Did a lot of work off-repo, basically init

2021-03-11 13:27:35 -06:00
parent 2e9b2ad2b1
commit d0bb43cc8f
16 changed files with 1788 additions and 0 deletions
--- a/main.go
+++ b/main.go
@@ -0,0 +1,193 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"io/fs"
+
+	"github.com/fivemoreminix/diesel/ui"
+	"github.com/gdamore/tcell/v2"
+)
+
+var theme = ui.Theme{}
+
+var focusedComponent ui.Component = nil
+
+func changeFocus(to ui.Component) {
+	if focusedComponent != nil {
+		focusedComponent.SetFocused(false)
+	}
+	focusedComponent = to
+	to.SetFocused(true)
+}
+
+func main() {
+	s, e := tcell.NewScreen()
+	if e != nil {
+		fmt.Fprintf(os.Stderr, "%v\n", e)
+		os.Exit(1)
+	}
+	if e := s.Init(); e != nil {
+		fmt.Fprintf(os.Stderr, "%v\n", e)
+		os.Exit(1)
+	}
+	defer s.Fini() // Useful for handling panics
+
+	// defer func() {
+	// 	if err := recover(); err != nil {
+	// 		s.Fini()
+	// 		fmt.Fprintln(os.Stderr, err)
+	// 	}
+	// }()
+
+	sizex, sizey := s.Size()
+
+	tabContainer := ui.NewTabContainer(&theme)
+	tabContainer.SetPos(0, 1)
+	tabContainer.SetSize(sizex, sizey-1)
+
+	var fileSelector *ui.FileSelectorDialog // if nil, we don't draw it
+
+	bar := ui.NewMenuBar(nil, &theme)
+
+	barFocused := false
+
+	// TODO: load menus in another function
+	bar.Menus = append(bar.Menus, ui.NewMenu("File", &theme, []ui.Item{&ui.ItemEntry{Name: "New File", Callback: func() {
+		textEdit := ui.NewTextEdit(&s, "", "", &theme) // No file path, no contents
+		tabContainer.AddTab("noname", textEdit)
+	}}, &ui.ItemEntry{Name: "Open...", Callback: func() {
+		callback := func(filePaths []string) {
+			for _, path := range filePaths {
+				file, err := os.Open(path)
+				if err != nil {
+					panic("Could not open file at path " + path)
+				}
+				defer file.Close()
+
+				bytes, err := ioutil.ReadAll(file)
+				if err != nil {
+					panic("Could not read all of file")
+				}
+
+				textEdit := ui.NewTextEdit(&s, path, string(bytes), &theme)
+				tabContainer.AddTab(path, textEdit)
+			}
+			fileSelector = nil // Hide the file selector
+			changeFocus(tabContainer)
+			barFocused = false
+		}
+		fileSelector = ui.NewFileSelectorDialog(
+			&s,
+			"Comma-separated files or a directory",
+			true,
+			&theme,
+			callback,
+			func() { // Dialog is canceled
+				fileSelector = nil
+				changeFocus(bar)
+				barFocused = true
+			},
+		)
+		changeFocus(fileSelector)
+	}}, &ui.ItemEntry{Name: "Save", Callback: func() {
+		if tabContainer.GetTabCount() > 0 {
+			tab := tabContainer.GetTab(tabContainer.Selected)
+			te := tab.Child.(*ui.TextEdit)
+			if len(te.FilePath) > 0 {
+				contents := te.String()
+
+				// Write the contents into the file, creating one if it does
+				// not exist.
+				err := ioutil.WriteFile(te.FilePath, []byte(contents), fs.ModePerm)
+				if err != nil {
+					panic("Could not write file at path " + te.FilePath)
+				}
+			}
+		}
+	}}, &ui.ItemEntry{Name: "Save As...", Callback: func() {
+		// TODO: implement a "Save as" dialog system, and show that when trying to save noname files
+		callback := func(filePaths []string) {
+			fileSelector = nil // Hide the file selector
+		}
+
+		fileSelector = ui.NewFileSelectorDialog(
+			&s,
+			"Select a file to overwrite",
+			false,
+			&theme,
+			callback,
+			func() { // Dialog canceled
+				fileSelector = nil
+				changeFocus(bar)
+			},
+		)
+		changeFocus(fileSelector)
+	}}, &ui.ItemSeparator{}, &ui.ItemEntry{Name: "Exit", Callback: func() {
+		s.Fini()
+		os.Exit(0)
+	}}}))
+
+	bar.Menus = append(bar.Menus, ui.NewMenu("Edit", &theme, []ui.Item{&ui.ItemEntry{Name: "New", Callback: func() {
+		s.Beep()
+	}}}))
+
+	bar.Menus = append(bar.Menus, ui.NewMenu("Search", &theme, []ui.Item{&ui.ItemEntry{Name: "New", Callback: func() {
+		s.Beep()
+	}}}))
+
+	changeFocus(tabContainer) // TabContainer is focused by default
+
+main_loop:
+	for {
+		s.Clear()
+
+		// Draw background (grey and black checkerboard)
+		ui.DrawRect(s, 0, 0, sizex, sizey, '▚', tcell.Style{}.Foreground(tcell.ColorGrey).Background(tcell.ColorBlack))
+
+		if tabContainer.GetTabCount() > 0 { // Draw the tab container only if a tab is open
+			tabContainer.Draw(s)
+		}
+		bar.Draw(s) // Always draw the menu bar
+
+		if fileSelector != nil {
+			// Update fileSelector dialog pos and size
+			diagMinX, diagMinY := fileSelector.GetMinSize()
+			fileSelector.SetSize(diagMinX, diagMinY)
+			fileSelector.SetPos(sizex/2-diagMinX/2, sizey/2-diagMinY/2) // Center
+
+			fileSelector.Draw(s)
+		}
+
+		s.Show()
+
+		switch ev := s.PollEvent().(type) {
+		case *tcell.EventResize:
+			sizex, sizey = s.Size()
+
+			bar.SetSize(sizex, 1)
+			tabContainer.SetSize(sizex, sizey-1)
+
+			s.Sync() // Redraw everything
+		case *tcell.EventKey:
+			// On Escape, we change focus between editor and the MenuBar.
+			if fileSelector == nil { // While no dialog is present...
+				if ev.Key() == tcell.KeyEscape {
+					barFocused = !barFocused
+					if barFocused {
+						changeFocus(bar)
+					} else {
+						changeFocus(tabContainer)
+					}
+				}
+				// Ctrl + Q is a shortcut to exit
+				if ev.Key() == tcell.KeyCtrlQ { // TODO: replace with shortcut keys in menus
+					break main_loop
+				}
+			}
+
+			focusedComponent.HandleEvent(ev)
+		}
+	}
+}