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package gui
import (
"errors"
"io/ioutil"
"github.com/davecgh/go-spew/spew"
"github.com/jesseduffield/gocui"
"github.com/jesseduffield/lazygit/pkg/git"
)
func (gui *Gui) refreshStagingPanel() error {
// get the currently selected file. Get the diff of that file directly, not
// using any custom diff tools.
// parse the file to find out where the chunks and unstaged changes are
file, err := gui.getSelectedFile(gui.g)
if err != nil {
if err != gui.Errors.ErrNoFiles {
return err
}
return gui.handleStagingEscape(gui.g, nil)
}
if !file.HasUnstagedChanges {
return gui.handleStagingEscape(gui.g, nil)
}
// note for custom diffs, we'll need to send a flag here saying not to use the custom diff
diff := gui.GitCommand.Diff(file, true)
colorDiff := gui.GitCommand.Diff(file, false)
gui.Log.WithField("staging", "staging").Info("DIFF IS:")
gui.Log.WithField("staging", "staging").Info(spew.Sdump(diff))
gui.Log.WithField("staging", "staging").Info("hello")
if len(diff) < 2 {
return gui.handleStagingEscape(gui.g, nil)
}
// parse the diff and store the line numbers of hunks and stageable lines
// TODO: maybe instantiate this at application start
p, err := git.NewPatchParser(gui.Log)
if err != nil {
return nil
}
hunkStarts, stageableLines, err := p.ParsePatch(diff)
if err != nil {
return nil
}
var currentLineIndex int
if gui.State.StagingState != nil {
end := len(stageableLines) - 1
if end < gui.State.StagingState.CurrentLineIndex {
currentLineIndex = end
} else {
currentLineIndex = gui.State.StagingState.CurrentLineIndex
}
} else {
currentLineIndex = 0
}
gui.State.StagingState = &stagingState{
StageableLines: stageableLines,
HunkStarts: hunkStarts,
CurrentLineIndex: currentLineIndex,
Diff: diff,
}
if len(stageableLines) == 0 {
return errors.New("No lines to stage")
}
stagingView := gui.getStagingView(gui.g)
stagingView.SetCursor(0, stageableLines[currentLineIndex])
stagingView.SetOrigin(0, 0)
return gui.renderString(gui.g, "staging", colorDiff)
}
func (gui *Gui) handleStagingEscape(g *gocui.Gui, v *gocui.View) error {
if _, err := gui.g.SetViewOnBottom("staging"); err != nil {
return err
}
return gui.switchFocus(gui.g, nil, gui.getFilesView(gui.g))
}
// nextNumber returns the next index, cycling if we reach the end
func nextIndex(numbers []int, currentNumber int) int {
for index, number := range numbers {
if number > currentNumber {
return index
}
}
return 0
}
// prevNumber returns the next number, cycling if we reach the end
func prevIndex(numbers []int, currentNumber int) int {
end := len(numbers) - 1
for i := end; i >= 0; i -= 1 {
if numbers[i] < currentNumber {
return i
}
}
return end
}
func (gui *Gui) handleStagingKeyUp(g *gocui.Gui, v *gocui.View) error {
return gui.handleCycleLine(true)
}
func (gui *Gui) handleStagingKeyDown(g *gocui.Gui, v *gocui.View) error {
return gui.handleCycleLine(false)
}
func (gui *Gui) handleCycleLine(up bool) error {
state := gui.State.StagingState
lineNumbers := state.StageableLines
currentLine := lineNumbers[state.CurrentLineIndex]
var newIndex int
if up {
newIndex = prevIndex(lineNumbers, currentLine)
} else {
newIndex = nextIndex(lineNumbers, currentLine)
}
state.CurrentLineIndex = newIndex
stagingView := gui.getStagingView(gui.g)
stagingView.SetCursor(0, lineNumbers[newIndex])
stagingView.SetOrigin(0, 0)
return nil
}
func (gui *Gui) handleStageLine(g *gocui.Gui, v *gocui.View) error {
state := gui.State.StagingState
p, err := git.NewPatchModifier(gui.Log)
if err != nil {
return err
}
currentLine := state.StageableLines[state.CurrentLineIndex]
patch, err := p.ModifyPatch(state.Diff, currentLine)
if err != nil {
return err
}
// for logging purposes
ioutil.WriteFile("patch.diff", []byte(patch), 0600)
// apply the patch then refresh this panel
// create a new temp file with the patch, then call git apply with that patch
_, err = gui.GitCommand.ApplyPatch(patch)
if err != nil {
panic(err)
}
gui.refreshStagingPanel()
gui.refreshFiles(gui.g)
return nil
}
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