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text_editor: add magnet cursor position (#6843)

pull/6848/head
Larpon 2020-11-16 13:51:39 +01:00 committed by GitHub
parent ac8a2ff12d
commit 0c54ebdf41
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1 changed files with 16 additions and 0 deletions
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16
examples/term.ui/text_editor.v
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@ -31,6 +31,7 @@ mut:
files []string
status string
t int
magnet_x int
footer_height int = 2
viewport int
}
@ -456,6 +457,17 @@ fn (a &App) view_height() int {
return a.tui.window_height - a.footer_height - 1
}
// magnet_cursor_x will place the cursor as close to it's last move left or right as possible
fn (mut a App) magnet_cursor_x() {
mut buffer := a.ed
if buffer.cursor.pos_x < a.magnet_x {
if a.magnet_x < buffer.cur_line().len {
move_x := a.magnet_x - buffer.cursor.pos_x
buffer.move_cursor(move_x, .right)
}
}
}
fn frame(x voidptr) {
mut a := &App(x)
mut ed := a.ed
@ -494,6 +506,7 @@ fn event(e &tui.Event, x voidptr) {
} else if e.modifiers == 0 {
buffer.move_cursor(1, .left)
}
a.magnet_x = buffer.cursor.pos_x
}
.right {
if e.modifiers == tui.ctrl {
@ -501,12 +514,15 @@ fn event(e &tui.Event, x voidptr) {
} else if e.modifiers == 0 {
buffer.move_cursor(1, .right)
}
a.magnet_x = buffer.cursor.pos_x
}
.up {
buffer.move_cursor(1, .up)
a.magnet_cursor_x()
}
.down {
buffer.move_cursor(1, .down)
a.magnet_cursor_x()
}
.page_up {
buffer.move_cursor(a.view_height(), .page_up)