refactor to no longer call these things file changes

pkg/gui/filetree/commit_file_manager.go

@@ -0,0 +1,114 @@
+package filetree
+
+import (
+	"github.com/jesseduffield/lazygit/pkg/commands/models"
+	"github.com/jesseduffield/lazygit/pkg/commands/patch"
+	"github.com/jesseduffield/lazygit/pkg/gui/presentation"
+	"github.com/sirupsen/logrus"
+)
+
+type CommitFileManager struct {
+	files          []*models.CommitFile
+	tree           *CommitFileNode
+	showTree       bool
+	log            *logrus.Entry
+	collapsedPaths CollapsedPaths
+	// parent is the identifier of the parent object e.g. a commit SHA if this commit file is for a commit, or a stash entry ref like 'stash@{1}'
+	parent string
+}
+
+func (m *CommitFileManager) GetParent() string {
+	return m.parent
+}
+
+func NewCommitFileManager(files []*models.CommitFile, log *logrus.Entry, showTree bool) *CommitFileManager {
+	return &CommitFileManager{
+		files:          files,
+		log:            log,
+		showTree:       showTree,
+		collapsedPaths: CollapsedPaths{},
+	}
+}
+
+func (m *CommitFileManager) ExpandToPath(path string) {
+	m.collapsedPaths.ExpandToPath(path)
+}
+
+func (m *CommitFileManager) ToggleShowTree() {
+	m.showTree = !m.showTree
+	m.SetTree()
+}
+
+func (m *CommitFileManager) GetItemAtIndex(index int) *CommitFileNode {
+	// need to traverse the three depth first until we get to the index.
+	return m.tree.GetNodeAtIndex(index+1, m.collapsedPaths) // ignoring root
+}
+
+func (m *CommitFileManager) GetIndexForPath(path string) (int, bool) {
+	index, found := m.tree.GetIndexForPath(path, m.collapsedPaths)
+	return index - 1, found
+}
+
+func (m *CommitFileManager) GetAllItems() []*CommitFileNode {
+	if m.tree == nil {
+		return nil
+	}
+
+	return m.tree.Flatten(m.collapsedPaths)[1:] // ignoring root
+}
+
+func (m *CommitFileManager) GetItemsLength() int {
+	return m.tree.Size(m.collapsedPaths) - 1 // ignoring root
+}
+
+func (m *CommitFileManager) GetAllFiles() []*models.CommitFile {
+	return m.files
+}
+
+func (m *CommitFileManager) SetFiles(files []*models.CommitFile, parent string) {
+	m.files = files
+	m.parent = parent
+
+	m.SetTree()
+}
+
+func (m *CommitFileManager) SetTree() {
+	if m.showTree {
+		m.tree = BuildTreeFromCommitFiles(m.files)
+	} else {
+		m.tree = BuildFlatTreeFromCommitFiles(m.files)
+	}
+}
+
+func (m *CommitFileManager) IsCollapsed(path string) bool {
+	return m.collapsedPaths.IsCollapsed(path)
+}
+
+func (m *CommitFileManager) ToggleCollapsed(path string) {
+	m.collapsedPaths.ToggleCollapsed(path)
+}
+
+func (m *CommitFileManager) Render(diffName string, patchManager *patch.PatchManager) []string {
+	return renderAux(m.tree, m.collapsedPaths, "", -1, func(n INode, depth int) string {
+		castN := n.(*CommitFileNode)
+
+		// This is a little convoluted because we're dealing with either a leaf or a non-leaf.
+		// But this code actually applies to both. If it's a leaf, the status will just
+		// be whatever status it is, but if it's a non-leaf it will determine its status
+		// based on the leaves of that subtree
+		var status patch.PatchStatus
+		if castN.EveryFile(func(file *models.CommitFile) bool {
+			return patchManager.GetFileStatus(file.Name, m.parent) == patch.WHOLE
+		}) {
+			status = patch.WHOLE
+		} else if castN.EveryFile(func(file *models.CommitFile) bool {
+			return patchManager.GetFileStatus(file.Name, m.parent) == patch.UNSELECTED
+		}) {
+			status = patch.UNSELECTED
+		} else {
+			status = patch.PART
+		}
+
+		return presentation.GetCommitFileLine(castN.NameAtDepth(depth), diffName, castN.File, status)
+	})
+}