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package gui
import (
"fmt"
"github.com/go-errors/errors"
"github.com/jesseduffield/gocui"
"github.com/jesseduffield/lazygit/pkg/commands/patch"
"github.com/jesseduffield/lazygit/pkg/gui/lbl"
)
// Currently there are two 'pseudo-panels' that make use of this 'pseudo-panel'.
// One is the staging panel where we stage files line-by-line, the other is the
// patch building panel where we add lines of an old commit's file to a patch.
// This file contains the logic around selecting lines and displaying the diffs
// staging_panel.go and patch_building_panel.go have functions specific to their
// use cases
// returns whether the patch is empty so caller can escape if necessary
// both diffs should be non-coloured because we'll parse them and colour them here
func (gui *Gui) refreshLineByLinePanel(diff string, secondaryDiff string, secondaryFocused bool, selectedLineIdx int) (bool, error) {
gui.splitMainPanel(true)
var oldState *lbl.State
if gui.State.Panels.LineByLine != nil {
oldState = gui.State.Panels.LineByLine.State
}
state := lbl.NewState(diff, selectedLineIdx, oldState, gui.Log)
if state == nil {
return true, nil
}
gui.State.Panels.LineByLine = &LblPanelState{
State: state,
SecondaryFocused: secondaryFocused,
}
if err := gui.refreshMainViewForLineByLine(gui.State.Panels.LineByLine); err != nil {
return false, err
}
if err := gui.focusSelection(gui.State.Panels.LineByLine); err != nil {
return false, err
}
gui.Views.Secondary.Highlight = true
gui.Views.Secondary.Wrap = false
secondaryPatchParser := patch.NewPatchParser(gui.Log, secondaryDiff)
gui.setViewContent(gui.Views.Secondary, secondaryPatchParser.Render(-1, -1, nil))
return false, nil
}
func (gui *Gui) handleSelectPrevLine() error {
return gui.withLBLActiveCheck(func(state *LblPanelState) error {
state.CycleSelection(false)
return gui.refreshAndFocusLblPanel(state)
})
}
func (gui *Gui) handleSelectNextLine() error {
return gui.withLBLActiveCheck(func(state *LblPanelState) error {
state.CycleSelection(true)
return gui.refreshAndFocusLblPanel(state)
})
}
func (gui *Gui) handleSelectPrevHunk() error {
return gui.withLBLActiveCheck(func(state *LblPanelState) error {
state.CycleHunk(false)
return gui.refreshAndFocusLblPanel(state)
})
}
func (gui *Gui) handleSelectNextHunk() error {
return gui.withLBLActiveCheck(func(state *LblPanelState) error {
state.CycleHunk(true)
return gui.refreshAndFocusLblPanel(state)
})
}
func (gui *Gui) refreshAndFocusLblPanel(state *LblPanelState) error {
if err := gui.refreshMainViewForLineByLine(state); err != nil {
return err
}
return gui.focusSelection(state)
}
func (gui *Gui) handleLBLMouseDown() error {
return gui.withLBLActiveCheck(func(state *LblPanelState) error {
if gui.popupPanelFocused() {
return nil
}
state.SelectNewLineForRange(gui.Views.Main.SelectedLineIdx())
return gui.refreshAndFocusLblPanel(state)
})
}
func (gui *Gui) handleMouseDrag() error {
return gui.withLBLActiveCheck(func(state *LblPanelState) error {
if gui.popupPanelFocused() {
return nil
}
state.SelectLine(gui.Views.Main.SelectedLineIdx())
return gui.refreshAndFocusLblPanel(state)
})
}
func (gui *Gui) getSelectedCommitFileName() string {
idx := gui.State.Panels.CommitFiles.SelectedLineIdx
return gui.State.CommitFileManager.GetItemAtIndex(idx).GetPath()
}
func (gui *Gui) refreshMainViewForLineByLine(state *LblPanelState) error {
var includedLineIndices []int
// I'd prefer not to have knowledge of contexts using this file but I'm not sure
// how to get around this
if gui.currentContext().GetKey() == gui.State.Contexts.PatchBuilding.GetKey() {
filename := gui.getSelectedCommitFileName()
var err error
includedLineIndices, err = gui.GitCommand.PatchManager.GetFileIncLineIndices(filename)
if err != nil {
return err
}
}
colorDiff := state.RenderForLineIndices(includedLineIndices)
gui.Views.Main.Highlight = true
gui.Views.Main.Wrap = false
gui.setViewContent(gui.Views.Main, colorDiff)
return nil
}
// focusSelection works out the best focus for the staging panel given the
// selected line and size of the hunk
func (gui *Gui) focusSelection(state *LblPanelState) error {
stagingView := gui.Views.Main
_, viewHeight := stagingView.Size()
bufferHeight := viewHeight - 1
_, origin := stagingView.Origin()
firstLineIdx, lastLineIdx := state.SelectedRange()
margin := 0 // we may want to have a margin in place to show context but right now I'm thinking we keep this at zero
var newOrigin int
if firstLineIdx-origin < margin {
newOrigin = firstLineIdx - margin
} else if lastLineIdx-origin > bufferHeight-margin {
newOrigin = lastLineIdx - bufferHeight + margin
} else {
newOrigin = origin
}
gui.g.Update(func(*gocui.Gui) error {
if err := stagingView.SetOrigin(0, newOrigin); err != nil {
return err
}
return stagingView.SetCursor(0, state.GetSelectedLineIdx()-newOrigin)
})
return nil
}
func (gui *Gui) handleToggleSelectRange() error {
return gui.withLBLActiveCheck(func(state *LblPanelState) error {
state.ToggleSelectRange()
return gui.refreshMainViewForLineByLine(state)
})
}
func (gui *Gui) handleToggleSelectHunk() error {
return gui.withLBLActiveCheck(func(state *LblPanelState) error {
state.ToggleSelectHunk()
return gui.refreshAndFocusLblPanel(state)
})
}
func (gui *Gui) escapeLineByLinePanel() {
gui.State.Panels.LineByLine = nil
}
func (gui *Gui) handleOpenFileAtLine() error {
return gui.withLBLActiveCheck(func(state *LblPanelState) error {
// again, would be good to use inheritance here (or maybe even composition)
var filename string
switch gui.State.MainContext {
case gui.State.Contexts.PatchBuilding.GetKey():
filename = gui.getSelectedCommitFileName()
case gui.State.Contexts.Staging.GetKey():
file := gui.getSelectedFile()
if file == nil {
return nil
}
filename = file.Name
default:
return errors.Errorf("unknown main context: %s", gui.State.MainContext)
}
// need to look at current index, then work out what my hunk's header information is, and see how far my line is away from the hunk header
lineNumber := state.CurrentLineNumber()
filenameWithLineNum := fmt.Sprintf("%s:%d", filename, lineNumber)
if err := gui.OSCommand.OpenFile(filenameWithLineNum); err != nil {
return err
}
return nil
})
}
func (gui *Gui) handleLineByLineNextPage() error {
return gui.withLBLActiveCheck(func(state *LblPanelState) error {
state.SetLineSelectMode()
state.AdjustSelectedLineIdx(gui.pageDelta(gui.Views.Main))
return gui.refreshAndFocusLblPanel(state)
})
}
func (gui *Gui) handleLineByLinePrevPage() error {
return gui.withLBLActiveCheck(
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