refactor contexts

pkg/gui/controllers/list_controller.go

@@ -0,0 +1,144 @@
+package controllers
+
+import (
+	"github.com/jesseduffield/gocui"
+	"github.com/jesseduffield/lazygit/pkg/gui/types"
+)
+
+type ListControllerFactory struct {
+	c *types.ControllerCommon
+}
+
+func NewListControllerFactory(c *types.ControllerCommon) *ListControllerFactory {
+	return &ListControllerFactory{
+		c: c,
+	}
+}
+
+func (self *ListControllerFactory) Create(context types.IListContext) *ListController {
+	return &ListController{
+		baseController: baseController{},
+		c:              self.c,
+		context:        context,
+	}
+}
+
+type ListController struct {
+	baseController
+	c *types.ControllerCommon
+
+	context types.IListContext
+}
+
+func (self *ListController) Context() types.Context {
+	return self.context
+}
+
+func (self *ListController) HandlePrevLine() error {
+	return self.handleLineChange(-1)
+}
+
+func (self *ListController) HandleNextLine() error {
+	return self.handleLineChange(1)
+}
+
+func (self *ListController) HandleScrollLeft() error {
+	return self.scroll(self.context.GetViewTrait().ScrollLeft)
+}
+
+func (self *ListController) HandleScrollRight() error {
+	return self.scroll(self.context.GetViewTrait().ScrollRight)
+}
+
+func (self *ListController) scroll(scrollFunc func()) error {
+	scrollFunc()
+
+	return self.context.HandleFocus()
+}
+
+func (self *ListController) handleLineChange(change int) error {
+	before := self.context.GetList().GetSelectedLineIdx()
+	self.context.GetList().MoveSelectedLine(change)
+	after := self.context.GetList().GetSelectedLineIdx()
+
+	// doing this check so that if we're holding the up key at the start of the list
+	// we're not constantly re-rendering the main view.
+	if before != after {
+		return self.context.HandleFocus()
+	}
+
+	return nil
+}
+
+func (self *ListController) HandlePrevPage() error {
+	return self.handleLineChange(-self.context.GetViewTrait().PageDelta())
+}
+
+func (self *ListController) HandleNextPage() error {
+	return self.handleLineChange(self.context.GetViewTrait().PageDelta())
+}
+
+func (self *ListController) HandleGotoTop() error {
+	return self.handleLineChange(-self.context.GetList().GetItemsLength())
+}
+
+func (self *ListController) HandleGotoBottom() error {
+	return self.handleLineChange(self.context.GetList().GetItemsLength())
+}
+
+func (self *ListController) HandleClick(onClick func() error) error {
+	prevSelectedLineIdx := self.context.GetList().GetSelectedLineIdx()
+	// because we're handling a click, we need to determine the new line idx based
+	// on the view itself.
+	newSelectedLineIdx := self.context.GetViewTrait().SelectedLineIdx()
+
+	currentContextKey := self.c.CurrentContext().GetKey()
+	alreadyFocused := currentContextKey == self.context.GetKey()
+
+	// we need to focus the view
+	if !alreadyFocused {
+		if err := self.c.PushContext(self.context); err != nil {
+			return err
+		}
+	}
+
+	if newSelectedLineIdx > self.context.GetList().GetItemsLength()-1 {
+		return nil
+	}
+
+	self.context.GetList().SetSelectedLineIdx(newSelectedLineIdx)
+
+	if prevSelectedLineIdx == newSelectedLineIdx && alreadyFocused && onClick != nil {
+		return onClick()
+	}
+	return self.context.HandleFocus()
+}
+
+func (self *ListController) GetKeybindings(opts types.KeybindingsOpts) []*types.Binding {
+	return []*types.Binding{
+		{Tag: "navigation", Key: opts.GetKey(opts.Config.Universal.PrevItemAlt), Modifier: gocui.ModNone, Handler: self.HandlePrevLine},
+		{Tag: "navigation", Key: opts.GetKey(opts.Config.Universal.PrevItem), Modifier: gocui.ModNone, Handler: self.HandlePrevLine},
+		{Tag: "navigation", Key: gocui.MouseWheelUp, Modifier: gocui.ModNone, Handler: self.HandlePrevLine},
+		{Tag: "navigation", Key: opts.GetKey(opts.Config.Universal.NextItemAlt), Modifier: gocui.ModNone, Handler: self.HandleNextLine},
+		{Tag: "navigation", Key: opts.GetKey(opts.Config.Universal.NextItem), Modifier: gocui.ModNone, Handler: self.HandleNextLine},
+		{Tag: "navigation", Key: opts.GetKey(opts.Config.Universal.PrevPage), Modifier: gocui.ModNone, Handler: self.HandlePrevPage, Description: self.c.Tr.LcPrevPage},
+		{Tag: "navigation", Key: opts.GetKey(opts.Config.Universal.NextPage), Modifier: gocui.ModNone, Handler: self.HandleNextPage, Description: self.c.Tr.LcNextPage},
+		{Tag: "navigation", Key: opts.GetKey(opts.Config.Universal.GotoTop), Modifier: gocui.ModNone, Handler: self.HandleGotoTop, Description: self.c.Tr.LcGotoTop},
+		{Key: gocui.MouseLeft, Modifier: gocui.ModNone, Handler: func() error { return self.HandleClick(nil) }},
+		{Tag: "navigation", Key: gocui.MouseWheelDown, Modifier: gocui.ModNone, Handler: self.HandleNextLine},
+		{Tag: "navigation", Key: opts.GetKey(opts.Config.Universal.ScrollLeft), Modifier: gocui.ModNone, Handler: self.HandleScrollLeft},
+		{Tag: "navigation", Key: opts.GetKey(opts.Config.Universal.ScrollRight), Modifier: gocui.ModNone, Handler: self.HandleScrollRight},
+		{
+			Key:         opts.GetKey(opts.Config.Universal.StartSearch),
+			Handler:     func() error { self.c.OpenSearch(); return nil },
+			Description: self.c.Tr.LcStartSearch,
+			Tag:         "navigation",
+		},
+		{
+			Key:         opts.GetKey(opts.Config.Universal.GotoBottom),
+			Description: self.c.Tr.LcGotoBottom,
+			Handler:     self.HandleGotoBottom,
+			Tag:         "navigation",
+		},
+	}
+}