Add change-pointer and transform-pointer

Close #4178

3 files changed, 69 insertions, 46 deletions

diff --git a/src/actiontype_string.go b/src/actiontype_string.go
index ce388e38..19b5ea72 100644
--- a/src/actiontype_string.go
+++ b/src/actiontype_string.go
@@ -99,54 +99,56 @@ func _() {
 	_ = x[actTransformHeader-88]
 	_ = x[actTransformHeaderLabel-89]
 	_ = x[actTransformNth-90]
-	_ = x[actTransformPreviewLabel-91]
-	_ = x[actTransformPrompt-92]
-	_ = x[actTransformQuery-93]
-	_ = x[actTransformSearch-94]
-	_ = x[actSearch-95]
-	_ = x[actPreview-96]
-	_ = x[actChangePreview-97]
-	_ = x[actChangePreviewWindow-98]
-	_ = x[actPreviewTop-99]
-	_ = x[actPreviewBottom-100]
-	_ = x[actPreviewUp-101]
-	_ = x[actPreviewDown-102]
-	_ = x[actPreviewPageUp-103]
-	_ = x[actPreviewPageDown-104]
-	_ = x[actPreviewHalfPageUp-105]
-	_ = x[actPreviewHalfPageDown-106]
-	_ = x[actPrevHistory-107]
-	_ = x[actPrevSelected-108]
-	_ = x[actPrint-109]
-	_ = x[actPut-110]
-	_ = x[actNextHistory-111]
-	_ = x[actNextSelected-112]
-	_ = x[actExecute-113]
-	_ = x[actExecuteSilent-114]
-	_ = x[actExecuteMulti-115]
-	_ = x[actSigStop-116]
-	_ = x[actFirst-117]
-	_ = x[actLast-118]
-	_ = x[actReload-119]
-	_ = x[actReloadSync-120]
-	_ = x[actDisableSearch-121]
-	_ = x[actEnableSearch-122]
-	_ = x[actSelect-123]
-	_ = x[actDeselect-124]
-	_ = x[actUnbind-125]
-	_ = x[actRebind-126]
-	_ = x[actToggleBind-127]
-	_ = x[actBecome-128]
-	_ = x[actShowHeader-129]
-	_ = x[actHideHeader-130]
-	_ = x[actBell-131]
-	_ = x[actExclude-132]
-	_ = x[actExcludeMulti-133]
+	_ = x[actTransformPointer-91]
+	_ = x[actTransformPreviewLabel-92]
+	_ = x[actTransformPrompt-93]
+	_ = x[actTransformQuery-94]
+	_ = x[actTransformSearch-95]
+	_ = x[actSearch-96]
+	_ = x[actPreview-97]
+	_ = x[actChangePointer-98]
+	_ = x[actChangePreview-99]
+	_ = x[actChangePreviewWindow-100]
+	_ = x[actPreviewTop-101]
+	_ = x[actPreviewBottom-102]
+	_ = x[actPreviewUp-103]
+	_ = x[actPreviewDown-104]
+	_ = x[actPreviewPageUp-105]
+	_ = x[actPreviewPageDown-106]
+	_ = x[actPreviewHalfPageUp-107]
+	_ = x[actPreviewHalfPageDown-108]
+	_ = x[actPrevHistory-109]
+	_ = x[actPrevSelected-110]
+	_ = x[actPrint-111]
+	_ = x[actPut-112]
+	_ = x[actNextHistory-113]
+	_ = x[actNextSelected-114]
+	_ = x[actExecute-115]
+	_ = x[actExecuteSilent-116]
+	_ = x[actExecuteMulti-117]
+	_ = x[actSigStop-118]
+	_ = x[actFirst-119]
+	_ = x[actLast-120]
+	_ = x[actReload-121]
+	_ = x[actReloadSync-122]
+	_ = x[actDisableSearch-123]
+	_ = x[actEnableSearch-124]
+	_ = x[actSelect-125]
+	_ = x[actDeselect-126]
+	_ = x[actUnbind-127]
+	_ = x[actRebind-128]
+	_ = x[actToggleBind-129]
+	_ = x[actBecome-130]
+	_ = x[actShowHeader-131]
+	_ = x[actHideHeader-132]
+	_ = x[actBell-133]
+	_ = x[actExclude-134]
+	_ = x[actExcludeMulti-135]
 }
 
-const _actionType_name = "actIgnoreactStartactClickactInvalidactBracketedPasteBeginactBracketedPasteEndactCharactMouseactBeginningOfLineactAbortactAcceptactAcceptNonEmptyactAcceptOrPrintQueryactBackwardCharactBackwardDeleteCharactBackwardDeleteCharEofactBackwardWordactCancelactChangeBorderLabelactChangeListLabelactChangeInputLabelactChangeHeaderactChangeHeaderLabelactChangeMultiactChangePreviewLabelactChangePromptactChangeQueryactChangeNthactClearScreenactClearQueryactClearSelectionactCloseactDeleteCharactDeleteCharEofactEndOfLineactFatalactForwardCharactForwardWordactKillLineactKillWordactUnixLineDiscardactUnixWordRuboutactYankactBackwardKillWordactSelectAllactDeselectAllactToggleactToggleSearchactToggleAllactToggleDownactToggleUpactToggleInactToggleOutactToggleTrackactToggleTrackCurrentactToggleHeaderactToggleWrapactToggleMultiLineactToggleHscrollactTrackCurrentactToggleInputactHideInputactShowInputactUntrackCurrentactDownactUpactPageUpactPageDownactPositionactHalfPageUpactHalfPageDownactOffsetUpactOffsetDownactOffsetMiddleactJumpactJumpAcceptactPrintQueryactRefreshPreviewactReplaceQueryactToggleSortactShowPreviewactHidePreviewactTogglePreviewactTogglePreviewWrapactTransformactTransformBorderLabelactTransformListLabelactTransformInputLabelactTransformHeaderactTransformHeaderLabelactTransformNthactTransformPreviewLabelactTransformPromptactTransformQueryactTransformSearchactSearchactPreviewactChangePreviewactChangePreviewWindowactPreviewTopactPreviewBottomactPreviewUpactPreviewDownactPreviewPageUpactPreviewPageDownactPreviewHalfPageUpactPreviewHalfPageDownactPrevHistoryactPrevSelectedactPrintactPutactNextHistoryactNextSelectedactExecuteactExecuteSilentactExecuteMultiactSigStopactFirstactLastactReloadactReloadSyncactDisableSearchactEnableSearchactSelectactDeselectactUnbindactRebindactToggleBindactBecomeactShowHeaderactHideHeaderactBellactExcludeactExcludeMulti"
+const _actionType_name = "actIgnoreactStartactClickactInvalidactBracketedPasteBeginactBracketedPasteEndactCharactMouseactBeginningOfLineactAbortactAcceptactAcceptNonEmptyactAcceptOrPrintQueryactBackwardCharactBackwardDeleteCharactBackwardDeleteCharEofactBackwardWordactCancelactChangeBorderLabelactChangeListLabelactChangeInputLabelactChangeHeaderactChangeHeaderLabelactChangeMultiactChangePreviewLabelactChangePromptactChangeQueryactChangeNthactClearScreenactClearQueryactClearSelectionactCloseactDeleteCharactDeleteCharEofactEndOfLineactFatalactForwardCharactForwardWordactKillLineactKillWordactUnixLineDiscardactUnixWordRuboutactYankactBackwardKillWordactSelectAllactDeselectAllactToggleactToggleSearchactToggleAllactToggleDownactToggleUpactToggleInactToggleOutactToggleTrackactToggleTrackCurrentactToggleHeaderactToggleWrapactToggleMultiLineactToggleHscrollactTrackCurrentactToggleInputactHideInputactShowInputactUntrackCurrentactDownactUpactPageUpactPageDownactPositionactHalfPageUpactHalfPageDownactOffsetUpactOffsetDownactOffsetMiddleactJumpactJumpAcceptactPrintQueryactRefreshPreviewactReplaceQueryactToggleSortactShowPreviewactHidePreviewactTogglePreviewactTogglePreviewWrapactTransformactTransformBorderLabelactTransformListLabelactTransformInputLabelactTransformHeaderactTransformHeaderLabelactTransformNthactTransformPointeractTransformPreviewLabelactTransformPromptactTransformQueryactTransformSearchactSearchactPreviewactChangePointeractChangePreviewactChangePreviewWindowactPreviewTopactPreviewBottomactPreviewUpactPreviewDownactPreviewPageUpactPreviewPageDownactPreviewHalfPageUpactPreviewHalfPageDownactPrevHistoryactPrevSelectedactPrintactPutactNextHistoryactNextSelectedactExecuteactExecuteSilentactExecuteMultiactSigStopactFirstactLastactReloadactReloadSyncactDisableSearchactEnableSearchactSelectactDeselectactUnbindactRebindactToggleBindactBecomeactShowHeaderactHideHeaderactBellactExcludeactExcludeMulti"
 
-var _actionType_index = [...]uint16{0, 9, 17, 25, 35, 57, 77, 84, 92, 110, 118, 127, 144, 165, 180, 201, 225, 240, 249, 269, 287, 306, 321, 341, 355, 376, 391, 405, 417, 431, 444, 461, 469, 482, 498, 510, 518, 532, 546, 557, 568, 586, 603, 610, 629, 641, 655, 664, 679, 691, 704, 715, 726, 738, 752, 773, 788, 801, 819, 835, 850, 864, 876, 888, 905, 912, 917, 926, 937, 948, 961, 976, 987, 1000, 1015, 1022, 1035, 1048, 1065, 1080, 1093, 1107, 1121, 1137, 1157, 1169, 1192, 1213, 1235, 1253, 1276, 1291, 1315, 1333, 1350, 1368, 1377, 1387, 1403, 1425, 1438, 1454, 1466, 1480, 1496, 1514, 1534, 1556, 1570, 1585, 1593, 1599, 1613, 1628, 1638, 1654, 1669, 1679, 1687, 1694, 1703, 1716, 1732, 1747, 1756, 1767, 1776, 1785, 1798, 1807, 1820, 1833, 1840, 1850, 1865}
+var _actionType_index = [...]uint16{0, 9, 17, 25, 35, 57, 77, 84, 92, 110, 118, 127, 144, 165, 180, 201, 225, 240, 249, 269, 287, 306, 321, 341, 355, 376, 391, 405, 417, 431, 444, 461, 469, 482, 498, 510, 518, 532, 546, 557, 568, 586, 603, 610, 629, 641, 655, 664, 679, 691, 704, 715, 726, 738, 752, 773, 788, 801, 819, 835, 850, 864, 876, 888, 905, 912, 917, 926, 937, 948, 961, 976, 987, 1000, 1015, 1022, 1035, 1048, 1065, 1080, 1093, 1107, 1121, 1137, 1157, 1169, 1192, 1213, 1235, 1253, 1276, 1291, 1310, 1334, 1352, 1369, 1387, 1396, 1406, 1422, 1438, 1460, 1473, 1489, 1501, 1515, 1531, 1549, 1569, 1591, 1605, 1620, 1628, 1634, 1648, 1663, 1673, 1689, 1704, 1714, 1722, 1729, 1738, 1751, 1767, 1782, 1791, 1802, 1811, 1820, 1833, 1842, 1855, 1868, 1875, 1885, 1900}
 
 func (i actionType) String() string {
 	if i < 0 || i >= actionType(len(_actionType_index)-1) {
diff --git a/src/options.go b/src/options.go
index 1f431c45..80e428e3 100644
--- a/src/options.go
+++ b/src/options.go
@@ -1404,7 +1404,7 @@ const (
 
 func init() {
 	executeRegexp = regexp.MustCompile(
-		`(?si)[:+](become|execute(?:-multi|-silent)?|reload(?:-sync)?|preview|(?:change|transform)-(?:query|prompt|(?:border|list|preview|input|header)-label|header|search|nth)|transform|change-(?:preview-window|preview|multi)|(?:re|un|toggle-)bind|pos|put|print|search)`)
+		`(?si)[:+](become|execute(?:-multi|-silent)?|reload(?:-sync)?|preview|(?:change|transform)-(?:query|prompt|(?:border|list|preview|input|header)-label|header|search|nth|pointer)|transform|change-(?:preview-window|preview|multi)|(?:re|un|toggle-)bind|pos|put|print|search)`)
 	splitRegexp = regexp.MustCompile("[,:]+")
 	actionNameRegexp = regexp.MustCompile("(?i)^[a-z-]+")
 }
@@ -1799,6 +1799,8 @@ func isExecuteAction(str string) actionType {
 		return actChangeInputLabel
 	case "change-header-label":
 		return actChangeHeaderLabel
+	case "change-pointer":
+		return actChangePointer
 	case "change-preview-window":
 		return actChangePreviewWindow
 	case "change-preview":
@@ -1839,6 +1841,8 @@ func isExecuteAction(str string) actionType {
 		return actTransformHeader
 	case "transform-nth":
 		return actTransformNth
+	case "transform-pointer":
+		return actTransformPointer
 	case "transform-prompt":
 		return actTransformPrompt
 	case "transform-query":
diff --git a/src/terminal.go b/src/terminal.go
index cd8d4924..ec6e5d9b 100644
--- a/src/terminal.go
+++ b/src/terminal.go
@@ -547,12 +547,14 @@ const (
 	actTransformHeader
 	actTransformHeaderLabel
 	actTransformNth
+	actTransformPointer
 	actTransformPreviewLabel
 	actTransformPrompt
 	actTransformQuery
 	actTransformSearch
 	actSearch
 	actPreview
+	actChangePointer
 	actChangePreview
 	actChangePreviewWindow
 	actPreviewTop
@@ -5951,6 +5953,21 @@ func (t *Terminal) Loop() error {
 						}
 					}
 				}
+			case actChangePointer, actTransformPointer:
+				pointer := a.a
+				if a.t == actTransformPointer {
+					pointer = t.captureLine(a.a)
+				}
+				length := uniseg.StringWidth(pointer)
+				if length <= 2 {
+					if length != t.pointerLen {
+						t.forceRerenderList()
+					}
+					t.pointer = pointer
+					t.pointerLen = length
+					t.pointerEmpty = strings.Repeat(" ", t.pointerLen)
+					req(reqList)
+				}
 			case actChangePreview:
 				if t.previewOpts.command != a.a {
 					t.previewOpts.command = a.a