Add and replace []string buffer with ropes
This commit is contained in:
Luke I. Wilson
parent
bd6f1cf79e
commit
40e1b40672
24
main.go
24
main.go
@ -77,7 +77,7 @@ func main() {
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}
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}
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textEdit := ui.NewTextEdit(&s, os.Args[i], string(bytes), &theme)
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textEdit := ui.NewTextEdit(&s, os.Args[i], bytes, &theme)
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textEdit.Dirty = dirty
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tabContainer.AddTab(os.Args[i], textEdit)
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}
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@ -88,7 +88,7 @@ func main() {
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fileMenu := ui.NewMenu("_File", &theme)
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fileMenu.AddItems([]ui.Item{&ui.ItemEntry{Name: "_New File", Shortcut: "Ctrl+N", Callback: func() {
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textEdit := ui.NewTextEdit(&s, "", "", &theme) // No file path, no contents
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textEdit := ui.NewTextEdit(&s, "", []byte{}, &theme) // No file path, no contents
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tabContainer.AddTab("noname", textEdit)
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}}, &ui.ItemEntry{Name: "_Open...", Shortcut: "Ctrl+O", Callback: func() {
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callback := func(filePaths []string) {
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@ -104,7 +104,7 @@ func main() {
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panic("Could not read all of file")
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}
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textEdit := ui.NewTextEdit(&s, path, string(bytes), &theme)
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textEdit := ui.NewTextEdit(&s, path, bytes, &theme)
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tabContainer.AddTab(path, textEdit)
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}
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// TODO: free the dialog instead?
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@ -129,14 +129,12 @@ func main() {
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tab := tabContainer.GetTab(tabContainer.GetSelectedTabIdx())
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te := tab.Child.(*ui.TextEdit)
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if len(te.FilePath) > 0 {
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contents := te.String()
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// Write the contents into the file, creating one if it does
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// not exist.
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err := ioutil.WriteFile(te.FilePath, []byte(contents), fs.ModePerm)
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err := ioutil.WriteFile(te.FilePath, te.Buffer.Bytes(), fs.ModePerm)
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if err != nil {
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panic("Could not write file at path " + te.FilePath)
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}
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} // TODO: Replace with io.Writer method
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te.Dirty = false
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}
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@ -202,11 +200,11 @@ func main() {
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if tabContainer.GetTabCount() > 0 {
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tab := tabContainer.GetTab(tabContainer.GetSelectedTabIdx())
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te := tab.Child.(*ui.TextEdit)
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selectedStr := te.GetSelectedString()
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if selectedStr != "" { // If something is selected...
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bytes := te.GetSelectedBytes()
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if len(bytes) > 0 { // If something is selected...
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te.Delete(false) // Delete the selection
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// TODO: better error handling within editor
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_ = ClipWrite(selectedStr) // Add the selectedStr to clipboard
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_ = ClipWrite(string(bytes)) // Add the selectedStr to clipboard
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}
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changeFocus(tabContainer)
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}
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@ -214,9 +212,9 @@ func main() {
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if tabContainer.GetTabCount() > 0 {
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tab := tabContainer.GetTab(tabContainer.GetSelectedTabIdx())
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te := tab.Child.(*ui.TextEdit)
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selectedStr := te.GetSelectedString()
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if selectedStr != "" { // If there is something selected...
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_ = ClipWrite(selectedStr) // Add selectedStr to clipboard
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bytes := te.GetSelectedBytes()
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if len(bytes) > 0 { // If there is something selected...
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_ = ClipWrite(string(bytes)) // Add selectedStr to clipboard
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}
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changeFocus(tabContainer)
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}
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@ -35,6 +35,10 @@ type Buffer interface {
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// endCol, inclusive bounds.
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Remove(startLine, startCol, endLine, endCol int)
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// Returns the number of occurrences of 'sequence' in the buffer, within the range
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// of start line and col, to end line and col. [start, end) (exclusive end).
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Count(startLine, startCol, endLine, endCol int, sequence []byte) int
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// Len returns the number of bytes in the buffer.
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Len() int
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@ -43,13 +47,19 @@ type Buffer interface {
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// basically counts the number of newline ('\n') characters in a buffer.
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Lines() int
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// ColsInLine returns the number of columns in the given line. That is, the
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// number of Utf-8 codepoints (or runes) in line, not bytes.
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// RunesInLine returns the number of runes in the given line. That is, the
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// number of Utf-8 codepoints in the line, not bytes. Includes the line delimiter
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// in the count. If that line delimiter is CRLF ('\r\n'), then it adds two.
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RunesInLineWithDelim(line int) int
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// RunesInLine returns the number of runes in the given line. That is, the
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// number of Utf-8 codepoints in the line, not bytes. Excludes line delimiters.
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RunesInLine(line int) int
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// ClampLineCol is a utility function to clamp any provided line and col to
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// only possible values within the buffer. It first clamps the line, then clamps
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// the column within that line.
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// only possible values within the buffer, pointing to runes. It first clamps
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// the line, then clamps the column. The column is clamped between zero and
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// the last rune before the line delimiter.
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ClampLineCol(line, col int) (int, int)
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WriteTo(w io.Writer) (int64, error)
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@ -63,13 +63,22 @@ func (b *RopeBuffer) Line(line int) []byte {
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_, r := _rope.SplitAt(pos)
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l, _ := r.SplitAt(_rope.Len() - pos)
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var isCRLF bool // true if the last byte was '\r'
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l.EachLeaf(func(n *rope.Node) bool {
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data := n.Value() // Reference; not a copy.
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var i int
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for i < len(data) {
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if data[i] == '\n' {
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bytes++ // Add the newline byte
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if data[i] == '\r' {
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isCRLF = true
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} else if data[i] == '\n' {
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if isCRLF {
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bytes += 2 // Add the CRLF bytes
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} else {
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bytes += 1 // Add LF byte
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}
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return true // Read (past-tense) the whole line
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} else {
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isCRLF = false
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}
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// Respect Utf-8 codepoint boundaries
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@ -108,6 +117,14 @@ func (b *RopeBuffer) Remove(startLine, startCol, endLine, endCol int) {
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(*rope.Node)(b).Remove(b.pos(startLine, startCol), b.pos(endLine, endCol)+1)
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}
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// Returns the number of occurrences of 'sequence' in the buffer, within the range
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// of start line and col, to end line and col. End is exclusive.
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func (b *RopeBuffer) Count(startLine, startCol, endLine, endCol int, sequence []byte) int {
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startPos := b.pos(startLine, startCol)
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endPos := b.pos(endLine, endCol)
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return (*rope.Node)(b).Count(startPos, endPos, sequence)
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}
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// Len returns the number of bytes in the buffer.
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func (b *RopeBuffer) Len() int {
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return (*rope.Node)(b).Len()
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@ -121,41 +138,6 @@ func (b *RopeBuffer) Lines() int {
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return rope.Count(0, rope.Len(), []byte{'\n'}) + 1
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}
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// pos is the first byte index in the line we want to count runes/cols. pos can point to
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// a newline or be greater than or equal to the number of bytes in the buffer, and will
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// return 0 for both cases.
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func (b *RopeBuffer) runesInLine(pos int) int {
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_rope := (*rope.Node)(b)
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ropeLen := _rope.Len()
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if pos >= ropeLen {
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return 0
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}
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var count int
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_, r := _rope.SplitAt(pos)
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l, _ := r.SplitAt(ropeLen - pos)
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l.EachLeaf(func(n *rope.Node) bool {
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data := n.Value() // Reference; not a copy.
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var i int
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for i < len(data) {
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if data[i] == '\n' {
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return true // Read (past-tense) the whole line
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}
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count++
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// Respect Utf-8 codepoint boundaries
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_, size := utf8.DecodeRune(data[i:])
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i += size
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}
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return false // Have not read the whole line, yet
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})
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return count
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}
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// getLineStartPos returns the first byte index of the given line (starting from zero).
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// The returned index can be equal to the length of the buffer, not pointing to any byte,
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// which means the byte is on the last, and empty, line of the buffer. If line is greater
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@ -182,16 +164,99 @@ func (b *RopeBuffer) getLineStartPos(line int) int {
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return pos
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}
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// RunesInLineWithDelim returns the number of runes in the given line. That is, the
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// number of Utf-8 codepoints in the line, not bytes. Includes the line delimiter
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// in the count. If that line delimiter is CRLF ('\r\n'), then it adds two.
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func (b *RopeBuffer) RunesInLineWithDelim(line int) int {
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linePos := b.getLineStartPos(line)
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_rope := (*rope.Node)(b)
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ropeLen := _rope.Len()
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if linePos >= ropeLen {
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return 0
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}
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var count int
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_, r := _rope.SplitAt(linePos)
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l, _ := r.SplitAt(ropeLen - linePos)
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var isCRLF bool
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l.EachLeaf(func(n *rope.Node) bool {
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data := n.Value() // Reference; not a copy.
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var i int
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for i < len(data) {
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count++ // Before: we count the line delimiter
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if data[i] == '\r' {
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isCRLF = true
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} else if data[i] == '\n' {
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return true // Read (past-tense) the whole line
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} else {
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if isCRLF {
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isCRLF = false
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count++ // Add the '\r' we previously thought was part of the delim.
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}
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}
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// Respect Utf-8 codepoint boundaries
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_, size := utf8.DecodeRune(data[i:])
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i += size
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}
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return false // Have not read the whole line, yet
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})
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return count
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}
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// RunesInLine returns the number of runes in the given line. That is, the
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// number of Utf-8 codepoints in the line, not bytes.
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// number of Utf-8 codepoints in the line, not bytes. Excludes line delimiters.
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func (b *RopeBuffer) RunesInLine(line int) int {
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linePos := b.getLineStartPos(line)
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return b.runesInLine(linePos)
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_rope := (*rope.Node)(b)
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ropeLen := _rope.Len()
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if linePos >= ropeLen {
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return 0
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}
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var count int
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_, r := _rope.SplitAt(linePos)
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l, _ := r.SplitAt(ropeLen - linePos)
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var isCRLF bool
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l.EachLeaf(func(n *rope.Node) bool {
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data := n.Value() // Reference; not a copy.
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var i int
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for i < len(data) {
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if data[i] == '\r' {
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isCRLF = true
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} else if data[i] == '\n' {
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return true // Read (past-tense) the whole line
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} else {
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if isCRLF {
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isCRLF = false
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count++ // Add the '\r' we previously thought was part of the delim.
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}
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}
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count++
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// Respect Utf-8 codepoint boundaries
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_, size := utf8.DecodeRune(data[i:])
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i += size
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}
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return false // Have not read the whole line, yet
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})
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return count
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}
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// ClampLineCol is a utility function to clamp any provided line and col to
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// only possible values within the buffer, pointing to runes. It first clamps
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// the line, then clamps the column.
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// the line, then clamps the column. The column is clamped between zero and
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// the last rune before the line delimiter.
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func (b *RopeBuffer) ClampLineCol(line, col int) (int, int) {
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if line < 0 {
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line = 0
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@ -201,8 +266,8 @@ func (b *RopeBuffer) ClampLineCol(line, col int) (int, int) {
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if col < 0 {
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col = 0
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} else if cols := b.RunesInLine(line)-1; col > cols {
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col = cols
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} else if runes := b.RunesInLine(line); col > runes {
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col = runes
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}
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return line, col
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@ -34,14 +34,52 @@ func TestRopeBounds(t *testing.T) {
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t.Fail()
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}
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if len := buf.RunesInLineWithDelim(4); len != 0 {
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t.Errorf("Expected 0 runes in line 5, found %v", len)
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t.Fail()
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}
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line, col := buf.ClampLineCol(15, 5) // Should become last line, first column
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if line != 4 && col != 0 {
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t.Errorf("Expected to clamp line col to 4,0 got %v,%v", line, col)
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t.Fail()
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}
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line, col = buf.ClampLineCol(4, -1)
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if line != 4 && col != 0 {
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t.Errorf("Expected to clamp line col to 4,0 got %v,%v", line, col)
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t.Fail()
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}
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line, col = buf.ClampLineCol(2, 5) // Should be third line, pointing at the newline char
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if line != 2 && col != 5 {
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t.Errorf("Expected to clamp line, col to 2,5 got %v,%v", line, col)
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t.Fail()
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}
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if line := string(buf.Line(2)); line != "\tsome\n" {
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t.Errorf("Expected line 3 to equal \"\\tsome\", got %#v", line)
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t.Fail()
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}
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if line := string(buf.Line(4)); line != "" {
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t.Errorf("Got %#v", line)
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t.Fail()
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}
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}
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func TestRopeCount(t *testing.T) {
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var buf Buffer = NewRopeBuffer([]byte("\t\tlot of\n\ttabs"))
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tabsAtOf := buf.Count(0, 0, 0, 7, []byte{'\t'})
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if tabsAtOf != 2 {
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t.Errorf("Expected 2 tabs before 'of', got %#v", tabsAtOf)
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t.Fail()
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}
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tabs := buf.Count(0, 0, 0, 0, []byte{'\t'})
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if tabs != 0 {
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t.Errorf("Expected no tabs at column zero, got %v", tabs)
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t.Fail()
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}
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}
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216
ui/textedit.go
216
ui/textedit.go
@ -48,9 +48,9 @@ type TextEdit struct {
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Theme *Theme
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}
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// New will initialize the buffer using the given string `contents`. If the `filePath` or `FilePath` is empty,
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// New will initialize the buffer using the given 'contents'. If the 'filePath' or 'FilePath' is empty,
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// it can be assumed that the TextEdit has no file association, or it is unsaved.
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func NewTextEdit(screen *tcell.Screen, filePath, contents string, theme *Theme) *TextEdit {
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func NewTextEdit(screen *tcell.Screen, filePath string, contents []byte, theme *Theme) *TextEdit {
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te := &TextEdit{
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Buffer: nil,
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LineNumbers: true,
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@ -66,11 +66,11 @@ func NewTextEdit(screen *tcell.Screen, filePath, contents string, theme *Theme)
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// SetContents applies the string to the internal buffer of the TextEdit component.
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// The string is determined to be either CRLF or LF based on line-endings.
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func (t *TextEdit) SetContents(contents string) {
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func (t *TextEdit) SetContents(contents []byte) {
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var i int
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loop:
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for i < len(contents) {
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switch r {
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switch contents[i] {
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case '\n':
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t.IsCRLF = false
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break loop
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@ -79,7 +79,8 @@ loop:
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t.IsCRLF = true
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break loop
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}
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i += utf8.DecodeRune(contents[i:])
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_, size := utf8.DecodeRune(contents[i:])
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i += size
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}
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t.Buffer = buffer.NewRopeBuffer(contents)
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@ -94,10 +95,6 @@ func (t *TextEdit) GetLineDelimiter() string {
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}
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}
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func (t *TextEdit) String() string {
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return strings.Join(t.buffer, t.GetLineDelimiter())
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}
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// Changes a file's line delimiters. If `crlf` is true, then line delimiters are replaced
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// with Windows CRLF (\r\n). If `crlf` is false, then line delimtiers are replaced with Unix
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// LF (\n). The TextEdit `IsCRLF` variable is updated with the new value.
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@ -105,6 +102,8 @@ func (t *TextEdit) ChangeLineDelimiters(crlf bool) {
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t.IsCRLF = crlf
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t.Dirty = true
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// line delimiters are constructed with String() function
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// TODO: ^ not true anymore ^
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panic("Cannot ChangeLineDelimiters")
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}
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// Delete with `forwards` false will backspace, destroying the character before the cursor,
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@ -114,59 +113,26 @@ func (t *TextEdit) Delete(forwards bool) {
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t.Dirty = true
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if t.selectMode { // If text is selected, delete the whole selection
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t.cury, t.curx = t.clampLineCol(t.selection.EndLine, t.selection.EndCol)
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t.cury, t.curx = t.Buffer.ClampLineCol(t.selection.EndLine, t.selection.EndCol)
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t.selectMode = false // Disable selection and prevent infinite loop
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t.Delete(true) // Delete last character of selection first
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// Delete from end, backwards, until we are at the start of the selection
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for { // TODO: inefficient
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if t.cury == t.selection.StartLine && t.curx == t.selection.StartCol {
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break
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}
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t.Delete(false) // NOTE: we want to delete start column as well.
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}
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// Delete the region
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t.Buffer.Remove(t.selection.StartLine, t.selection.StartCol, t.selection.EndLine, t.selection.EndCol)
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t.SetLineCol(t.selection.StartLine, t.selection.StartCol) // Set cursor to start of region
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return
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}
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// TODO: deleting through lines
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if forwards { // Delete the character after the cursor
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if t.curx < len(t.buffer[t.cury]) { // If the cursor is not at the end of the line...
|
||||
lineRunes := []rune(t.buffer[t.cury])
|
||||
copy(lineRunes[t.curx:], lineRunes[t.curx+1:]) // Shift runes at cursor + 1 left
|
||||
lineRunes = lineRunes[:len(lineRunes)-1] // Shrink line length
|
||||
t.buffer[t.cury] = string(lineRunes) // Reassign line
|
||||
} else { // If the cursor is at the end of the line...
|
||||
if t.cury < len(t.buffer)-1 { // And the cursor is not at the last line...
|
||||
oldLineIdx := t.cury + 1
|
||||
curLineRunes := []rune(t.buffer[t.cury])
|
||||
oldLineRunes := []rune(t.buffer[oldLineIdx])
|
||||
curLineRunes = append(curLineRunes, oldLineRunes...) // Append runes from deleted line to current line
|
||||
t.buffer[t.cury] = string(curLineRunes) // Update the current line with the new runes
|
||||
|
||||
copy(t.buffer[oldLineIdx:], t.buffer[oldLineIdx+1:]) // Shift lines below the old line up
|
||||
t.buffer = t.buffer[:len(t.buffer)-1] // Shrink buffer by one line
|
||||
}
|
||||
// If the cursor is not at the end of the last line...
|
||||
if t.cury < t.Buffer.Lines()-1 || t.curx < t.Buffer.RunesInLine(t.cury) {
|
||||
t.Buffer.Remove(t.cury, t.curx, t.cury, t.curx) // Remove character at cursor
|
||||
}
|
||||
} else { // Delete the character before the cursor
|
||||
if t.curx > 0 { // If the cursor is not at the beginning of the line...
|
||||
lineRunes := []rune(t.buffer[t.cury])
|
||||
copy(lineRunes[t.curx-1:], lineRunes[t.curx:]) // Shift runes at cursor left
|
||||
lineRunes = lineRunes[:len(lineRunes)-1] // Shrink line length
|
||||
t.buffer[t.cury] = string(lineRunes) // Reassign line
|
||||
|
||||
t.SetLineCol(t.cury, t.curx-1) // Shift cursor left
|
||||
} else { // If the cursor is at the beginning of the line...
|
||||
if t.cury > 0 { // And the cursor is not at the first line...
|
||||
oldLineIdx := t.cury
|
||||
t.SetLineCol(t.cury-1, len(t.buffer[t.cury-1])) // Cursor goes to the end of the above line
|
||||
curLineRunes := []rune(t.buffer[t.cury])
|
||||
oldLineRunes := []rune(t.buffer[oldLineIdx])
|
||||
curLineRunes = append(curLineRunes, oldLineRunes...) // Append the old line to the current line
|
||||
t.buffer[t.cury] = string(curLineRunes) // Update the current line to the new runes
|
||||
|
||||
copy(t.buffer[oldLineIdx:], t.buffer[oldLineIdx+1:]) // Shift lines below the old line up
|
||||
t.buffer = t.buffer[:len(t.buffer)-1] // Shrink buffer by one line
|
||||
}
|
||||
// If the cursor is not at the first column of the first line...
|
||||
if t.cury > 0 || t.curx > 0 {
|
||||
t.CursorLeft() // Back up to that character
|
||||
t.Buffer.Remove(t.cury, t.curx, t.cury, t.curx) // Remove character at cursor
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -188,99 +154,45 @@ func (t *TextEdit) Insert(contents string) {
|
||||
case '\r':
|
||||
// If the character after is a \n, then it is a CRLF
|
||||
if i+1 < len(runes) && runes[i+1] == '\n' {
|
||||
i++
|
||||
t.insertNewLine()
|
||||
i++ // Consume '\n' after
|
||||
t.Buffer.Insert(t.cury, t.curx, []byte{'\n'})
|
||||
t.SetLineCol(t.cury+1, 0) // Go to the start of that new line
|
||||
}
|
||||
case '\n':
|
||||
t.insertNewLine()
|
||||
t.Buffer.Insert(t.cury, t.curx, []byte{'\n'})
|
||||
t.SetLineCol(t.cury+1, 0) // Go to the start of that new line
|
||||
case '\b':
|
||||
t.Delete(false) // Delete the character before the cursor
|
||||
case '\t':
|
||||
if !t.UseHardTabs { // If this file does not use hard tabs...
|
||||
// Insert spaces
|
||||
spaces := []rune(strings.Repeat(" ", t.TabSize))
|
||||
spacesLen := len(spaces)
|
||||
|
||||
lineRunes := []rune(t.buffer[t.cury])
|
||||
lineRunes = append(lineRunes, spaces...)
|
||||
copy(lineRunes[t.curx+spacesLen:], lineRunes[t.curx:]) // Shift runes at cursor to the right
|
||||
copy(lineRunes[t.curx:], spaces) // Copy spaces into the gap
|
||||
|
||||
t.buffer[t.cury] = string(lineRunes) // Reassign the line
|
||||
|
||||
t.SetLineCol(t.cury, t.curx+spacesLen) // Advance the cursor
|
||||
spaces := strings.Repeat(" ", t.TabSize)
|
||||
t.Buffer.Insert(t.cury, t.curx, []byte(spaces))
|
||||
t.SetLineCol(t.cury, t.curx+len(spaces)) // Advance the cursor
|
||||
break
|
||||
}
|
||||
fallthrough // Append the \t character
|
||||
default:
|
||||
// Insert character into line
|
||||
lineRunes := []rune(t.buffer[t.cury])
|
||||
lineRunes = append(lineRunes, ch) // Extend the length of the string
|
||||
copy(lineRunes[t.curx+1:], lineRunes[t.curx:]) // Shift runes at cursor to the right
|
||||
lineRunes[t.curx] = ch
|
||||
|
||||
t.buffer[t.cury] = string(lineRunes) // Reassign the line
|
||||
|
||||
t.Buffer.Insert(t.cury, t.curx, []byte(string(ch)))
|
||||
t.SetLineCol(t.cury, t.curx+1) // Advance the cursor
|
||||
}
|
||||
}
|
||||
t.prevCurCol = t.curx
|
||||
}
|
||||
|
||||
// insertNewLine inserts a line break at the cursor and sets the cursor position to the first
|
||||
// column of that new line. Text before the cursor on the current line remains on that line,
|
||||
// text at or after the cursor on the current line is moved to the new line.
|
||||
func (t *TextEdit) insertNewLine() {
|
||||
t.Dirty = true
|
||||
|
||||
lineRunes := []rune(t.buffer[t.cury]) // A slice of runes of the old line
|
||||
movedRunes := lineRunes[t.curx:] // A slice of the old line containing runes to be moved
|
||||
newLineRunes := make([]rune, len(movedRunes))
|
||||
copy(newLineRunes, movedRunes) // Copy old runes to new line
|
||||
t.buffer[t.cury] = string(lineRunes[:t.curx]) // Shrink old line's length
|
||||
|
||||
t.buffer = append(t.buffer, "") // Increment buffer length
|
||||
copy(t.buffer[t.cury+2:], t.buffer[t.cury+1:]) // Shift lines after current line down
|
||||
t.buffer[t.cury+1] = string(newLineRunes) // Assign the new line
|
||||
|
||||
t.SetLineCol(t.cury+1, 0) // Go to start of new line
|
||||
t.prevCurCol = t.curx
|
||||
}
|
||||
|
||||
// getTabCountInLineAtCol returns tabs in the given line, at or before that column position,
|
||||
// getTabCountInLineAtCol returns tabs in the given line, before the column position,
|
||||
// if hard tabs are enabled. If hard tabs are not enabled, the function returns zero.
|
||||
// Multiply returned tab count by TabSize to get the offset produced by tabs.
|
||||
// Col must be a valid column position in the given line. Maybe call clampLineCol before
|
||||
// this function.
|
||||
func (t *TextEdit) getTabCountInLineAtCol(line, col int) int {
|
||||
if t.UseHardTabs {
|
||||
lineRunes := []rune(t.buffer[line])
|
||||
return strings.Count(string(lineRunes[:col]), "\t")
|
||||
return t.Buffer.Count(line, 0, line, col, []byte{'\t'})
|
||||
}
|
||||
return 0
|
||||
}
|
||||
|
||||
// clampLineCol clamps the line and col inputs to only valid values within the buffer.
|
||||
func (t *TextEdit) clampLineCol(line, col int) (int, int) {
|
||||
// Clamp the line input
|
||||
if line < 0 {
|
||||
line = 0
|
||||
} else if len := len(t.buffer); line >= len { // If new line is beyond the length of the buffer...
|
||||
line = len - 1 // Change that line to be the end of the buffer, instead
|
||||
}
|
||||
|
||||
lineRunes := []rune(t.buffer[line])
|
||||
|
||||
// Clamp the column input
|
||||
if col < 0 {
|
||||
col = 0
|
||||
} else if len := len(lineRunes); col > len {
|
||||
col = len
|
||||
}
|
||||
|
||||
return line, col
|
||||
}
|
||||
|
||||
// GetLineCol returns (line, col) of the cursor. Zero is origin for both.
|
||||
func (t *TextEdit) GetLineCol() (int, int) {
|
||||
return t.cury, t.curx
|
||||
@ -291,10 +203,10 @@ func (t *TextEdit) GetLineCol() (int, int) {
|
||||
// If `col` is out of bounds, `col` will be clamped to the closest column available for the line.
|
||||
// Will scroll the TextEdit just enough to see the line the cursor is at.
|
||||
func (t *TextEdit) SetLineCol(line, col int) {
|
||||
line, col = t.clampLineCol(line, col)
|
||||
line, col = t.Buffer.ClampLineCol(line, col)
|
||||
|
||||
// Handle hard tabs
|
||||
tabOffset := t.getTabCountInLineAtCol(line, col) * (t.TabSize - 1) // Offset for the current line from hard tabs (temporary; purely visual)
|
||||
tabOffset := t.getTabCountInLineAtCol(line, col) * (t.TabSize-1) // Offset for the current line from hard tabs (temporary; purely visual)
|
||||
|
||||
// Scroll the screen when going to lines out of view
|
||||
if line >= t.scrolly+t.height-1 { // If the new line is below view...
|
||||
@ -312,6 +224,10 @@ func (t *TextEdit) SetLineCol(line, col int) {
|
||||
t.scrollx = col + tabOffset // Scroll left enough to view that column
|
||||
}
|
||||
|
||||
if t.scrollx < 0 {
|
||||
panic("oops")
|
||||
}
|
||||
|
||||
t.cury, t.curx = line, col
|
||||
if t.focused && !t.selectMode {
|
||||
(*t.screen).ShowCursor(t.x+columnWidth+col+tabOffset-t.scrollx, t.y+line-t.scrolly)
|
||||
@ -325,7 +241,7 @@ func (t *TextEdit) CursorUp() {
|
||||
if t.cury <= 0 { // If the cursor is at the first line...
|
||||
t.SetLineCol(t.cury, 0) // Go to beginning
|
||||
} else {
|
||||
line, col := t.clampLineCol(t.cury-1, t.prevCurCol)
|
||||
line, col := t.Buffer.ClampLineCol(t.cury-1, t.prevCurCol)
|
||||
if t.UseHardTabs { // When using hard tabs, subtract offsets produced by tabs
|
||||
tabOffset := t.getTabCountInLineAtCol(line, col) * (t.TabSize - 1)
|
||||
col -= tabOffset // We still count each \t in the col
|
||||
@ -336,10 +252,10 @@ func (t *TextEdit) CursorUp() {
|
||||
|
||||
// CursorDown moves the cursor down a line.
|
||||
func (t *TextEdit) CursorDown() {
|
||||
if t.cury >= len(t.buffer)-1 { // If the cursor is at the last line...
|
||||
t.SetLineCol(t.cury, len(t.buffer[t.cury])) // Go to end of current line
|
||||
if t.cury >= t.Buffer.Lines()-1 { // If the cursor is at the last line...
|
||||
t.SetLineCol(t.cury, math.MaxInt32) // Go to end of current line
|
||||
} else {
|
||||
line, col := t.clampLineCol(t.cury+1, t.prevCurCol)
|
||||
line, col := t.Buffer.ClampLineCol(t.cury+1, t.prevCurCol)
|
||||
if t.UseHardTabs {
|
||||
tabOffset := t.getTabCountInLineAtCol(line, col) * (t.TabSize - 1)
|
||||
col -= tabOffset // We still count each \t in the col
|
||||
@ -363,7 +279,7 @@ func (t *TextEdit) CursorLeft() {
|
||||
func (t *TextEdit) CursorRight() {
|
||||
// If we are at the end of the current line,
|
||||
// and not at the last line...
|
||||
if t.curx >= len([]rune(t.buffer[t.cury])) && t.cury < len(t.buffer)-1 {
|
||||
if t.curx >= t.Buffer.RunesInLine(t.cury) && t.cury < t.Buffer.Lines()-1 {
|
||||
t.SetLineCol(t.cury+1, 0) // Go to beginning of line below
|
||||
} else {
|
||||
t.SetLineCol(t.cury, t.curx+1)
|
||||
@ -377,39 +293,25 @@ func (t *TextEdit) getColumnWidth() int {
|
||||
columnWidth := 0
|
||||
if t.LineNumbers {
|
||||
// Set columnWidth to max count of line number digits
|
||||
columnWidth = Max(2, len(strconv.Itoa(len(t.buffer)))) // Column has minimum width of 2
|
||||
columnWidth = Max(2, len(strconv.Itoa(t.Buffer.Lines()))) // Column has minimum width of 2
|
||||
}
|
||||
return columnWidth
|
||||
}
|
||||
|
||||
// GetSelectedString returns a string of the region of the buffer that is currently selected.
|
||||
// If the returned string is empty, then nothing was selected.
|
||||
func (t *TextEdit) GetSelectedString() string {
|
||||
// GetSelectedBytes returns a byte slice of the region of the buffer that is currently selected.
|
||||
// If the returned string is empty, then nothing was selected. The slice returned may or may not
|
||||
// be a copy of the buffer, so do not write to it.
|
||||
func (t *TextEdit) GetSelectedBytes() []byte {
|
||||
if t.selectMode {
|
||||
lines := make([]string, t.selection.EndLine-t.selection.StartLine+1)
|
||||
copy(lines, t.buffer[t.selection.StartLine:t.selection.EndLine+1])
|
||||
|
||||
// Start last line at end col
|
||||
lastLine := lines[len(lines)-1]
|
||||
if t.selection.EndCol >= len(lastLine) { // If the line delimiter of the last line is selected...
|
||||
// Don't access out-of-bounds and include the line delimiter
|
||||
lastLine = string([]rune(lastLine)[:t.selection.EndCol]) + t.GetLineDelimiter()
|
||||
} else { // Normal access
|
||||
lastLine = string([]rune(lastLine)[:t.selection.EndCol+1])
|
||||
return t.Buffer.Slice(t.selection.StartLine, t.selection.StartCol, t.selection.EndLine, t.selection.EndCol)
|
||||
}
|
||||
lines[len(lines)-1] = lastLine
|
||||
|
||||
lines[0] = string([]rune(lines[0])[t.selection.StartCol:]) // Start first line at start col
|
||||
|
||||
return strings.Join(lines, t.GetLineDelimiter())
|
||||
}
|
||||
return ""
|
||||
return []byte{}
|
||||
}
|
||||
|
||||
// Draw renders the TextEdit component.
|
||||
func (t *TextEdit) Draw(s tcell.Screen) {
|
||||
columnWidth := t.getColumnWidth()
|
||||
bufferLen := len(t.buffer)
|
||||
bufferLines := t.Buffer.Lines()
|
||||
|
||||
textEditStyle := t.Theme.GetOrDefault("TextEdit")
|
||||
selectedStyle := t.Theme.GetOrDefault("TextEditSelected")
|
||||
@ -428,17 +330,15 @@ func (t *TextEdit) Draw(s tcell.Screen) {
|
||||
|
||||
lineNumStr := ""
|
||||
|
||||
if line < bufferLen { // Only index buffer if we are within it...
|
||||
if line < bufferLines { // Only index buffer if we are within it...
|
||||
lineNumStr = strconv.Itoa(line + 1) // Line number as a string
|
||||
|
||||
var lineStr string // Line to be drawn
|
||||
lineStr := string(t.Buffer.Line(line)) // Line to be drawn
|
||||
if t.UseHardTabs {
|
||||
lineStr = strings.ReplaceAll(t.buffer[line], "\t", tabStr)
|
||||
} else {
|
||||
lineStr = t.buffer[line]
|
||||
lineStr = strings.ReplaceAll(lineStr, "\t", tabStr)
|
||||
}
|
||||
|
||||
lineRunes := []rune(lineStr)
|
||||
lineRunes := []rune(lineStr) // TODO: something more efficient here
|
||||
if len(lineRunes) >= t.scrollx { // If some of the line is visible at our horizontal scroll...
|
||||
lineRunes = lineRunes[t.scrollx:] // Trim left side of string we cannot see
|
||||
|
||||
@ -454,10 +354,10 @@ func (t *TextEdit) Draw(s tcell.Screen) {
|
||||
tabCount := t.getTabCountInLineAtCol(line, t.selection.StartCol)
|
||||
selStartIdx = t.selection.StartCol + tabCount*(t.TabSize-1) - t.scrollx
|
||||
}
|
||||
selEndIdx := len(lineRunes) - t.scrollx // used inclusively
|
||||
selEndIdx := len(lineRunes) - t.scrollx - 1 // used inclusively
|
||||
if line == t.selection.EndLine { // If the selection ends somewhere in the line...
|
||||
tabCount := t.getTabCountInLineAtCol(line, t.selection.EndCol)
|
||||
selEndIdx = t.selection.EndCol + tabCount*(t.TabSize-1) - t.scrollx
|
||||
selEndIdx = t.selection.EndCol - 1 + tabCount*(t.TabSize-1) - t.scrollx
|
||||
}
|
||||
|
||||
// NOTE: a special draw function just for selections. Should combine this with ordinary draw
|
||||
@ -620,7 +520,7 @@ func (t *TextEdit) HandleEvent(event tcell.Event) bool {
|
||||
t.SetLineCol(t.cury, 0)
|
||||
t.prevCurCol = t.curx
|
||||
case tcell.KeyEnd:
|
||||
t.SetLineCol(t.cury, len(t.buffer[t.cury]))
|
||||
t.SetLineCol(t.cury, math.MaxInt32) // Max column
|
||||
t.prevCurCol = t.curx
|
||||
case tcell.KeyPgUp:
|
||||
t.SetLineCol(t.scrolly-t.height, t.curx) // Go a page up
|
||||
@ -641,7 +541,7 @@ func (t *TextEdit) HandleEvent(event tcell.Event) bool {
|
||||
case tcell.KeyTab:
|
||||
t.Insert("\t") // (can translate to four spaces)
|
||||
case tcell.KeyEnter:
|
||||
t.insertNewLine()
|
||||
t.Insert("\n")
|
||||
|
||||
// Inserting
|
||||
case tcell.KeyRune:
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user