go fmt sources & add command-line file loading

main.go

@@ -2,9 +2,9 @@ package main
 
 import (
 	"fmt"
+	"io/fs"
 	"io/ioutil"
 	"os"
-	"io/fs"
 
 	"github.com/fivemoreminix/diesel/ui"
 	"github.com/gdamore/tcell/v2"
@@ -47,6 +47,25 @@ func main() {
 	tabContainer.SetPos(0, 1)
 	tabContainer.SetSize(sizex, sizey-1)
 
+	// Load files from command-line arguments
+	if len(os.Args) > 1 {
+		for _, path := range os.Args[1:] {
+			file, err := os.Open(path)
+			if err != nil {
+				panic("File could not be opened at path " + path)
+			}
+			defer file.Close()
+
+			bytes, err := ioutil.ReadAll(file)
+			if err != nil {
+				panic("Could not read all of " + path)
+			}
+
+			textEdit := ui.NewTextEdit(&s, path, string(bytes), &theme)
+			tabContainer.AddTab(path, textEdit)
+		}
+	}
+
 	var fileSelector *ui.FileSelectorDialog // if nil, we don't draw it
 
 	bar := ui.NewMenuBar(nil, &theme)

ui/button.go

@@ -7,21 +7,21 @@ import (
 )
 
 type Button struct {
-	Text string
+	Text     string
 	Callback func()
 
-	x, y int
+	x, y          int
 	width, height int
-	focused bool
+	focused       bool
 
 	Theme *Theme
 }
 
 func NewButton(text string, theme *Theme, callback func()) *Button {
 	return &Button{
-		Text: text,
+		Text:     text,
 		Callback: callback,
-		Theme: theme,
+		Theme:    theme,
 	}
 }
 

ui/container.go

@@ -160,7 +160,7 @@ func (c *TabContainer) Draw(s tcell.Screen) {
 	for _, tab := range c.children {
 		combinedTabLength += len(tab.Name) + 2 // 2 for padding
 	}
-	combinedTabLength += len(c.children)-1 // add for spacing between tabs
+	combinedTabLength += len(c.children) - 1 // add for spacing between tabs
 
 	// Draw tabs
 	col := c.x + c.width/2 - combinedTabLength/2 // Starting column
@@ -239,10 +239,10 @@ func (c *TabContainer) HandleEvent(event tcell.Event) bool {
 				if c.Selected >= len(c.children) {
 					c.Selected = 0
 				}
-			} else if ev.Modifiers() == tcell.ModCtrl & tcell.ModShift { // Ctrl + Shift + Tab was pressed
+			} else if ev.Modifiers() == tcell.ModCtrl&tcell.ModShift { // Ctrl + Shift + Tab was pressed
 				c.Selected--
 				if c.Selected < 0 {
-					c.Selected = len(c.children)-1
+					c.Selected = len(c.children) - 1
 				}
 			}
 		}
@@ -281,7 +281,7 @@ func (w *WindowContainer) Draw(s tcell.Screen) {
 	headerStyle := w.Theme.GetOrDefault("WindowHeader")
 
 	DrawRect(s, w.x, w.y, w.width, 1, ' ', headerStyle)                               // Draw header
-	DrawStr(s, w.x+w.width/2 - len(w.Title)/2, w.y, w.Title, headerStyle)                 // Draw title
+	DrawStr(s, w.x+w.width/2-len(w.Title)/2, w.y, w.Title, headerStyle)               // Draw title
 	DrawRect(s, w.x, w.y+1, w.width, w.height-1, ' ', w.Theme.GetOrDefault("Window")) // Draw body background
 
 	if w.Child != nil {

ui/fileselectordialog.go

@@ -11,15 +11,15 @@ import (
 type FileSelectorDialog struct {
 	MustExist           bool           // Whether the dialog should have a user select an existing file.
 	FilesChosenCallback func([]string) // Returns slice of filenames selected. nil if user canceled.
-	CancelCallback      func() // Called when the dialog has been canceled by the user
+	CancelCallback      func()         // Called when the dialog has been canceled by the user
 
 	container     *WindowContainer
 	x, y          int
 	width, height int
 	focused       bool
 
-	tabOrder         []Component
-	tabOrderIdx      int
+	tabOrder    []Component
+	tabOrderIdx int
 
 	inputField    *InputField
 	confirmButton *Button
@@ -87,7 +87,7 @@ func (d *FileSelectorDialog) GetPos() (int, int) {
 func (d *FileSelectorDialog) SetPos(x, y int) {
 	d.x, d.y = x, y
 	d.container.SetPos(x, y)
-	d.inputField.SetPos(d.x+1, d.y+2) // Center input field
+	d.inputField.SetPos(d.x+1, d.y+2)   // Center input field
 	d.cancelButton.SetPos(d.x+1, d.y+4) // Place "Cancel" button on left, bottom
 }
 

ui/inputfield.go

@@ -18,9 +18,9 @@ type InputField struct {
 
 func NewInputField(screen *tcell.Screen, placeholder string, theme *Theme) *InputField {
 	return &InputField{
-		Text:  placeholder,
+		Text:   placeholder,
 		screen: screen,
-		Theme: theme,
+		Theme:  theme,
 	}
 }
 
@@ -40,7 +40,7 @@ func (f *InputField) SetCursorPos(offset int) {
 
 	// Scrolling
 	if offset >= f.scrollPos+f.width-2 { // If cursor position is out of view to the right...
-		f.scrollPos = offset - f.width+2 // Scroll just enough to view that column
+		f.scrollPos = offset - f.width + 2 // Scroll just enough to view that column
 	} else if offset < f.scrollPos { // If cursor position is out of view to the left...
 		f.scrollPos = offset
 	}
@@ -53,7 +53,7 @@ func (f *InputField) SetCursorPos(offset int) {
 
 func (f *InputField) Delete(forward bool) {
 	if forward {
-		//if f.cursorPos 
+		//if f.cursorPos
 	} else {
 
 	}

ui/menu.go

@@ -178,8 +178,8 @@ func (b *MenuBar) HandleEvent(event tcell.Event) bool {
 
 // A Menu contains one or more ItemEntry or ItemMenus.
 type Menu struct {
-	Name          string
-	Items         []Item
+	Name  string
+	Items []Item
 
 	x, y          int
 	width, height int // Size may not be settable
@@ -205,7 +205,7 @@ func NewMenu(name string, theme *Theme, items []Item) Menu {
 func (m *Menu) Draw(s tcell.Screen) {
 	defaultStyle := m.Theme.GetOrDefault("Menu")
 
-	m.GetSize()                                                     // Call this to update internal width and height
+	m.GetSize()                                                          // Call this to update internal width and height
 	DrawRect(s, m.x, m.y, m.width, m.height, ' ', defaultStyle)          // Fill background
 	DrawRectOutlineDefault(s, m.x, m.y, m.width, m.height, defaultStyle) // Draw outline
 

ui/textedit.go

@@ -13,11 +13,11 @@ import (
 // tools, is autocomplete ready, and contains the various information about
 // content being edited.
 type TextEdit struct {
-	LineNumbers bool // Whether to render line numbers (and therefore the column)
-	Dirty       bool // Whether the buffer has been edited
-	UseHardTabs bool // When true, tabs are '\t'
-	TabSize     int  // How many spaces to indent by
-	IsCRLF      bool // Whether the file's line endings are CRLF (\r\n) or LF (\n)
+	LineNumbers bool   // Whether to render line numbers (and therefore the column)
+	Dirty       bool   // Whether the buffer has been edited
+	UseHardTabs bool   // When true, tabs are '\t'
+	TabSize     int    // How many spaces to indent by
+	IsCRLF      bool   // Whether the file's line endings are CRLF (\r\n) or LF (\n)
 	FilePath    string // Will be empty if the file has not been saved yet
 
 	buffer           []string      // TODO: replace line-based buffer with gap buffer

ui/theme.go

@@ -19,7 +19,7 @@ func (theme *Theme) GetOrDefault(key string) tcell.Style {
 			return val
 		}
 	}
-	
+
 	if val, ok := DefaultTheme[key]; ok {
 		return val
 	} else {