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textbox_textview.v
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module ui
import gx
// import time
// import encoding.utf8
const textview_margin = 10
const wordwrap_border = 20
// position (cursor_pos, sel_start, sel_end) set in the runes world
pub struct TextView {
pub mut:
text &string = unsafe { nil }
cursor_pos int
sel_start int
sel_end int
// text style
line_height int
// synchronised lines for the text (or maybe a part)
tlv TextLinesView
// textbox
tb &TextBox = unsafe { nil } // needed for textwidth and for is_wordwrap
// line_number
left_margin int
// Syntax Highlighter
sh &SyntaxHighLighter = unsafe { nil }
}
// Structure to help for drawing text line by line and cursor update between lines
// Insertion and deletion would be made directly on TextView.text field and then synchronized
// on textlines except for cursor vertical motion
/*
In the process to make lines only dealing with visible lines:
- if <from> is the line starting the visibility and <to> the line ending the visibility
- if lines := (*tv.text).split("\n")
- then:
tvl.lines[0] = lines[..from_j].join("\n")
tvl.lines[1..(to - from)] = lines[from .. (to + 1)]
tvl.lines[to - from] = lines[(to + 1) ..]
*/
struct TextLinesView {
pub mut:
lines []string
from_i []int
to_i []int
from_j int
to_j int
refresh_visible_lines bool
cursor_pos_i int
cursor_pos_j int
sel_start_j int
sel_start_i int
sel_end_i int
sel_end_j int
}
pub fn (mut tv TextView) init(tb &TextBox) {
tv.tb = tb
tv.text = tb.text // delegate text from tb
tv.update_line_height()
tv.sh = syntaxhighlighter()
tv.sh.init(tv)
// println('INIT: line height: $tv.line_height')
tv.refresh_visible_lines()
tv.update_lines()
tv.cancel_selection()
tv.sync_text_pos()
if tv.tb.has_scrollview {
lock_scrollview_key(tv.tb)
}
}
pub fn (tv &TextView) size() (int, int) {
tv.load_style()
mut w, mut h := 0, textbox_padding_y * 2 + tv.line_height * tv.tlv.lines.len
// println('size ${tv.tb.id}: ${tv.tlv.lines} ${tv.tlv.lines.len} ${tv.tlv.to_j} (width= ${tv.tb.width})')
if tv.tlv.from_j > -1 && tv.tlv.from_j <= (tv.tlv.lines.len - 1) && tv.tlv.to_j > -1
&& tv.tlv.to_j <= (tv.tlv.lines.len - 1) {
for line in tv.tlv.lines[tv.tlv.from_j..(tv.tlv.to_j + 1)] {
lw := tv.text_width(line)
if lw > w {
w = lw
}
}
w += tv.left_margin + textview_margin
}
// println("tv size: $tv.tb.id $w, $h")
return w, h
}
pub fn (tv &TextView) info() {
println('cursor: ${tv.cursor_pos} -> (${tv.tlv.cursor_pos_i}, ${tv.tlv.cursor_pos_j})')
println('sel: (${tv.sel_start}, ${tv.sel_end}) -> (${tv.tlv.sel_start_i}, ${tv.tlv.sel_start_j}, ${tv.tlv.sel_end_i}, ${tv.tlv.sel_end_j})')
}
pub fn (mut tv TextView) is_wordwrap() bool {
return tv.tb.is_wordwrap
}
pub fn (mut tv TextView) set_wordwrap(state bool) {
tv.tb.is_wordwrap = state
tv.sync_text_pos()
tv.refresh_visible_lines()
tv.update_lines()
tv.sync_text_lines()
}
pub fn (mut tv TextView) switch_wordwrap() {
tv.set_wordwrap(!tv.tb.is_wordwrap)
}
fn (tv &TextView) line(j int) string {
mut jj := j
if jj < 0 {
jj = 0
} else if jj == tv.tlv.lines.len {
jj = tv.tlv.lines.len - 1
}
return tv.tlv.lines[jj]
}
fn (tv &TextView) current_line() string {
return tv.tlv.lines[tv.tlv.cursor_pos_j]
}
fn (tv &TextView) sel_start_line() string {
return tv.tlv.lines[tv.tlv.sel_start_j]
}
fn (tv &TextView) sel_end_line() string {
return tv.tlv.lines[tv.tlv.sel_end_j]
}
fn (tv &TextView) is_sel_active() bool {
// Make selection drawable in read-only mode too
return (tv.tb.is_focused || tv.tb.read_only) && tv.tb.sel_active && tv.sel_end >= 0 // && tv.sel_start != tv.sel_end
}
fn (mut tv TextView) sync_text_pos() {
tv.cursor_pos = tv.text_pos_at(tv.tlv.cursor_pos_i, tv.tlv.cursor_pos_j)
if tv.tlv.sel_end_j == -1 {
tv.sel_start = 0
tv.sel_end = -1
} else {
tv.sel_start = tv.text_pos_at(tv.tlv.sel_start_i, tv.tlv.sel_start_j)
tv.sel_end = tv.text_pos_at(tv.tlv.sel_end_i, tv.tlv.sel_end_j)
}
}
fn (mut tv TextView) sync_text_lines() {
tv.tlv.cursor_pos_i, tv.tlv.cursor_pos_j = tv.text_line_at(tv.cursor_pos)
if tv.sel_end == -1 {
tv.tlv.sel_start_i, tv.tlv.sel_start_j = 0, -1
tv.tlv.sel_end_i, tv.tlv.sel_end_j = 0, -1
} else {
tv.tlv.sel_start_i, tv.tlv.sel_start_j = tv.text_line_at(tv.sel_start)
tv.tlv.sel_end_i, tv.tlv.sel_end_j = tv.text_line_at(tv.sel_end)
}
}
pub fn (mut tv TextView) visible_lines() {
mut j1, mut j2 := 0, 0
if tv.tb.has_scrollview {
j1 = tv.tb.scrollview.offset_y / tv.line_height
if j1 < 0 {
j1 = 0
}
}
if tv.tb.has_scrollview {
j2 = (tv.tb.scrollview.offset_y + tv.tb.height) / tv.line_height
} else {
j2 = tv.tb.height / tv.line_height
}
jmax := tv.tlv.lines.len - 1
// println("j1 $j1 $jmax")
if j1 > jmax {
j1 = jmax
}
// println("j2 $j2 $jmax")
if j2 > jmax {
j2 = jmax
} else if j2 < 0 {
j2 = 0
}
tv.tlv.from_j, tv.tlv.to_j = j1, j2
tv.update_all_visible_lines()
}
fn (mut tv TextView) refresh_visible_lines() {
tv.tlv.refresh_visible_lines = true
}
fn (mut tv TextView) update_all_visible_lines() {
if tv.tlv.refresh_visible_lines {
// println("visible line")
tv.tlv.from_i.clear()
tv.tlv.to_i.clear()
for j in tv.tlv.from_j .. tv.tlv.to_j + 1 {
tv.tlv.from_i << tv.text_pos_from_x(tv.tlv.lines[j], if tv.tb.has_scrollview {
tv.tb.scrollview.offset_x
} else {
0
})
tv.tlv.to_i << tv.text_pos_from_x(tv.tlv.lines[j],
if tv.tb.has_scrollview { tv.tb.scrollview.offset_x } else { 0 } + tv.tb.width)
}
// refresh_visible_lines done
tv.tlv.refresh_visible_lines = false
}
}
pub fn (mut tv TextView) update_lines() {
if tv.is_wordwrap() && tv.tb.width > 30 { // 30 is the default width when not set
tv.word_wrap_text()
} else {
tv.tlv.lines = (*tv.text).split('\n')
}
// TO BE DONE AFTER newly created tv.tlv.lines
tv.visible_lines()
// println(tv.tlv.lines)
tv.sync_text_lines()
tv.update_left_margin()
scrollview_update(tv.tb)
}
fn (mut tv TextView) update_left_margin() {
tv.left_margin = textview_margin
if tv.tb.is_line_number {
tv.left_margin += textview_margin + tv.text_width(tv.tlv.lines.len.str())
}
}
fn (mut tv TextView) scroll_changed() {
// println("textbox scroll changed ${time.now()}")
tv.refresh_visible_lines()
tv.update_lines()
}
fn (mut tv TextView) draw_device_textlines(d DrawDevice) {
if tv.tb.is_sync {
tv.refresh_visible_lines()
tv.update_lines()
}
tv.load_style()
// draw selection
tv.draw_device_selection(d)
// draw only visible text lines
mut y := tv.tb.y + textbox_padding_y
if tv.tb.has_scrollview {
y += (tv.tlv.from_j) * tv.line_height
}
// TODO: only parse chunks when resizing or scrolling
tv.sh.reset_chunks()
for j, line in tv.tlv.lines[tv.tlv.from_j..(tv.tlv.to_j + 1)] {
tv.draw_device_visible_line(d, j, y, line)
if tv.tb.is_line_number {
tv.draw_device_line_number(d, j, y)
}
tv.sh.parse_chunks(j, y, line)
y += tv.line_height
}
tv.sh.draw_device_chunks(d)
// draw cursor
// println("$tv.tb.is_focused && ${!tv.tb.read_only} && $tv.tb.ui.show_cursor && ${!tv.is_sel_active()}")
if tv.tb.is_focused && !tv.tb.read_only && tv.tb.ui.show_cursor && !tv.is_sel_active() {
d.draw_rect_filled(tv.cursor_x(), tv.cursor_y(), 1, tv.line_height, gx.black) // , gx.Black)
}
}
pub fn (mut tv TextView) draw_device_visible_line(d DrawDevice, j int, y int, text string) {
if j == tv.tlv.from_i.len {
// println("draw_visible_line $i $tv.tlv.from_i.len")
tv.refresh_visible_lines()
tv.visible_lines()
}
imin, imax := tv.tlv.from_i[j] or { 0 }, tv.tlv.to_i[j] or { tv.tlv.to_i.len - 1 }
ustr := text.runes()
// println("draw visible $imin, $imax $ustr")
tv.draw_device_styled_text(d, tv.tb.x + tv.left_margin + tv.text_width(ustr#[0..imin].string()),
y, ustr#[imin..imax].string())
}
fn (mut tv TextView) draw_device_selection(d DrawDevice) {
if !tv.is_sel_active() {
// println("return draw_sel")
return
}
if tv.tlv.sel_start_j == tv.tlv.sel_end_j {
// if on the same line draw the selected background
sel_from, sel_width := tv.text_xminmax_from_pos(tv.sel_start_line(), tv.tlv.sel_start_i,
tv.tlv.sel_end_i)
d.draw_rect_filled(tv.tb.x + tv.left_margin + sel_from, tv.tb.y + textbox_padding_y +
tv.tlv.sel_start_j * tv.line_height, sel_width, tv.line_height, selection_color)
} else {
// otherwise draw all the selected lines one by one after sorting the position
start_i, end_i, start_j, end_j := tv.ordered_lines_selection()
// here the first line
mut ustr := tv.line(start_j)
mut sel_from, mut sel_width := tv.text_xminmax_from_pos(ustr, start_i, ustr.len)
d.draw_rect_filled(tv.tb.x + tv.left_margin + sel_from, tv.tb.y + textbox_padding_y +
start_j * tv.line_height, sel_width, tv.line_height, selection_color)
// then all the intermediate lines
if end_j - start_j > 1 {
for j in (start_j + 1) .. end_j {
ustr = tv.line(j)
sel_from, sel_width = tv.text_xminmax_from_pos(ustr, 0, ustr.runes().len)
d.draw_rect_filled(tv.tb.x + tv.left_margin + sel_from, tv.tb.y +
textbox_padding_y + j * tv.line_height, sel_width, tv.line_height,
selection_color)
}
}
// and finally the last one
ustr = tv.line(end_j)
sel_from, sel_width = tv.text_xminmax_from_pos(ustr, 0, end_i)
d.draw_rect_filled(tv.tb.x + tv.left_margin + sel_from, tv.tb.y + textbox_padding_y +
end_j * tv.line_height, sel_width, tv.line_height, selection_color)
}
}
fn (tv &TextView) draw_device_line_number(d DrawDevice, i int, y int) {
tv.draw_device_styled_text(d, tv.tb.x + textview_margin, y, (tv.tlv.from_j + i + 1).str(),
color: gx.gray
)
}
fn (mut tv TextView) insert(s string) {
mut ustr := tv.text.runes()
ustr.insert(tv.cursor_pos, s.runes())
unsafe {
*tv.text = ustr.string()
}
tv.refresh_visible_lines()
tv.update_lines()
}
fn (mut tv TextView) delete_cur_char() {
mut ustr := tv.text.runes()
ustr.delete(tv.cursor_pos)
unsafe {
*tv.text = ustr.string()
}
tv.refresh_visible_lines()
tv.update_lines()
}
fn (mut tv TextView) delete_prev_char() {
if tv.cursor_pos <= 0 {
tv.cursor_pos = 0
return
}
mut ustr := tv.text.runes()
tv.cursor_pos--
ustr.delete(tv.cursor_pos)
unsafe {
*tv.text = ustr.string()
}
tv.refresh_visible_lines()
tv.update_lines()
}
fn (mut tv TextView) delete_prev_word() {
if tv.cursor_pos <= 0 {
tv.cursor_pos = 0
return
}
mut ustr := tv.text.runes()
// Delete until previous whitespace
// TODO!!!!
// mut i := tv.cursor_pos
// for {
// if i > 0 {
// i--
// }
// if text[i].is_space() || i == 0 {
// // unsafe { *tb.text = u[..i) + u.right(tb.cursor_pos_i]}
// break
// }
// }
// tb.cursor_pos_i = i
tv.cursor_pos--
ustr.delete(tv.cursor_pos)
unsafe {
*tv.text = ustr.string()
}
tv.refresh_visible_lines()
tv.update_lines()
}
fn (mut tv TextView) delete_selection() {
// tv.info()
if tv.sel_start > tv.sel_end {
tv.sel_start, tv.sel_end = tv.sel_end, tv.sel_start
}
mut ustr := tv.text.runes()
ustr.delete_many(tv.sel_start, tv.sel_end - tv.sel_start)
tv.cursor_pos = tv.sel_start
tv.sel_end = -1
unsafe {
*tv.text = ustr.string()
}
tv.refresh_visible_lines()
tv.update_lines()
mut tb := tv.tb
// Only if scrollview become inactive, reset the scrollview
scrollview_reset(mut tb)
tv.cancel_selection()
}
fn (mut tv TextView) start_selection(x int, y int) {
// println('start selection: ($x, $y)')
if y <= 0 {
tv.tlv.cursor_pos_j = 0
} else {
tv.tlv.cursor_pos_j = y / tv.line_height
if tv.tlv.cursor_pos_j > tv.tlv.lines.len - 1 {
tv.tlv.cursor_pos_j = tv.tlv.lines.len - 1
}
}
tv.tlv.cursor_pos_i = tv.text_pos_from_x(tv.current_line(), x)
if tv.tb.dragging {
tv.tlv.sel_start_i, tv.tlv.sel_start_j = tv.tlv.cursor_pos_i, tv.tlv.cursor_pos_j
// put sel_end at the sel_start position too to make selection active
tv.tlv.sel_end_i, tv.tlv.sel_end_j = tv.tlv.cursor_pos_i, tv.tlv.cursor_pos_j
}
tv.sync_text_pos()
tv.visible_lines()
// tv.info()
}
fn (mut tv TextView) end_selection(x int, y int) {
// println('end selection: ($x, $y)')
if y <= 0 {
tv.tlv.sel_end_j = 0
} else {
tv.tlv.sel_end_j = y / tv.line_height
if tv.tlv.sel_end_j > tv.tlv.lines.len - 1 {
tv.tlv.sel_end_j = tv.tlv.lines.len - 1
}
}
tv.tlv.sel_end_i = tv.text_pos_from_x(tv.tlv.lines[tv.tlv.sel_end_j], x)
tv.sync_text_pos()
// tv.info()
// println('$tv.sel_end ($tv.tlv.sel_end_i,$tv.tlv.sel_end_j)')
}
pub fn (mut tv TextView) extend_selection(x int, y int) {
if y <= 0 {
tv.tlv.cursor_pos_j = 0
} else {
tv.tlv.cursor_pos_j = y / tv.line_height
if tv.tlv.cursor_pos_j > tv.tlv.lines.len - 1 {
tv.tlv.cursor_pos_j = tv.tlv.lines.len - 1
}
}
tv.tlv.cursor_pos_i = tv.text_pos_from_x(tv.current_line(), x)
tv.sync_text_pos()
if tv.tb.twosided_sel { // extend from both sides
// tv.sel_start and tv.sel_end can and have to be sorted
tv.sel_start, tv.sel_end = tv.ordered_pos_selection()
if tv.cursor_pos < tv.sel_start {
tv.sel_start = tv.cursor_pos
} else if tv.cursor_pos > tv.sel_end {
tv.sel_end = tv.cursor_pos
}
} else {
tv.sel_end = tv.cursor_pos
}
tv.sync_text_lines()
}
pub fn (mut tv TextView) cancel_selection() {
tv.sel_start = 0
tv.sel_end = -1
tv.tb.sel_active = false
tv.sync_text_lines()
}
pub fn (mut tv TextView) move_cursor(side Side) {
match side {
.left {
tv.cursor_pos--
if tv.cursor_pos < 0 {
tv.cursor_pos = 0
}
tv.sync_text_lines()
}
.right {
tv.cursor_pos++
ustr := tv.text.runes()
if tv.cursor_pos > ustr.len {
tv.cursor_pos = ustr.len
}
tv.sync_text_lines()
}
.top {
tv.tlv.cursor_pos_j--
if tv.tlv.cursor_pos_j < 0 {
tv.tlv.cursor_pos_j = 0
}
ustr := tv.current_line().runes()
if ustr.len == 0 {
tv.tlv.cursor_pos_i = 0
} else if tv.tlv.cursor_pos_i >= ustr.len {
tv.tlv.cursor_pos_i = ustr.len - 1
}
tv.sync_text_pos()
}
.bottom {
tv.tlv.cursor_pos_j++
if tv.tlv.cursor_pos_j >= tv.tlv.lines.len {
tv.tlv.cursor_pos_j = tv.tlv.lines.len - 1
}
ustr := tv.current_line().runes()
if tv.tlv.cursor_pos_i > ustr.len {
tv.tlv.cursor_pos_i = ustr.len
}
tv.sync_text_pos()
}
}
}
pub fn (mut tv TextView) cursor_allways_visible() {
if !tv.tb.has_scrollview {
return
}
// vertically
if tv.tlv.cursor_pos_j <= tv.tlv.from_j {
tv.scroll_y_to_cursor(false)
} else if tv.tlv.cursor_pos_j >= tv.tlv.to_j {
tv.scroll_y_to_cursor(true)
}
// horizontally
ustr := tv.tlv.lines[tv.tlv.cursor_pos_j].runes()
ulen := tv.text_width(ustr[..(tv.tlv.cursor_pos_i)].string())
if ulen <= tv.tb.scrollview.offset_x {
tv.scroll_x_to_cursor(false)
} else if ulen >= tv.tb.scrollview.offset_x + tv.tb.width - scrollbar_size {
tv.scroll_x_to_cursor(true)
}
}
fn (mut tv TextView) key_char(e &KeyEvent) {
// println('key char $e')
// s := utf32_to_str(e.codepoint)
s := if e.mods == .ctrl { rune(96 + e.codepoint).str() } else { utf32_to_str(e.codepoint) }
// println('tv key_down $e <$e.key> ${int(e.codepoint)} <$s>')
// wui := tv.tb.ui
// println('${wui.dd.pressed_keys_edge[int(Key.left_control)]}')
if int(e.codepoint) !in [0, 9, 13, 27, 127] && e.mods !in [.ctrl, .super] {
if tv.tb.read_only {
return
}
// println("insert multi ${int(e.codepoint)}")
if tv.is_sel_active() {
tv.delete_selection()
}
Focusable(tv.tb).lock_focus()
tv.insert(s)
tv.cursor_pos++
tv.sync_text_lines()
} else if e.mods in [.ctrl, .super] {
// WORKAROUND to deal with international keyboard
// println('key_char: <$s> <$e.mods> <$e.codepoint> <$e>')
match s {
'a' {
tv.do_select_all()
}
'c' {
tv.do_copy()
}
'v' {
tv.do_paste()
}
'x' {
tv.do_cut()
}
'-' {
tv.do_zoom_down()
}
'=', '+' {
tv.do_zoom_up()
}
else {}
}
}
// println(e.key)
// println('mods=$e.mods')
defer {
if tv.tb.on_change != TextBoxFn(0) {
if e.key == .backspace {
tv.tb.on_change(tv.tb)
}
}
}
// println("tb key_down $e.key ${int(e.codepoint)}")
if tv.tb.read_only {
return
}
tv.cursor_allways_visible()
}
fn (mut tv TextView) key_down(e &KeyEvent) {
// println('tv key down $e')
// println('key_down: $e.key mods=$e.mods')
defer {
if tv.tb.on_change != TextBoxFn(0) {
if e.key == .backspace {
tv.tb.on_change(tv.tb)
}
}
}
// println("tb key_down $e.key ${int(e.codepoint)}")
if tv.tb.read_only {
return
}
match e.key {
.enter {
// println('enter $tv.tb.id')
tv.insert('\n')
tv.cursor_pos++
tv.sync_text_lines()
tv.cursor_adjust_after_newline()
tv.cursor_allways_visible()
}
.tab {
// println("tab multi")
if !tv.tb.ui.window.unlocked_focus() {
if tv.is_sel_active() {
tv.do_indent(e.mods == .shift)
} else {
tv.insert(' ')
tv.cursor_pos += 2
}
tv.sync_text_lines()
tv.cursor_adjust_after_newline()
tv.cursor_allways_visible()
}
}
.backspace {
tv.tb.ui.show_cursor = true
// println('backspace cursor_pos=($tv.tlv.cursor_pos_i, $tv.tlv.cursor_pos_j) len=${(*tv.text).len} \n <${*tv.text}>')
if *tv.text == '' {
return
}
// Delete the entire selection
if tv.is_sel_active() {
tv.delete_selection()
} else if e.mods in [.super, .ctrl] {
// Delete until previous whitespace
// mut i := tv.tlv.cursor_pos_i
// for {
// if i > 0 {
// i--
// }
// if text[i].is_space() || i == 0 {
// // unsafe { *tb.text = u[..i) + u.right(tb.cursor_pos_i]}
// break
// }
// }
// tb.cursor_pos_i = i
} else {
// Delete just one character
tv.delete_prev_char()
}
tv.cursor_allways_visible()
}
.delete {
tv.tb.ui.show_cursor = true
tv.delete_cur_char()
tv.cursor_allways_visible()
}
.left, .right, .up, .down {
dir := match e.key {
.left { Side.left }
.right { Side.right }
.up { Side.top }
else { Side.bottom }
}
if shift_key(e.mods) {
if !tv.is_sel_active() {
tv.tb.sel_active = true
tv.sel_start = tv.cursor_pos
tv.tb.ui.show_cursor = false
}
tv.move_cursor(dir)
tv.sel_end = tv.cursor_pos
tv.sync_text_lines()
} else {
tv.cancel_selection()
tv.tb.ui.show_cursor = true // always show cursor when moving it (left, right, backspace etc)
tv.move_cursor(dir)
}
tv.cursor_allways_visible()
}
.escape {
if tv.tb.ui.window.unlocked_focus() {
// allow to use tab inside textbox
Focusable(tv.tb).lock_focus()
} else {
if !tv.is_sel_active() {
Focusable(tv.tb).unlock_focus()
}
tv.cancel_selection()
tv.tb.ui.show_cursor = true
}
}
else {}
}
}
pub fn (mut tv TextView) do_indent(shift bool) {
if tv.is_sel_active() {
cursor_pos := tv.cursor_pos
for j in tv.tlv.sel_start_j .. (tv.tlv.sel_end_j + 1) {
tv.tlv.cursor_pos_i, tv.tlv.cursor_pos_j = 0, j
tv.sync_text_pos()
if shift {
if tv.tlv.lines[j][..2] == ' ' {
tv.sel_end -= 2
tv.delete_cur_char()
tv.delete_cur_char()
}
} else {
tv.sel_end += 2
tv.insert(' ')
}
}
tv.cursor_pos = cursor_pos
tv.sync_text_lines()
}
}
pub fn (mut tv TextView) do_select_all() {
if tv.tb.read_only && !tv.tb.is_selectable {
return
}
tv.sel_start = 0
tv.sel_end = tv.text.runes().len
tv.sync_text_lines()
tv.tb.ui.show_cursor = false
tv.tb.sel_active = true
return
}
pub fn (mut tv TextView) do_copy() {
if tv.is_sel_active() {
ustr := tv.text.runes()
sel_start, sel_end := tv.ordered_pos_selection()
tv.tb.ui.clipboard.copy(ustr[sel_start..sel_end].string())
}
}
pub fn (mut tv TextView) do_paste() {
if tv.tb.read_only {
return
}
tv.insert(tv.tb.ui.clipboard.paste())
}
pub fn (mut tv TextView) do_cut() {
if tv.tb.read_only {
return
}
if tv.is_sel_active() {
ustr := tv.text.runes()
sel_start, sel_end := tv.ordered_pos_selection()
tv.tb.ui.clipboard.copy(ustr[sel_start..sel_end].string())
tv.delete_selection()
}
}
pub fn (mut tv TextView) do_zoom_down() {
if tv.tb.read_only && !tv.tb.is_selectable {
return
}
mut text_size := DrawTextWidget(tv.tb).font_size()
text_size -= 2
if text_size < 8 {
text_size = 8
}
tv.update_style(size: text_size)
tv.update_line_height()
tv.refresh_visible_lines()
tv.update_lines()
}
pub fn (mut tv TextView) do_zoom_up() {
if tv.tb.read_only && !tv.tb.is_selectable {
return
}
mut text_size := DrawTextWidget(tv.tb).font_size()
text_size += 2
if text_size > 48 {
text_size = 48
}
tv.update_style(size: text_size)
tv.update_line_height()
tv.refresh_visible_lines()
tv.update_lines()
}
@[params]
pub struct LogViewParams {
nb_lines int = 5
}
pub fn (mut tv TextView) do_logview(cfg LogViewParams) {
if !tv.tb.has_scrollview {
println("Warning: use of task do_logview requires textbox to have 'scrollview: true'")
return
}
if tv.tlv.to_j + cfg.nb_lines > tv.tlv.lines.len {
tv.scroll_y_to_end()
tv.tb.ui.refresh()
}
}
fn (tv &TextView) cursor_y() int {
return tv.tb.y + textbox_padding_y + tv.tlv.cursor_pos_j * tv.line_height
}
fn (tv &TextView) cursor_x() int {
ustr := tv.current_line().runes()
mut cursor_x := tv.tb.x + tv.left_margin
if ustr.len > 0 {
left := ustr[..tv.tlv.cursor_pos_i].string()
cursor_x += tv.text_width(left)
}
return cursor_x
}
fn (tv &TextView) cursor_xy() (int, int) {
return tv.cursor_x(), tv.cursor_y()
}
pub fn (mut tv TextView) cursor_adjust_after_newline() {
if tv.tb.has_scrollview {
if tv.tb.scrollview.active_y
&& !tv.tb.scrollview.point_inside(tv.cursor_x(), tv.cursor_y() + tv.line_height, .view) {
tv.tb.scrollview.inc(tv.line_height, .btn_y)
}
}
}
pub fn (mut tv TextView) scroll_x_to_cursor(end bool) {
if tv.tb.scrollview.active_x {
delta := if end { tv.tb.width - 2 * scrollbar_size } else { 0 }
ustr := tv.tlv.lines[tv.tlv.cursor_pos_j].runes()
ulen := tv.text_width(ustr[..tv.tlv.cursor_pos_i].string())
tv.tb.scrollview.set(ulen - delta, .btn_x)
}
}
pub fn (mut tv TextView) scroll_y_to_cursor(end bool) {
if tv.tb.scrollview.active_y {
delta := if end { tv.tb.height - tv.line_height / 2 - tv.line_height } else { 0 }
tv.tb.scrollview.set(tv.tlv.cursor_pos_j * tv.line_height - delta, .btn_y)
}
}
pub fn (mut tv TextView) scroll_y_to_end() {
if tv.tb.scrollview.active_y {
tv.tb.scrollview.set((tv.tlv.lines.len) * tv.line_height, .btn_y)
}
}
fn (mut tv TextView) word_wrap_text() {
if tv.tb.text != unsafe { nil } {
lines := (*tv.tb.text).split('\n')
mut word_wrapped_lines := []string{}
// println('word_wrap_text: $tv.tlv.from_j -> $tv.tlv.to_j')
for line in lines {
ww_lines := tv.word_wrap_line(line)
word_wrapped_lines << ww_lines
}
// println('tl: $lines \n $word_wrapped_lines.len $word_wrapped_lines')
tv.tlv.lines = word_wrapped_lines
}
}
fn (tv &TextView) word_wrap_line(s string) []string {
if s == '' {
return ['']
}
words := s.split(' ')
max_line_width := tv.tb.width
// println("max_line_width = $max_line_width")
mut line := ''
mut line_width := 0.0
mut text_lines := []string{}
for i, word in words {
if i == 0 { // at least the first
line = word
line_width = tv.text_width_additive(word)
} else {
word_width := tv.text_width_additive(' ' + word)
if line_width + word_width < max_line_width - wordwrap_border {
line += ' ' + word
line_width += word_width
} else {
text_lines << line
line = word
line_width = word_width
}
}
}
// println('line_Width = ${line_width} (${s})')
if line_width > 0 {
text_lines << line
}
return text_lines
}
// get text position from row i and column j
pub fn (tv &TextView) text_pos_at(i int, j int) int {
mut pos := 0
lines := tv.tlv.lines
jj := if j >= lines.len { lines.len } else { j }
for k in 0 .. jj {
pos += lines[k].runes().len + 1 // +1 for \n or space
}
pos += i
// if pos < 0 {
// pos = 0
// } else if pos > tv.text.len - 1 {
// pos = tv.text.len - 1
// }
// println('text_lines_pos_at: ($i, $j) -> $pos ')
return pos
}
// get row and column from text position
pub fn (tv &TextView) text_line_at(pos int) (int, int) {
if pos == 0 {
return 0, 0
}
lines := tv.tlv.lines
mut i, mut j := 0, 0
mut total_len, mut ustr_len := 0, 0
for line in lines {
ustr_len = line.runes().len + 1 // +1 is the return last char
total_len += ustr_len
if pos > total_len {
j++
} else {
total_len -= ustr_len
break
}
}
i = pos - total_len
if i > tv.line(j).runes().len {
// IMPORTANT: go to the beginning of the next line
j++
i = 0
}
// println('text_lines_row_column_at: $pos -> ($i, $j)')
return i, j
}
fn (tv &TextView) ordered_pos_selection() (int, int) {
return if tv.sel_start < tv.sel_end {
tv.sel_start, tv.sel_end
} else {
tv.sel_end, tv.sel_start
}
}
fn (tv &TextView) ordered_lines_selection() (int, int, int, int) {
return if tv.tlv.sel_start_j < tv.tlv.sel_end_j {
tv.tlv.sel_start_i, tv.tlv.sel_end_i, tv.tlv.sel_start_j, tv.tlv.sel_end_j
} else {
tv.tlv.sel_end_i, tv.tlv.sel_start_i, tv.tlv.sel_end_j, tv.tlv.sel_start_j
}
}
pub fn (tv &TextView) text_xminmax_from_pos(text string, x1 int, x2 int) (int, int) {
tv.load_style()
ustr := text.runes()
mut x_min, mut x_max := if x1 < x2 { x1, x2 } else { x2, x1 }
if x_max > ustr.len {
// println('warning: text_xminmax_from_pos $x_max > $ustr.len')
x_max = ustr.len
}
if x_min < 0 {
// println('warning: text_xminmax_from_pos $x_min < 0')
x_min = 0
}
// println("xminmax: ${ustr.len} $x_min $x_max")
left := ustr[..x_min].string()
right := ustr[x_max..].string()
ww, lw, rw := tv.text_width(text), tv.text_width(left), tv.text_width(right)
return lw, ww - lw - rw
}