Support building and moving patches

WIP

pkg/gui/patch_options_panel.go

@@ -0,0 +1,89 @@
+package gui
+
+import (
+	"fmt"
+
+	"github.com/jesseduffield/gocui"
+)
+
+type patchMenuOption struct {
+	displayName string
+	function    func() error
+}
+
+// GetDisplayStrings is a function.
+func (o *patchMenuOption) GetDisplayStrings(isFocused bool) []string {
+	return []string{o.displayName}
+}
+
+func (gui *Gui) handleCreatePatchOptionsMenu(g *gocui.Gui, v *gocui.View) error {
+	m := gui.State.PatchManager
+	if m == nil {
+		return gui.createErrorPanel(gui.g, gui.Tr.SLocalize("NoPatchError"))
+	}
+
+	options := []*patchMenuOption{
+		{displayName: "discard patch", function: gui.handleDeletePatchFromCommit},
+		{displayName: "pull patch out into index", function: gui.handlePullPatchIntoWorkingTree},
+		{displayName: "save patch to file"},
+		{displayName: "clear patch", function: gui.handleClearPatch},
+	}
+
+	selectedCommit := gui.getSelectedCommit(gui.g)
+	if selectedCommit != nil && gui.State.PatchManager.CommitSha != selectedCommit.Sha {
+		options = append(options, &patchMenuOption{
+			displayName: fmt.Sprintf("move patch to selected commit (%s)", selectedCommit.Sha),
+			function:    gui.handleMovePatchToSelectedCommit,
+		})
+	}
+
+	handleMenuPress := func(index int) error {
+		return options[index].function()
+	}
+
+	return gui.createMenu(gui.Tr.SLocalize("PatchOptionsTitle"), options, len(options), handleMenuPress)
+}
+
+func (gui *Gui) getPatchCommitIndex() int {
+	for index, commit := range gui.State.Commits {
+		if commit.Sha == gui.State.PatchManager.CommitSha {
+			return index
+		}
+	}
+	return -1
+}
+
+func (gui *Gui) handleDeletePatchFromCommit() error {
+	// TODO: deal with when we're already rebasing
+
+	return gui.WithWaitingStatus(gui.Tr.SLocalize("RebasingStatus"), func() error {
+		commitIndex := gui.getPatchCommitIndex()
+		err := gui.GitCommand.DeletePatchesFromCommit(gui.State.Commits, commitIndex, gui.State.PatchManager)
+		return gui.handleGenericMergeCommandResult(err)
+	})
+}
+
+func (gui *Gui) handleMovePatchToSelectedCommit() error {
+	// TODO: deal with when we're already rebasing
+
+	return gui.WithWaitingStatus(gui.Tr.SLocalize("RebasingStatus"), func() error {
+		commitIndex := gui.getPatchCommitIndex()
+		err := gui.GitCommand.MovePatchToSelectedCommit(gui.State.Commits, commitIndex, gui.State.Panels.Commits.SelectedLine, gui.State.PatchManager)
+		return gui.handleGenericMergeCommandResult(err)
+	})
+}
+
+func (gui *Gui) handlePullPatchIntoWorkingTree() error {
+	// TODO: deal with when we're already rebasing
+
+	return gui.WithWaitingStatus(gui.Tr.SLocalize("RebasingStatus"), func() error {
+		commitIndex := gui.getPatchCommitIndex()
+		err := gui.GitCommand.PullPatchIntoIndex(gui.State.Commits, commitIndex, gui.State.PatchManager)
+		return gui.handleGenericMergeCommandResult(err)
+	})
+}
+
+func (gui *Gui) handleClearPatch() error {
+	gui.State.PatchManager = nil
+	return gui.refreshCommitFilesView()
+}