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Proper support for double width characters

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Fixes #99
This commit is contained in:
Zachary Yedidia
2016-06-04 16:25:11 -04:00
parent 852bd2c904
commit d6307b2718
3 changed files with 42 additions and 12 deletions
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19
cmd/micro/cursor.go
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@@ -1,9 +1,5 @@
package main
import (
"strings"
)
// FromCharPos converts from a character position to an x, y position
func FromCharPos(loc int, buf *Buffer) (int, int) {
return FromCharPosStart(0, 0, 0, loc, buf)
@@ -357,13 +353,13 @@ func (c *Cursor) GetCharPosInLine(lineNum, visualPos int) int {
// Get the tab size
tabSize := int(settings["tabsize"].(float64))
// This is the visual line -- every \t replaced with the correct number of spaces
visualLine := strings.Replace(c.buf.Lines[lineNum], "\t", "\t"+Spaces(tabSize-1), -1)
if visualPos > Count(visualLine) {
visualPos = Count(visualLine)
visualLineLen := StringWidth(c.buf.Lines[lineNum])
if visualPos > visualLineLen {
visualPos = visualLineLen
}
numTabs := NumOccurences(visualLine[:visualPos], '\t')
if visualPos >= (tabSize-1)*numTabs {
return visualPos - (tabSize-1)*numTabs
width := WidthOfLargeRunes(c.buf.Lines[lineNum])
if visualPos >= width {
return visualPos - width
}
return visualPos / tabSize
}
@@ -371,8 +367,7 @@ func (c *Cursor) GetCharPosInLine(lineNum, visualPos int) int {
// GetVisualX returns the x value of the cursor in visual spaces
func (c *Cursor) GetVisualX() int {
runes := []rune(c.buf.Lines[c.Y])
tabSize := int(settings["tabsize"].(float64))
return c.X + NumOccurences(string(runes[:c.X]), '\t')*(tabSize-1)
return StringWidth(string(runes[:c.X]))
}
// Relocate makes sure that the cursor is inside the bounds of the buffer