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textview.go
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textview.go
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// Copyright (c) 2018, The GoKi Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package giv
import (
"fmt"
"image"
"image/draw"
"log"
"strings"
"sync"
"time"
"unicode"
"github.com/goki/gi/oswin/cursor"
"github.com/chewxy/math32"
"github.com/goki/gi/gi"
"github.com/goki/gi/oswin"
"github.com/goki/gi/oswin/key"
"github.com/goki/gi/oswin/mimedata"
"github.com/goki/gi/oswin/mouse"
"github.com/goki/gi/units"
"github.com/goki/ki/indent"
"github.com/goki/ki/ints"
"github.com/goki/ki/ki"
"github.com/goki/ki/kit"
"github.com/goki/pi/filecat"
"github.com/goki/pi/token"
)
// TextView is a widget for editing multiple lines of text (as compared to
// TextField for a single line). The View is driven by a TextBuf buffer which
// contains all the text, and manages all the edits, sending update signals
// out to the views -- multiple views can be attached to a given buffer. All
// updating in the TextView should be within a single goroutine -- it would
// require extensive protections throughout code otherwise.
type TextView struct {
gi.WidgetBase
Buf *TextBuf `json:"-" xml:"-" desc:"the text buffer that we're editing"`
Placeholder string `json:"-" xml:"placeholder" desc:"text that is displayed when the field is empty, in a lower-contrast manner"`
CursorWidth units.Value `xml:"cursor-width" desc:"width of cursor -- set from cursor-width property (inherited)"`
LineIcons map[int]gi.IconName `desc:"icons for each line -- use SetLineIcon and DeleteLineIcon"`
NLines int `json:"-" xml:"-" desc:"number of lines in the view -- sync'd with the Buf after edits, but always reflects storage size of Renders etc"`
Renders []gi.TextRender `json:"-" xml:"-" desc:"renders of the text lines, with one render per line (each line could visibly wrap-around, so these are logical lines, not display lines)"`
Offs []float32 `json:"-" xml:"-" desc:"starting offsets for top of each line"`
LineNoDigs int `json:"-" xml:"-" desc:"number of line number digits needed"`
LineNoOff float32 `json:"-" xml:"-" desc:"horizontal offset for start of text after line numbers"`
LineNoRender gi.TextRender `json:"-" xml:"-" desc:"render for line numbers"`
LinesSize image.Point `json:"-" xml:"-" desc:"total size of all lines as rendered"`
RenderSz gi.Vec2D `json:"-" xml:"-" desc:"size params to use in render call"`
CursorPos TextPos `json:"-" xml:"-" desc:"current cursor position"`
CursorCol int `json:"-" xml:"-" desc:"desired cursor column -- where the cursor was last when moved using left / right arrows -- used when doing up / down to not always go to short line columns"`
CorrectPos TextPos `json:"_" xml:"-" desc:"cursor position for spelling corrections that are at the end of a line when the real cursor position is now at start of next line"`
PosHistIdx int `json:"-" xml:"-" desc:"current index within PosHistory"`
SelectStart TextPos `json:"-" xml:"-" desc:"starting point for selection -- will either be the start or end of selected region depending on subsequent selection."`
SelectReg TextRegion `json:"-" xml:"-" desc:"current selection region"`
PrevSelectReg TextRegion `json:"-" xml:"-" desc:"previous selection region, that was actually rendered -- needed to update render"`
Highlights []TextRegion `json:"-" xml:"-" desc:"highlighted regions, e.g., for search results"`
Scopelights []TextRegion `json:"-" xml:"-" desc:"highlighted regions, specific to scope markers"`
SelectMode bool `json:"-" xml:"-" desc:"if true, select text as cursor moves"`
ForceComplete bool `json:"-" xml:"-" desc:"if true, complete regardless of any disqualifying reasons"`
ISearch ISearch `json:"-" xml:"-" desc:"interactive search data"`
QReplace QReplace `json:"-" xml:"-" desc:"query replace data"`
TextViewSig ki.Signal `json:"-" xml:"-" view:"-" desc:"signal for text view -- see TextViewSignals for the types"`
LinkSig ki.Signal `json:"-" xml:"-" view:"-" desc:"signal for clicking on a link -- data is a string of the URL -- if nobody receiving this signal, calls TextLinkHandler then URLHandler"`
StateStyles [TextViewStatesN]gi.Style `json:"-" xml:"-" desc:"normal style and focus style"`
FontHeight float32 `json:"-" xml:"-" desc:"font height, cached during styling"`
LineHeight float32 `json:"-" xml:"-" desc:"line height, cached during styling"`
VisSize image.Point `json:"-" xml:"-" desc:"height in lines and width in chars of the visible area"`
BlinkOn bool `json:"-" xml:"-" desc:"oscillates between on and off for blinking"`
CursorMu sync.Mutex `json:"-" xml:"-" view:"-" desc:"mutex protecting cursor rendering -- shared between blink and main code"`
HasLinks bool `json:"-" xml:"-" desc:"at least one of the renders has links -- determines if we set the cursor for hand movements"`
lastRecenter int
lastAutoInsert rune
lastFilename gi.FileName
}
var KiT_TextView = kit.Types.AddType(&TextView{}, TextViewProps)
// AddNewTextView adds a new textview to given parent node, with given name.
func AddNewTextView(parent ki.Ki, name string) *TextView {
return parent.AddNewChild(KiT_TextView, name).(*TextView)
}
func (tv *TextView) Disconnect() {
tv.WidgetBase.Disconnect()
tv.TextViewSig.DisconnectAll()
tv.LinkSig.DisconnectAll()
}
var TextViewProps = ki.Props{
"EnumType:Flag": KiT_TextViewFlags,
"white-space": gi.WhiteSpacePreWrap,
"font-family": "Go Mono",
"border-width": 0, // don't render our own border
"cursor-width": units.NewPx(3),
"border-color": &gi.Prefs.Colors.Border,
"border-style": gi.BorderSolid,
"padding": units.NewPx(2),
"margin": units.NewPx(2),
"vertical-align": gi.AlignTop,
"text-align": gi.AlignLeft,
"tab-size": 4,
"color": &gi.Prefs.Colors.Font,
"background-color": &gi.Prefs.Colors.Background,
TextViewSelectors[TextViewActive]: ki.Props{
"background-color": "highlight-10",
},
TextViewSelectors[TextViewFocus]: ki.Props{
"background-color": "lighter-0",
},
TextViewSelectors[TextViewInactive]: ki.Props{
"background-color": "highlight-20",
},
TextViewSelectors[TextViewSel]: ki.Props{
"background-color": &gi.Prefs.Colors.Select,
},
TextViewSelectors[TextViewHighlight]: ki.Props{
"background-color": &gi.Prefs.Colors.Highlight,
},
}
// TextViewSignals are signals that text view can send
type TextViewSignals int64
const (
// TextViewDone signal indicates return was pressed and an edit was completed -- data is the text
TextViewDone TextViewSignals = iota
// TextViewSelected signal indicates some text was selected (for Inactive state, selection is via WidgetSig)
TextViewSelected
// TextViewCursorMoved signal indicates cursor moved emitted for every cursor movement -- e.g., for displaying cursor pos
TextViewCursorMoved
// TextViewISearch is emitted for every update of interactive search process -- see
// ISearch.* members for current state
TextViewISearch
// TextViewQReplace is emitted for every update of query-replace process -- see
// QReplace.* members for current state
TextViewQReplace
// TextViewSignalsN is the number of TextViewSignals
TextViewSignalsN
)
//go:generate stringer -type=TextViewSignals
// TextViewStates are mutually-exclusive textfield states -- determines appearance
type TextViewStates int32
const (
// TextViewActive is the normal state -- there but not being interacted with
TextViewActive TextViewStates = iota
// TextViewFocus states means textvieww is the focus -- will respond to keyboard input
TextViewFocus
// TextViewInactive means the textview is inactive -- not editable
TextViewInactive
// TextViewSel means the text region is selected
TextViewSel
// TextViewHighlight means the text region is highlighted
TextViewHighlight
// TextViewStatesN is the number of textview states
TextViewStatesN
)
//go:generate stringer -type=TextViewStates
// Style selector names for the different states
var TextViewSelectors = []string{":active", ":focus", ":inactive", ":selected", ":highlight"}
// TextViewFlags extend NodeBase NodeFlags to hold TextView state
type TextViewFlags int
//go:generate stringer -type=TextViewFlags
var KiT_TextViewFlags = kit.Enums.AddEnumExt(gi.KiT_NodeFlags, TextViewFlagsN, true, nil) // true = bitflags
const (
// TextViewNeedsRefresh indicates when refresh is required
TextViewNeedsRefresh TextViewFlags = TextViewFlags(gi.NodeFlagsN) + iota
// TextViewInReLayout indicates that we are currently resizing ourselves via parent layout
TextViewInReLayout
// TextViewRenderScrolls indicates that parent layout scrollbars need to be re-rendered at next rerender
TextViewRenderScrolls
// TextViewFocusActive is set if the keyboard focus is active -- when we lose active focus we apply changes
TextViewFocusActive
// TextViewHasLineNos indicates that this view has line numbers (per TextBuf option)
TextViewHasLineNos
// TextViewLastWasTabAI indicates that last key was a Tab auto-indent
TextViewLastWasTabAI
// TextViewLastWasUndo indicates that last key was an undo
TextViewLastWasUndo
TextViewFlagsN
)
// IsFocusActive returns true if we have active focus for keyboard input
func (tv *TextView) IsFocusActive() bool {
return tv.HasFlag(int(TextViewFocusActive))
}
// Label returns the display label for this node, satisfying the Labeler interface
func (tv *TextView) Label() string {
return tv.Nm
}
// EditDone completes editing and copies the active edited text to the text --
// called when the return key is pressed or goes out of focus
func (tv *TextView) EditDone() {
if tv.Buf != nil {
tv.Buf.EditDone()
}
tv.ClearSelected()
}
// Refresh re-displays everything anew from the buffer
func (tv *TextView) Refresh() {
if tv == nil || tv.This() == nil {
return
}
if !tv.This().(gi.Node2D).IsVisible() {
return
}
tv.LayoutAllLines(false)
tv.RenderAllLines()
tv.ClearNeedsRefresh()
}
// Remarkup triggers a complete re-markup of the entire text --
// can do this when needed if the markup gets off due to multi-line
// formatting issues -- via Recenter key
func (tv *TextView) ReMarkup() {
if tv.Buf == nil {
return
}
tv.Buf.ReMarkup()
}
// NeedsRefresh checks if a refresh is required -- atomically safe for other
// routines to set the NeedsRefresh flag
func (tv *TextView) NeedsRefresh() bool {
return tv.HasFlag(int(TextViewNeedsRefresh))
}
// SetNeedsRefresh flags that a refresh is required -- atomically safe for
// other routines to call this
func (tv *TextView) SetNeedsRefresh() {
tv.SetFlag(int(TextViewNeedsRefresh))
}
// ClearNeedsRefresh clears needs refresh flag -- atomically safe
func (tv *TextView) ClearNeedsRefresh() {
tv.ClearFlag(int(TextViewNeedsRefresh))
}
// RefreshIfNeeded re-displays everything if SetNeedsRefresh was called --
// returns true if refreshed
func (tv *TextView) RefreshIfNeeded() bool {
if tv.NeedsRefresh() {
tv.Refresh()
return true
}
return false
}
// IsChanged returns true if buffer was changed (edited)
func (tv *TextView) IsChanged() bool {
if tv.Buf != nil && tv.Buf.IsChanged() {
return true
}
return false
}
// HasLineNos returns true if view is showing line numbers (per textbuf option, cached here)
func (tv *TextView) HasLineNos() bool {
return tv.HasFlag(int(TextViewHasLineNos))
}
// Clear resets all the text in the buffer for this view
func (tv *TextView) Clear() {
if tv.Buf == nil {
return
}
tv.Buf.New(0)
}
///////////////////////////////////////////////////////////////////////////////
// Buffer communication
// ResetState resets all the random state variables, when opening a new buffer etc
func (tv *TextView) ResetState() {
tv.SelectReset()
tv.Highlights = nil
tv.ISearch.On = false
tv.QReplace.On = false
if tv.Buf == nil || tv.lastFilename != tv.Buf.Filename { // don't reset if reopening..
tv.CursorPos = TextPos{}
}
}
// SetBuf sets the TextBuf that this is a view of, and interconnects their signals
func (tv *TextView) SetBuf(buf *TextBuf) {
if buf != nil && tv.Buf == buf {
return
}
// had := false
if tv.Buf != nil {
// had = true
tv.Buf.DeleteView(tv)
}
tv.Buf = buf
tv.ResetState()
if buf != nil {
buf.AddView(tv)
bhl := len(buf.PosHistory)
if bhl > 0 {
tv.CursorPos = buf.PosHistory[bhl-1]
tv.PosHistIdx = bhl - 1
}
}
tv.LayoutAllLines(false)
tv.SetFullReRender()
tv.UpdateSig()
tv.SetCursorShow(tv.CursorPos)
}
// LinesInserted inserts new lines of text and reformats them
func (tv *TextView) LinesInserted(tbe *TextBufEdit) {
stln := tbe.Reg.Start.Ln + 1
nsz := (tbe.Reg.End.Ln - tbe.Reg.Start.Ln)
// Renders
tmprn := make([]gi.TextRender, nsz)
nrn := append(tv.Renders, tmprn...)
copy(nrn[stln+nsz:], nrn[stln:])
copy(nrn[stln:], tmprn)
tv.Renders = nrn
// Offs
tmpof := make([]float32, nsz)
nof := append(tv.Offs, tmpof...)
copy(nof[stln+nsz:], nof[stln:])
copy(nof[stln:], tmpof)
tv.Offs = nof
tv.NLines += nsz
tv.LayoutLines(tbe.Reg.Start.Ln, tbe.Reg.End.Ln, false)
tv.RenderAllLines()
}
// LinesDeleted deletes lines of text and reformats remaining one
func (tv *TextView) LinesDeleted(tbe *TextBufEdit) {
stln := tbe.Reg.Start.Ln
edln := tbe.Reg.End.Ln
dsz := edln - stln
tv.Renders = append(tv.Renders[:stln], tv.Renders[edln:]...)
tv.Offs = append(tv.Offs[:stln], tv.Offs[edln:]...)
tv.NLines -= dsz
tv.LayoutLines(tbe.Reg.Start.Ln, tbe.Reg.Start.Ln, true)
tv.RenderAllLines()
}
// TextViewBufSigRecv receives a signal from the buffer and updates view accordingly
func TextViewBufSigRecv(rvwki, sbufki ki.Ki, sig int64, data interface{}) {
tv := rvwki.Embed(KiT_TextView).(*TextView)
if !tv.This().(gi.Node2D).IsVisible() {
return
}
switch TextBufSignals(sig) {
case TextBufDone:
case TextBufNew:
tv.ResetState()
tv.Refresh()
tv.SetCursorShow(tv.CursorPos)
case TextBufInsert:
if tv.Renders == nil { // not init yet
return
}
tbe := data.(*TextBufEdit)
// fmt.Printf("tv %v got %v\n", tv.Nm, tbe.Reg.Start)
if tbe.Reg.Start.Ln != tbe.Reg.End.Ln {
// fmt.Printf("tv %v lines insert %v - %v\n", tv.Nm, tbe.Reg.Start, tbe.Reg.End)
tv.LinesInserted(tbe)
} else {
rerend := tv.LayoutLines(tbe.Reg.Start.Ln, tbe.Reg.End.Ln, false)
if rerend {
// fmt.Printf("tv %v line insert rerend %v - %v\n", tv.Nm, tbe.Reg.Start, tbe.Reg.End)
tv.RenderAllLines()
} else {
// fmt.Printf("tv %v line insert no rerend %v - %v\n", tv.Nm, tbe.Reg.Start, tbe.Reg.End)
tv.RenderLines(tbe.Reg.Start.Ln, tbe.Reg.End.Ln)
}
}
case TextBufDelete:
if tv.Renders == nil { // not init yet
return
}
tbe := data.(*TextBufEdit)
if tbe.Reg.Start.Ln != tbe.Reg.End.Ln {
tv.LinesDeleted(tbe)
} else {
rerend := tv.LayoutLines(tbe.Reg.Start.Ln, tbe.Reg.End.Ln, true)
if rerend {
tv.RenderAllLines()
} else {
tv.RenderLines(tbe.Reg.Start.Ln, tbe.Reg.End.Ln)
}
}
case TextBufMarkUpdt:
tv.SetNeedsRefresh() // comes from another goroutine
}
}
///////////////////////////////////////////////////////////////////////////////
// Text formatting and rendering
// ParentLayout returns our parent layout -- we ensure this is our immediate parent which is necessary
// for textview
func (tv *TextView) ParentLayout() *gi.Layout {
if tv.Par == nil {
return nil
}
pari, _ := gi.KiToNode2D(tv.Par)
return pari.AsLayout2D()
}
// RenderSize is the size we should pass to text rendering, based on alloc
func (tv *TextView) RenderSize() gi.Vec2D {
spc := tv.Sty.BoxSpace()
if tv.Par == nil {
return gi.Vec2DZero
}
parw := tv.ParentLayout()
if parw == nil {
log.Printf("giv.TextView Programmer Error: A TextView MUST be located within a parent Layout object -- instead parent is %v at: %v\n", tv.Par.Type(), tv.PathUnique())
return gi.Vec2DZero
}
parw.SetReRenderAnchor()
paloc := parw.LayData.AllocSizeOrig
if !paloc.IsZero() {
// fmt.Printf("paloc: %v, pvp: %v lineonoff: %v\n", paloc, parw.VpBBox, tv.LineNoOff)
tv.RenderSz = paloc.Sub(parw.ExtraSize).SubVal(spc * 2)
tv.RenderSz.X -= spc // extra space
// fmt.Printf("alloc rendersz: %v\n", tv.RenderSz)
} else {
sz := tv.LayData.AllocSizeOrig
if sz.IsZero() {
sz = tv.LayData.SizePrefOrMax()
}
if !sz.IsZero() {
sz.SetSubVal(2 * spc)
}
tv.RenderSz = sz
// fmt.Printf("fallback rendersz: %v\n", tv.RenderSz)
}
tv.RenderSz.X -= tv.LineNoOff
// fmt.Printf("rendersz: %v\n", tv.RenderSz)
return tv.RenderSz
}
// HiStyle applies the highlighting styles from buffer markup style
func (tv *TextView) HiStyle() {
if !tv.Buf.Hi.HasHi() {
return
}
tv.CSS = tv.Buf.Hi.CSSProps
if chp, ok := ki.SubProps(tv.CSS, ".chroma"); ok {
for ky, vl := range chp { // apply to top level
tv.SetProp(ky, vl)
}
}
}
// LayoutAllLines generates TextRenders of lines from our TextBuf, from the
// Markup version of the source, and returns whether the current rendered size
// is different from what it was previously
func (tv *TextView) LayoutAllLines(inLayout bool) bool {
if inLayout && tv.HasFlag(int(TextViewInReLayout)) {
return false
}
if tv.Buf == nil || tv.Buf.NumLines() == 0 {
tv.NLines = 0
return tv.ResizeIfNeeded(image.ZP)
}
if tv.Sty.Font.Size.Val == 0 { // not yet styled
tv.StyleTextView()
}
tv.lastFilename = tv.Buf.Filename
tv.Buf.Hi.TabSize = tv.Sty.Text.TabSize
tv.HiStyle()
// fmt.Printf("layout all: %v\n", tv.Nm)
tv.NLines = tv.Buf.NumLines()
nln := tv.NLines
if cap(tv.Renders) >= nln {
tv.Renders = tv.Renders[:nln]
} else {
tv.Renders = make([]gi.TextRender, nln)
}
if cap(tv.Offs) >= nln {
tv.Offs = tv.Offs[:nln]
} else {
tv.Offs = make([]float32, nln)
}
tv.VisSizes()
sz := tv.RenderSz
// fmt.Printf("rendersize: %v\n", sz)
sty := &tv.Sty
fst := sty.Font
fst.BgColor.SetColor(nil)
off := float32(0)
mxwd := sz.X // always start with our render size
tv.Buf.MarkupMu.RLock()
tv.HasLinks = false
for ln := 0; ln < nln; ln++ {
tv.Renders[ln].SetHTMLPre(tv.Buf.Markup[ln], &fst, &sty.Text, &sty.UnContext, tv.CSS)
tv.Renders[ln].LayoutStdLR(&sty.Text, &sty.Font, &sty.UnContext, sz)
if !tv.HasLinks && len(tv.Renders[ln].Links) > 0 {
tv.HasLinks = true
}
tv.Offs[ln] = off
lsz := gi.Max32(tv.Renders[ln].Size.Y, tv.LineHeight)
off += lsz
mxwd = gi.Max32(mxwd, tv.Renders[ln].Size.X)
}
tv.Buf.MarkupMu.RUnlock()
extraHalf := tv.LineHeight * 0.5 * float32(tv.VisSize.Y)
nwSz := gi.Vec2D{mxwd, off + extraHalf}.ToPointCeil()
// fmt.Printf("lay lines: diff: %v old: %v new: %v\n", diff, tv.LinesSize, nwSz)
if inLayout {
tv.LinesSize = nwSz
return tv.SetSize()
}
return tv.ResizeIfNeeded(nwSz)
}
// SetSize updates our size only if larger than our allocation
func (tv *TextView) SetSize() bool {
sty := &tv.Sty
spc := sty.BoxSpace()
rndsz := tv.RenderSz
rndsz.X += tv.LineNoOff
netsz := gi.Vec2D{float32(tv.LinesSize.X) + tv.LineNoOff, float32(tv.LinesSize.Y)}
cursz := tv.LayData.AllocSize.SubVal(2 * spc)
if cursz.X < 10 || cursz.Y < 10 {
nwsz := netsz.Max(rndsz)
tv.Size2DFromWH(nwsz.X, nwsz.Y)
tv.LayData.Size.Need = tv.LayData.AllocSize
tv.LayData.Size.Pref = tv.LayData.AllocSize
return true
}
nwsz := netsz.Max(rndsz)
alloc := tv.LayData.AllocSize
tv.Size2DFromWH(nwsz.X, nwsz.Y)
if alloc != tv.LayData.AllocSize {
tv.LayData.Size.Need = tv.LayData.AllocSize
tv.LayData.Size.Pref = tv.LayData.AllocSize
return true
}
// fmt.Printf("NO resize: netsz: %v cursz: %v rndsz: %v\n", netsz, cursz, rndsz)
return false
}
// ResizeIfNeeded resizes the edit area if different from current setting --
// returns true if resizing was performed
func (tv *TextView) ResizeIfNeeded(nwSz image.Point) bool {
if nwSz == tv.LinesSize {
return false
}
// fmt.Printf("%v needs resize: %v\n", tv.Nm, nwSz)
tv.LinesSize = nwSz
diff := tv.SetSize()
if !diff {
// fmt.Printf("%v resize no setsize: %v\n", tv.Nm, nwSz)
return false
}
ly := tv.ParentLayout()
if ly != nil {
tv.SetFlag(int(TextViewInReLayout))
ly.GatherSizes() // can't call Size2D b/c that resets layout
ly.Layout2DTree()
tv.SetFlag(int(TextViewRenderScrolls))
tv.ClearFlag(int(TextViewInReLayout))
// fmt.Printf("resized: %v\n", tv.LayData.AllocSize)
}
return true
}
// LayoutLines generates render of given range of lines (including
// highlighting). end is *inclusive* line. isDel means this is a delete and
// thus offsets for all higher lines need to be recomputed. returns true if
// overall number of effective lines (e.g., from word-wrap) is now different
// than before, and thus a full re-render is needed.
func (tv *TextView) LayoutLines(st, ed int, isDel bool) bool {
if tv.Buf == nil || tv.Buf.NumLines() == 0 {
return false
}
sty := &tv.Sty
fst := sty.Font
fst.BgColor.SetColor(nil)
mxwd := float32(tv.LinesSize.X)
rerend := false
tv.Buf.MarkupMu.RLock()
for ln := st; ln <= ed; ln++ {
curspans := len(tv.Renders[ln].Spans)
tv.Renders[ln].SetHTMLPre(tv.Buf.Markup[ln], &fst, &sty.Text, &sty.UnContext, tv.CSS)
tv.Renders[ln].LayoutStdLR(&sty.Text, &sty.Font, &sty.UnContext, tv.RenderSz)
if !tv.HasLinks && len(tv.Renders[ln].Links) > 0 {
tv.HasLinks = true
}
nwspans := len(tv.Renders[ln].Spans)
if nwspans != curspans && (nwspans > 1 || curspans > 1) {
rerend = true
}
mxwd = gi.Max32(mxwd, tv.Renders[ln].Size.X)
}
tv.Buf.MarkupMu.RUnlock()
// update all offsets to end of text
if rerend || isDel || st != ed {
ofst := st - 1
if ofst < 0 {
ofst = 0
}
off := tv.Offs[ofst]
for ln := ofst; ln < tv.NLines; ln++ {
tv.Offs[ln] = off
lsz := gi.Max32(tv.Renders[ln].Size.Y, tv.LineHeight)
off += lsz
}
extraHalf := tv.LineHeight * 0.5 * float32(tv.VisSize.Y)
nwSz := gi.Vec2D{mxwd, off + extraHalf}.ToPointCeil()
tv.ResizeIfNeeded(nwSz)
} else {
nwSz := gi.Vec2D{mxwd, 0}.ToPointCeil()
nwSz.Y = tv.LinesSize.Y
tv.ResizeIfNeeded(nwSz)
}
return rerend
}
///////////////////////////////////////////////////////////////////////////////
// Cursor Navigation
// CursorMovedSig sends the signal that cursor has moved
func (tv *TextView) CursorMovedSig() {
tv.TextViewSig.Emit(tv.This(), int64(TextViewCursorMoved), tv.CursorPos)
}
// ValidateCursor sets current cursor to a valid cursor position
func (tv *TextView) ValidateCursor() {
if tv.Buf != nil {
tv.CursorPos = tv.Buf.ValidPos(tv.CursorPos)
} else {
tv.CursorPos = TextPosZero
}
}
// WrappedLines returns the number of wrapped lines (spans) for given line number
func (tv *TextView) WrappedLines(ln int) int {
if ln >= len(tv.Renders) {
return 0
}
return len(tv.Renders[ln].Spans)
}
// WrappedLineNo returns the wrapped line number (span index) and rune index
// within that span of the given character position within line in position,
// and false if out of range (last valid position returned in that case -- still usable).
func (tv *TextView) WrappedLineNo(pos TextPos) (si, ri int, ok bool) {
if pos.Ln >= len(tv.Renders) {
return 0, 0, false
}
return tv.Renders[pos.Ln].RuneSpanPos(pos.Ch)
}
// SetCursor sets a new cursor position, enforcing it in range
func (tv *TextView) SetCursor(pos TextPos) {
if tv.NLines == 0 || tv.Buf == nil {
tv.CursorPos = TextPosZero
return
}
tv.ClearScopelights()
tv.CursorPos = tv.Buf.ValidPos(pos)
tv.CursorMovedSig()
txt := tv.Buf.Line(tv.CursorPos.Ln)
ch := tv.CursorPos.Ch
if ch < len(txt) {
r := txt[ch]
if r == '{' || r == '}' || r == '(' || r == ')' || r == '[' || r == ']' {
tp, found := tv.Buf.FindScopeMatch(txt[ch], tv.CursorPos)
if found {
tv.Scopelights = append(tv.Scopelights, NewTextRegionPos(tv.CursorPos, TextPos{tv.CursorPos.Ln, tv.CursorPos.Ch + 1}))
tv.Scopelights = append(tv.Scopelights, NewTextRegionPos(tp, TextPos{tp.Ln, tp.Ch + 1}))
if tv.CursorPos.Ln < tp.Ln {
tv.RenderLines(tv.CursorPos.Ln, tp.Ln)
} else {
tv.RenderLines(tp.Ln, tv.CursorPos.Ln)
}
}
}
}
}
// SetCursorShow sets a new cursor position, enforcing it in range, and shows
// the cursor (scroll to if hidden, render)
func (tv *TextView) SetCursorShow(pos TextPos) {
tv.SetCursor(pos)
tv.ScrollCursorToCenterIfHidden()
tv.RenderCursor(true)
}
// SetCursorCol sets the current target cursor column (CursorCol) to that
// of the given position
func (tv *TextView) SetCursorCol(pos TextPos) {
if wln := tv.WrappedLines(pos.Ln); wln > 1 {
si, ri, ok := tv.WrappedLineNo(pos)
if ok && si > 0 {
tv.CursorCol = ri
} else {
tv.CursorCol = pos.Ch
}
} else {
tv.CursorCol = pos.Ch
}
}
// SavePosHistory saves the cursor position in history stack of cursor positions
func (tv *TextView) SavePosHistory(pos TextPos) {
if tv.Buf == nil {
return
}
tv.Buf.SavePosHistory(pos)
tv.PosHistIdx = len(tv.Buf.PosHistory) - 1
}
// CursorToHistPrev moves cursor to previous position on history list --
// returns true if moved
func (tv *TextView) CursorToHistPrev() bool {
if tv.NLines == 0 || tv.Buf == nil {
tv.CursorPos = TextPosZero
return false
}
sz := len(tv.Buf.PosHistory)
if sz == 0 {
return false
}
tv.PosHistIdx--
if tv.PosHistIdx < 0 {
tv.PosHistIdx = 0
return false
}
tv.PosHistIdx = ints.MinInt(sz-1, tv.PosHistIdx)
pos := tv.Buf.PosHistory[tv.PosHistIdx]
tv.CursorPos = tv.Buf.ValidPos(pos)
tv.CursorMovedSig()
tv.ScrollCursorToCenterIfHidden()
tv.RenderCursor(true)
return true
}
// CursorToHistNext moves cursor to previous position on history list --
// returns true if moved
func (tv *TextView) CursorToHistNext() bool {
if tv.NLines == 0 || tv.Buf == nil {
tv.CursorPos = TextPosZero
return false
}
sz := len(tv.Buf.PosHistory)
if sz == 0 {
return false
}
tv.PosHistIdx++
if tv.PosHistIdx >= sz-1 {
tv.PosHistIdx = sz - 1
return false
}
pos := tv.Buf.PosHistory[tv.PosHistIdx]
tv.CursorPos = tv.Buf.ValidPos(pos)
tv.CursorMovedSig()
tv.ScrollCursorToCenterIfHidden()
tv.RenderCursor(true)
return true
}
// SelectRegUpdate updates current select region based on given cursor position
// relative to SelectStart position
func (tv *TextView) SelectRegUpdate(pos TextPos) {
if pos.IsLess(tv.SelectStart) {
tv.SelectReg.Start = pos
tv.SelectReg.End = tv.SelectStart
} else {
tv.SelectReg.Start = tv.SelectStart
tv.SelectReg.End = pos
}
}
// CursorSelect updates selection based on cursor movements, given starting
// cursor position and tv.CursorPos is current
func (tv *TextView) CursorSelect(org TextPos) {
if !tv.SelectMode {
return
}
tv.SelectRegUpdate(tv.CursorPos)
tv.RenderSelectLines()
}
// CursorForward moves the cursor forward
func (tv *TextView) CursorForward(steps int) {
updt := tv.Viewport.Win.UpdateStart()
defer tv.Viewport.Win.UpdateEnd(updt)
tv.ValidateCursor()
org := tv.CursorPos
for i := 0; i < steps; i++ {
tv.CursorPos.Ch++
if tv.CursorPos.Ch > tv.Buf.LineLen(tv.CursorPos.Ln) {
if tv.CursorPos.Ln < tv.NLines-1 {
tv.CursorPos.Ch = 0
tv.CursorPos.Ln++
} else {
tv.CursorPos.Ch = tv.Buf.LineLen(tv.CursorPos.Ln)
}
}
}
tv.SetCursorCol(tv.CursorPos)
tv.SetCursorShow(tv.CursorPos)
tv.CursorSelect(org)
}
// CursorForwardWord moves the cursor forward by words
func (tv *TextView) CursorForwardWord(steps int) {
updt := tv.Viewport.Win.UpdateStart()
defer tv.Viewport.Win.UpdateEnd(updt)
tv.ValidateCursor()
org := tv.CursorPos
for i := 0; i < steps; i++ {
txt := tv.Buf.Line(tv.CursorPos.Ln)
sz := len(txt)
if sz > 0 && tv.CursorPos.Ch < sz {
ch := tv.CursorPos.Ch
var done = false
for ch < sz && !done { // if on a wb, go past
r1 := txt[ch]
r2 := rune(-1)
if ch < sz-1 {
r2 = txt[ch+1]
}
if tv.IsWordBreak(r1, r2) {
ch++
} else {
done = true
}
}
done = false
for ch < sz && !done {
r1 := txt[ch]
r2 := rune(-1)
if ch < sz-1 {
r2 = txt[ch+1]
}
if !tv.IsWordBreak(r1, r2) {
ch++
} else {
done = true
}
}
tv.CursorPos.Ch = ch
} else {
if tv.CursorPos.Ln < tv.NLines-1 {
tv.CursorPos.Ch = 0
tv.CursorPos.Ln++
} else {
tv.CursorPos.Ch = tv.Buf.LineLen(tv.CursorPos.Ln)
}
}
}
tv.SetCursorCol(tv.CursorPos)
tv.SetCursorShow(tv.CursorPos)
tv.CursorSelect(org)
}
// CursorDown moves the cursor down line(s)
func (tv *TextView) CursorDown(steps int) {
updt := tv.Viewport.Win.UpdateStart()
defer tv.Viewport.Win.UpdateEnd(updt)
tv.ValidateCursor()
org := tv.CursorPos
pos := tv.CursorPos
for i := 0; i < steps; i++ {
gotwrap := false
if wln := tv.WrappedLines(pos.Ln); wln > 1 {
si, ri, _ := tv.WrappedLineNo(pos)
if si < wln-1 {
si++
mxlen := ints.MinInt(len(tv.Renders[pos.Ln].Spans[si].Text), tv.CursorCol)
if tv.CursorCol < mxlen {
ri = tv.CursorCol
} else {
ri = mxlen
}
nwc, _ := tv.Renders[pos.Ln].SpanPosToRuneIdx(si, ri)
if si == wln-1 && ri == mxlen {
nwc++
}
pos.Ch = nwc
gotwrap = true
}
}
if !gotwrap {
pos.Ln++
if pos.Ln >= tv.NLines {
pos.Ln = tv.NLines - 1
break
}
mxlen := ints.MinInt(tv.Buf.LineLen(pos.Ln), tv.CursorCol)
if tv.CursorCol < mxlen {
pos.Ch = tv.CursorCol
} else {
pos.Ch = mxlen
}
}
}
tv.SetCursorShow(pos)
tv.CursorSelect(org)
}
// CursorPageDown moves the cursor down page(s), where a page is defined abcdef
// dynamically as just moving the cursor off the screen
func (tv *TextView) CursorPageDown(steps int) {
updt := tv.Viewport.Win.UpdateStart()
defer tv.Viewport.Win.UpdateEnd(updt)
tv.ValidateCursor()
org := tv.CursorPos
for i := 0; i < steps; i++ {
lvln := tv.LastVisibleLine(tv.CursorPos.Ln)
tv.CursorPos.Ln = lvln
if tv.CursorPos.Ln >= tv.NLines {
tv.CursorPos.Ln = tv.NLines - 1
}
tv.CursorPos.Ch = ints.MinInt(tv.Buf.LineLen(tv.CursorPos.Ln), tv.CursorCol)
tv.ScrollCursorToTop()
tv.RenderCursor(true)
}
tv.SetCursor(tv.CursorPos)
tv.CursorSelect(org)
}
// CursorBackward moves the cursor backward
func (tv *TextView) CursorBackward(steps int) {
updt := tv.Viewport.Win.UpdateStart()
defer tv.Viewport.Win.UpdateEnd(updt)
tv.ValidateCursor()
org := tv.CursorPos
for i := 0; i < steps; i++ {
tv.CursorPos.Ch--
if tv.CursorPos.Ch < 0 {
if tv.CursorPos.Ln > 0 {
tv.CursorPos.Ln--
tv.CursorPos.Ch = tv.Buf.LineLen(tv.CursorPos.Ln)
} else {
tv.CursorPos.Ch = 0
}
}
}
tv.SetCursorCol(tv.CursorPos)
tv.SetCursorShow(tv.CursorPos)
tv.CursorSelect(org)
}
// CursorBackwardWord moves the cursor backward by words
func (tv *TextView) CursorBackwardWord(steps int) {
updt := tv.Viewport.Win.UpdateStart()
defer tv.Viewport.Win.UpdateEnd(updt)