(screen, "turbo-dark", golang.Profile()) |
| 126 | // editor.NewFile() |
| 127 | // editor.Run() |
| 128 | func New(screen tcell.Screen, themeName string, p profile.Profile) *App { |
| 129 | a := &App{ |
| 130 | screen: screen, |
| 131 | profile: p, |
| 132 | desktop: ui.NewDesktop(), |
| 133 | status: ui.NewStatusBar(), |
| 134 | completion: &CompletionBox{}, |
| 135 | clipboard: &editor.Clipboard{}, |
| 136 | language: NewLanguage(p.Server, p.Name), |
| 137 | terminals: map[*ui.Window]*terminal.View{}, |
| 138 | agents: map[*ui.Window]*agentWindow{}, |
| 139 | now: time.Now, |
| 140 | } |
| 141 | a.autosave.delay = settings.DefaultAutosaveDelay |
| 142 | |
| 143 | a.setTheme(themeName) |
| 144 | // Stamped before the bar is built, so a tools file written between the two |
| 145 | // is picked up by the next turn of the loop rather than missed. |
| 146 | a.toolsStamp = a.toolsFileStamp() |
| 147 | a.menu = a.buildMenus() |
| 148 | a.status.SetItems(a.statusItems()...) |
| 149 | a.completion.OnAccept = a.acceptCompletion |
| 150 | a.language.OnUpdate = a.wake |
| 151 | return a |
| 152 | } |
| 153 | |
| 154 | // Profile returns which editor this is: its name, its language, and everything |
| 155 | // else that differs between one editor built on this library and another. |
| 156 | func (a *App) Profile() profile.Profile { return a.profile } |
| 157 | |
| 158 | // Theme returns the theme currently in use. |
| 159 | func (a *App) Theme() *theme.Theme { return a.theme } |
| 160 | |
| 161 | // ThemeName returns the name of the theme currently in use. |
| 162 | func (a *App) ThemeName() string { return a.themeName } |
| 163 | |
| 164 | // UseSettings applies a project's settings and remembers where they came |
| 165 | // from, so that changing a setting in the editor can be written back. |
| 166 | // |
| 167 | // The theme is not applied here: the caller resolves it first, because a |
| 168 | // -theme flag on the command line overrides the project's choice and only the |
| 169 | // caller knows whether one was given. |
| 170 | // |
| 171 | // s, err := settings.Load(p, dir) |
| 172 | // if err == nil { |
| 173 | // editor.UseSettings(s, settings.Path(p, dir)) |
| 174 | // } |
| 175 | func (a *App) UseSettings(s settings.Settings, path string) { |
| 176 | a.settingsPath = path |
| 177 | a.SetAutosave(s.Autosave, s.AutosaveDelay) |
| 178 | } |
| 179 | |
| 180 | // SettingsPath returns the project settings file the editor is following, or |
| 181 | // "" when the project has none. |
| 182 | func (a *App) SettingsPath() string { return a.settingsPath } |
| 183 | |
| 184 | // setTheme loads a theme by name, falling back to the default. |
| 185 | func (a *App) setTheme(name string) { |
| 186 | loaded, err := theme.Load(name, a.profile.ThemeDir()) |
| 187 | if err != nil { |
| 188 | a.theme, a.themeName = theme.Default(a.profile.ThemeDir()), theme.DefaultName |
| 189 | } else { |
| 190 | a.theme, a.themeName = loaded, name |
| 191 | } |
| 192 | a.applyCursorStyle() |
| 193 | } |
| 194 | |
| 195 | // applyCursorStyle tells the terminal to draw its cursor as a solid block in |
| 196 | // the theme's own colour. |
| 197 | // |
| 198 | // This matters more than it sounds. A terminal draws its cursor *over* the |
| 199 | // cell, in whatever colour the user configured for some other palette, and on |
| 200 | // a dark theme that is very often a dark cursor on a dark background — a cell |
| 201 | // painted underneath does not help, because the terminal's block covers it. |
| 202 | // Naming the colour here is the only way the theme can win. |
| 203 | // |
| 204 | // Terminals that support neither the shape nor the colour ignore this, which |
| 205 | // is why the cell underneath is still painted as a fallback. |
| 206 | func (a *App) applyCursorStyle() { |
| 207 | a.screen.SetCursorStyle(tcell.CursorStyleSteadyBlock, cursorColor(a.theme)) |
| 208 | } |
| 209 | |
| 210 | // cursorColor returns the colour a block cursor should be filled with: the |
| 211 | // background of the theme's cursor style, since that is what a filled block |
| 212 | // shows. |
| 213 | func cursorColor(th *theme.Theme) tcell.Color { |
| 214 | _, background, _ := th.Style(theme.KeyEditorCursor).Decompose() |
| 215 | return background |
| 216 | } |
| 217 | |
| 218 | // StartLanguageServer starts the editor's language server in root, in the |
| 219 | // background so that a slow start-up does not hold the first keystroke up. |
| 220 | func (a *App) StartLanguageServer(ctx context.Context, root string) { |
| 221 | go a.language.Start(ctx, root) |
| 222 | } |
| 223 | |
| 224 | // announceOpenDocuments tells the language server about every file that is |
| 225 | // already open, the first time there is anybody to tell. |
| 226 | // |
| 227 | // The command opens the files named on its command line and *then* starts the |
| 228 | // server, so the didOpen sent at that moment reaches nothing. Without this |
| 229 | // second announcement the server never learns the documents exist, ignores |
| 230 | // every didChange that follows, and answers completions from whatever is on |
| 231 | // disk — which is to say, not from what has been typed. |
| 232 | // |
| 233 | // This is checked on every turn of the event loop rather than driven by an |
| 234 | // event, because an event can be dropped: tcell's queue is bounded, PostEvent |
| 235 | // fails when it is full, and start-up — when gopls publishes diagnostics for |
| 236 | // the whole module — is exactly when it is fullest. Correctness must not |
| 237 | // depend on a message that is allowed to go missing. |
| 238 | func (a *App) announceOpenDocuments() { |
| 239 | if a.announced || !a.language.Ready() { |
| 240 | return |
| 241 | } |
| 242 | a.announced = true |
| 243 | |
| 244 | for _, window := range a.desktop.Windows() { |
| 245 | view, ok := window.Content().(*editor.View) |
| 246 | if !ok { |
| 247 | continue |
| 248 | } |
| 249 | a.language.DidOpen(view.Buffer().Path(), view.Buffer().Text()) |
| 250 | } |
| 251 | } |
| 252 | |
| 253 | // Language returns the language-server side of the editor. |
| 254 | func (a *App) Language() *Language { return a.language } |
| 255 | |
| 256 | // Run draws and handles events until the user asks to leave. |
| 257 | func (a *App) Run() error { |
| 258 | for !a.quitting { |
| 259 | a.tick() |
| 260 | a.layout() |
| 261 | a.draw() |
| 262 | |
| 263 | event := a.screen.PollEvent() |
| 264 | if event == nil { |
| 265 | return nil // the screen was finalised from under us |
| 266 | } |
| 267 | a.handle(event) |
| 268 | } |
| 269 | return nil |
| 270 | } |
| 271 | |
| 272 | // tick is the work the loop does before it draws, every turn. |
| 273 | // |
| 274 | // Everything here is **state-driven**: each of these looks at what is true now |
| 275 | // rather than waiting to be told. That is deliberate and it is the same reason |
| 276 | // each time — the only way to wake this loop from another goroutine is |
| 277 | // PostEvent, which drops what does not fit in its queue, so anything that |
| 278 | // depended on a message arriving would fail exactly when the editor is busiest. |
| 279 | // A dropped wake-up here costs a late turn, never a lost one. |
| 280 | // |
| 281 | // It is a method rather than five lines inside Run so that a test can take one |
| 282 | // turn of the loop, which is the only way to test any of it: Run itself blocks |
| 283 | // in PollEvent. |
| 284 | func (a *App) tick() { |
| 285 | a.announceOpenDocuments() |
| 286 | a.refreshToolMenus() |
| 287 | a.refreshRunningTool() |
| 288 | a.reloadAfterTools() |
| 289 | a.saveDueDocuments() |
| 290 | a.refreshTerminalTitles() |
| 291 | a.refreshAgentTitles() |
| 292 | a.askNextPermission() |
| 293 | a.refreshMarks() |
| 294 | } |
| 295 | |
| 296 | // Tick does one turn of the event loop's state-driven work, without waiting for |
| 297 | // an event. |
| 298 | // |
| 299 | // Run does this for itself before every frame; it is exported for the same |
| 300 | // reason Render is, so that an editor built on this library can drive itself |
| 301 | // end to end from a test — announcing open documents to a language server that |
| 302 | // has just come up, say — with no terminal and no event loop. |
| 303 | func (a *App) Tick() { a.tick() } |
| 304 | |
| 305 | // Handle routes one event through the whole chain, exactly as the event loop |
| 306 | // does. It is exported alongside Tick and Render, and for the same reason. |
| 307 | // |
| 308 | // editor.Handle(tcell.NewEventKey(tcell.KeyRune, 'x', tcell.ModNone)) |
| 309 | // editor.Tick() |
| 310 | // editor.Render() |
| 311 | func (a *App) Handle(event tcell.Event) { a.handle(event) } |
| 312 | |
| 313 | // ActiveView returns the editing view of the window in front, or nil when the |
| 314 | // front window is not a file — a terminal, or the project tree — and when there |
| 315 | // is no window at all. |
| 316 | func (a *App) ActiveView() *editor.View { return a.activeView() } |
| 317 | |
| 318 | // Quitting reports whether the editor is on its way out, which is what ends |
| 319 | // the event loop. |
| 320 | func (a *App) Quitting() bool { return a.quitting } |
| 321 | |
| 322 | // wake makes the event loop go round again, so that something which happened |
| 323 | // off the main goroutine — a batch of diagnostics, say — reaches the screen. |
| 324 | // |
| 325 | // The post is allowed to fail: a full queue means a redraw is already coming. |
| 326 | func (a *App) wake() { |
| 327 | _ = a.screen.PostEvent(tcell.NewEventInterrupt(nil)) |
| 328 | } |
| 329 | |
| 330 | // screenRect returns the whole terminal. |
| 331 | func (a *App) screenRect() ui.Rect { |
| 332 | width, height := a.screen.Size() |
| 333 | return ui.Rect{W: width, H: height} |
| 334 | } |
| 335 | |
| 336 | // desktopRect returns the area between the menu bar and the status bar. |
| 337 | func (a *App) desktopRect() ui.Rect { |
| 338 | screen := a.screenRect() |
| 339 | return ui.Rect{ |
| 340 | X: 0, |
| 341 | Y: menuBarHeight, |
| 342 | W: screen.W, |
| 343 | H: max(screen.H-menuBarHeight-statusBarHeight, 0), |
| 344 | } |
| 345 | } |
| 346 | |
| 347 | // layout places the furniture, which must happen again after every resize. |
| 348 | func (a *App) layout() { |
| 349 | screen := a.screenRect() |
| 350 | a.menu.SetBounds(ui.Rect{W: screen.W, H: menuBarHeight}) |
| 351 | a.status.SetBounds(ui.Rect{Y: screen.H - statusBarHeight, W: screen.W, H: statusBarHeight}) |
| 352 | a.desktop.SetBounds(a.desktopRect()) |
| 353 | } |
| 354 | |
| 355 | // draw paints the whole screen, back to front. |
| 356 | func (a *App) draw() { |
| 357 | painter := ui.NewPainter(a.screen) |
| 358 | a.screen.HideCursor() |
| 359 | |
| 360 | a.desktop.Draw(painter.Sub(a.desktop.Bounds()), a.theme) |
| 361 | a.updateStatus() |
| 362 | a.status.Draw(painter, a.theme) |
| 363 | a.menu.Draw(painter, a.theme) |
| 364 | |
| 365 | for _, m := range a.modals { |
| 366 | m.dialog.Draw(painter, a.theme) |
| 367 | } |
| 368 | a.completion.Draw(painter, a.theme) |
| 369 | |
| 370 | a.screen.Show() |
| 371 | } |
| 372 | |
| 373 | // updateStatus refreshes what the status bar shows on the right: the cursor |
| 374 | // position, and whatever the language server has to say. |
| 375 | func (a *App) updateStatus() { |
| 376 | view := a.activeView() |
| 377 | if view == nil { |
| 378 | a.status.SetExtra(a.language.Status()) |
| 379 | return |
| 380 | } |
| 381 | |
| 382 | extra := view.CursorStatus() |
| 383 | if diagnostic, ok := a.language.FirstError(view.Buffer().Path()); ok { |
| 384 | extra = fmt.Sprintf("%s ⚠ %s", extra, diagnostic.Message) |
| 385 | } else { |
| 386 | extra = fmt.Sprintf("%s %s", extra, a.language.Status()) |
| 387 | } |
| 388 | a.status.SetExtra(extra) |
| 389 | } |
| 390 | |
| 391 | // handle routes one event. |
| 392 | func (a *App) handle(event tcell.Event) { |
| 393 | switch typed := event.(type) { |
| 394 | case *tcell.EventResize: |
| 395 | a.resize() |
| 396 | case *tcell.EventKey: |
| 397 | a.handleKey(typed) |
| 398 | case *tcell.EventMouse: |
| 399 | a.handleMouse(typed) |
| 400 | } |
| 401 | a.announceOpenDocuments() |
| 402 | a.settleModals() |
| 403 | } |
| 404 | |
| 405 | // resize takes everything that is not the desktop to the new terminal size. |
| 406 | // |
| 407 | // The desktop and its windows follow in layout, on the next turn of the loop. |
| 408 | // What needs doing here is the floating furniture: a dialog placed in the |
| 409 | // middle of the old screen would be off-centre or half outside the new one, |
| 410 | // and the completion popup is anchored to a cursor that has just moved. |
| 411 | func (a *App) resize() { |
| 412 | a.screen.Sync() |
| 413 | a.completion.Hide() |
| 414 | |
| 415 | for _, m := range a.modals { |
| 416 | m.dialog.CenterIn(a.screenRect()) |
| 417 | } |
| 418 | } |
| 419 | |
| 420 | // handleKey offers a key to each layer in turn, front to back, and gives what |
| 421 | // nobody claimed to the window on the desktop. |
| 422 | func (a *App) handleKey(ev *tcell.EventKey) { |
| 423 | a.status.SetMessage("") // any keystroke clears a transient message |
| 424 | |
| 425 | for _, claims := range a.keyLayers() { |
| 426 | if claims(ev) { |
| 427 | return |
| 428 | } |
| 429 | } |
| 430 | |
| 431 | if a.desktop.HandleKey(ev) { |
| 432 | a.refreshCompletionPrefix() |
| 433 | } |
| 434 | } |
| 435 | |
| 436 | // keyLayers returns everything that may claim a key press before the window in |
| 437 | // front does, in the order they are offered it. |
| 438 | // |
| 439 | // The order is the design. An open completion list is what the next key is |
| 440 | // about; a modal dialog is exclusive by definition; an open menu owns the |
| 441 | // keyboard for as long as it is down; a focused terminal wants nearly |
| 442 | // everything, so it comes before the editor's own shortcuts; and the closed |
| 443 | // menu's Alt-letters and F10 come after the terminal precisely so a shell can |
| 444 | // have Alt-B and Alt-F. |
| 445 | func (a *App) keyLayers() []func(*tcell.EventKey) bool { |
| 446 | return []func(*tcell.EventKey) bool{ |
| 447 | a.completion.HandleKey, |
| 448 | a.handleModalKey, |
| 449 | a.handleOpenMenuKey, |
| 450 | a.handleTerminalKey, |
| 451 | a.menu.HandleKey, |
| 452 | a.handleShortcut, |
| 453 | } |
| 454 | } |
| 455 | |
| 456 | // handleModalKey gives a key to the topmost dialog, and reports that it was |
| 457 | // taken whether or not the dialog did anything with it: a modal swallows the |
| 458 | // keyboard for as long as it is up. |
| 459 | func (a *App) handleModalKey(ev *tcell.EventKey) bool { |
| 460 | if len(a.modals) == 0 { |
| 461 | return false |
| 462 | } |
| 463 | a.modals[len(a.modals)-1].dialog.HandleKey(ev) |
| 464 | return true |
| 465 | } |
| 466 | |
| 467 | // handleOpenMenuKey gives a key to the menu bar only while a menu is down. |
| 468 | func (a *App) handleOpenMenuKey(ev *tcell.EventKey) bool { |
| 469 | return a.menu.Open() && a.menu.HandleKey(ev) |
| 470 | } |
| 471 | |
| 472 | // handleTerminalKey sends a key to the shell in the front window. |
| 473 | func (a *App) handleTerminalKey(ev *tcell.EventKey) bool { |
| 474 | return a.terminalTakesKey(ev) && a.desktop.HandleKey(ev) |
| 475 | } |
| 476 | |
| 477 | // terminalTakesKey reports whether a key belongs to the shell in the front |
| 478 | // window rather than to the editor. |
| 479 | // |
| 480 | // A shell needs nearly every key: Ctrl-C interrupts, Ctrl-W deletes a word, |
| 481 | // Ctrl-F moves forward, Alt-B moves back. Letting the editor keep those would |
| 482 | // make the terminal useless. What the editor keeps is the handful of keys that |
| 483 | // are the way *out* of a terminal — see editorOwnedKey. |
| 484 | func (a *App) terminalTakesKey(ev *tcell.EventKey) bool { |
| 485 | return a.activeTerminal() != nil && !editorOwnedKey(ev) |
| 486 | } |
| 487 | |
| 488 | // editorOwnedKey reports whether the editor keeps a key even when a terminal |
| 489 | // has the focus: the function keys, Alt-X to leave, and Alt-digit to switch |
| 490 | // windows. |
| 491 | // |
| 492 | // Without these there would be no way out of a full-screen program running in |
| 493 | // a terminal window. |
| 494 | func editorOwnedKey(ev *tcell.EventKey) bool { |
| 495 | if ev.Key() >= tcell.KeyF1 && ev.Key() <= tcell.KeyF12 { |
| 496 | return true |
| 497 | } |
| 498 | if ev.Key() != tcell.KeyRune || ev.Modifiers()&tcell.ModAlt == 0 { |
| 499 | return false |
| 500 | } |
| 501 | |
| 502 | r := ev.Rune() |
| 503 | return r == 'x' || r == 'X' || (r >= '0' && r <= '9') |
| 504 | } |
| 505 | |
| 506 | // handleMouse offers a click to each layer in turn, front to back. |
| 507 | func (a *App) handleMouse(ev *tcell.EventMouse) { |
| 508 | if a.completion.HandleMouse(ev) { |
| 509 | return |
| 510 | } |
| 511 | if len(a.modals) > 0 { |
| 512 | a.modals[len(a.modals)-1].dialog.HandleMouse(ev) |
| 513 | return |
| 514 | } |
| 515 | if a.menu.HandleMouse(ev) { |
| 516 | return |
| 517 | } |
| 518 | if a.status.HandleMouse(ev) { |
| 519 | return |
| 520 | } |
| 521 | a.desktop.HandleMouse(ev) |
| 522 | } |
| 523 | |
| 524 | // handleShortcut runs the editor's global keys and reports whether it did. |
| 525 | func (a *App) handleShortcut(ev *tcell.EventKey) bool { |
| 526 | if a.handleWindowNumber(ev) { |
| 527 | return true |
| 528 | } |
| 529 | |
| 530 | switch { |
| 531 | case ev.Key() == tcell.KeyF1: |
| 532 | a.DescribeSymbol() |
| 533 | case ev.Key() == tcell.KeyF2: |
| 534 | a.SaveFile() |
| 535 | case ev.Key() == tcell.KeyF3: |
| 536 | a.OpenFile() |
| 537 | case ev.Key() == tcell.KeyF4: |
| 538 | a.NewFile() |
| 539 | case ev.Key() == tcell.KeyF6: |
| 540 | a.NextWindow() |
| 541 | case ev.Key() == tcell.KeyF8: |
| 542 | a.NewTerminal() |
| 543 | case ev.Key() == tcell.KeyF9: |
| 544 | a.ProjectTree() |
| 545 | case ev.Key() == tcell.KeyF7 && ev.Modifiers()&tcell.ModShift != 0: |
| 546 | a.FindPrevious() |
| 547 | case ev.Key() == tcell.KeyF7: |
| 548 | a.FindNext() |
| 549 | case ev.Key() == tcell.KeyF12 && ev.Modifiers()&tcell.ModShift != 0: |
| 550 | a.FindReferences() |
| 551 | case ev.Key() == tcell.KeyF12: |
| 552 | a.GoToDefinition() |
| 553 | case ev.Key() == tcell.KeyCtrlT: |
| 554 | a.SymbolInProject() |
| 555 | case ev.Key() == tcell.KeyCtrlF: |
| 556 | a.Find() |
| 557 | case ev.Key() == tcell.KeyCtrlG: |
| 558 | a.GoToLine() |
| 559 | case ev.Key() == tcell.KeyCtrlW: |
| 560 | a.CloseFile() |
| 561 | case ev.Key() == tcell.KeyRune && ev.Modifiers()&tcell.ModAlt != 0 && (ev.Rune() == 'x' || ev.Rune() == 'X'): |
| 562 | a.Quit() |
| 563 | default: |
| 564 | return false |
| 565 | } |
| 566 | return true |
| 567 | } |
| 568 | |
| 569 | // handleWindowNumber deals with Alt-1 … Alt-9, which pick a window, and Alt-0, |
| 570 | // which lists them. |
| 571 | func (a *App) handleWindowNumber(ev *tcell.EventKey) bool { |
| 572 | if ev.Key() != tcell.KeyRune || ev.Modifiers()&tcell.ModAlt == 0 { |
| 573 | return false |
| 574 | } |
| 575 | digit := ev.Rune() - '0' |
| 576 | if digit < 0 || digit > 9 { |
| 577 | return false |
| 578 | } |
| 579 | |
| 580 | if digit == 0 { |
| 581 | a.ListWindows() |
| 582 | return true |
| 583 | } |
| 584 | return a.desktop.FocusNumber(int(digit)) |
| 585 | } |
| 586 | |
| 587 | // pushModal puts a dialog in front of everything else. |
| 588 | func (a *App) pushModal(dialog *ui.Dialog, onClose func(ui.Result)) { |
| 589 | a.completion.Hide() |
| 590 | a.modals = append(a.modals, modal{dialog: dialog, onClose: onClose}) |
| 591 | } |
| 592 | |
| 593 | // settleModals closes the dialogs that have been answered and runs what they |
| 594 | // were waiting on. |
| 595 | // |
| 596 | // It runs after every event rather than inside the handlers, so that a dialog |
| 597 | // which opens another one does not nest event handling. |
| 598 | func (a *App) settleModals() { |
| 599 | for len(a.modals) > 0 { |
| 600 | top := a.modals[len(a.modals)-1] |
| 601 | if !top.dialog.Done() { |
| 602 | return |
| 603 | } |
| 604 | a.modals = a.modals[:len(a.modals)-1] |
| 605 | if top.onClose != nil { |
| 606 | top.onClose(top.dialog.Result()) |
| 607 | } |
| 608 | } |
| 609 | } |
| 610 | |
| 611 | // Message shows a one-line note on the status bar. |
| 612 | func (a *App) Message(text string) { a.status.SetMessage(text) } |
| 613 | |
| 614 | // ShowMessage opens a box with a message in it. |
| 615 | func (a *App) ShowMessage(title, message string) { |
| 616 | a.pushModal(NewMessageDialog(title, message, a.screenRect()), nil) |
| 617 | } |
| 618 | |
| 619 | // activeView returns the editor view of the front window, or nil when no file |
| 620 | // is open. |
| 621 | func (a *App) activeView() *editor.View { |
| 622 | window := a.desktop.Active() |
| 623 | if window == nil { |
| 624 | return nil |
| 625 | } |
| 626 | view, _ := editorViewOf(window) |
| 627 | return view |
| 628 | } |
| 629 | |
| 630 | // Modals returns how many dialogs are waiting, which the tests use to see that |
| 631 | // an action opened one. |
| 632 | func (a *App) Modals() int { return len(a.modals) } |
| 633 | |
| 634 | // TopModal returns the dialog in front, or nil when there is none. |
| 635 | func (a *App) TopModal() *ui.Dialog { |
| 636 | if len(a.modals) == 0 { |
| 637 | return nil |
| 638 | } |
| 639 | return a.modals[len(a.modals)-1].dialog |
| 640 | } |
| 641 | |
| 642 | // Desktop returns the desktop, so that tests and the main program can look at |
| 643 | // the windows without going through the screen. |
| 644 | func (a *App) Desktop() *ui.Desktop { return a.desktop } |
| 645 | |
| 646 | // Completion returns the completion popup. |
| 647 | func (a *App) Completion() *CompletionBox { return a.completion } |
| 648 | |
| 649 | // MenuBar returns the menu bar. |
| 650 | func (a *App) MenuBar() *ui.MenuBar { return a.menu } |
| 651 | |
| 652 | // Render lays the editor out and paints one frame. The event loop does this |
| 653 | // for itself; it is exported so a screenshot can be taken without one. |
| 654 | func (a *App) Render() { |
| 655 | a.layout() |
| 656 | a.draw() |
| 657 | } |
| 658 | |
| 659 | // StatusBar returns the status bar. |
| 660 | func (a *App) StatusBar() *ui.StatusBar { return a.status } |