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Fix backspace for good.

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This commit is contained in:
Artyom Shalkhakov 2025-02-21 01:26:24 -07:00
parent a2e8549052
commit ec78acb42a
1 changed files with 27 additions and 18 deletions
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45
neo/libs/ImGuiColorTextEdit/TextEditor.cpp
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@ -2070,6 +2070,30 @@ int TextEditor::ReplaceAll(const char* find, const char* replace, bool matchCase
return replacements;
}
static int GetGlyphWidth(const TextEditor::Line& line, int cindex, int maxColumn, int tabSize)
{
if (line[cindex].mChar == '\t')
{
int c = 0;
int i = 0;
int charWidth = 0;
for (; i < line.size() && i < cindex + 1 && c < maxColumn;)
{
if (line[i].mChar == '\t')
charWidth = ((c / tabSize) * tabSize + tabSize) - c;
else
charWidth = 1;
c += charWidth;
i += UTF8CharLength(line[i].mChar);
}
return charWidth;
}
else
{
return 1;
}
}
void TextEditor::Delete()
{
assert(!mReadOnly);
@ -2186,24 +2210,9 @@ void TextEditor::Backspace()
// --cindex;
u.mRemovedStart = u.mRemovedEnd = GetActualCursorCoordinates();
if (line[cindex].mChar == '\t')
{
if (pos.mColumn == GetLineMaxColumn(pos.mLine))
{
u.mRemovedStart.mColumn -= mTabSize - 1;
mState.mCursorPosition.mColumn -= mTabSize - 1;
}
else
{
u.mRemovedStart.mColumn -= mTabSize;
mState.mCursorPosition.mColumn -= mTabSize;
}
}
else
{
--u.mRemovedStart.mColumn;
--mState.mCursorPosition.mColumn;
}
int width = GetGlyphWidth(line, cindex, mState.mCursorPosition.mColumn, mTabSize);
u.mRemovedStart.mColumn -= width;
mState.mCursorPosition.mColumn -= width;
while (cindex < line.size() && cend-- > cindex)
{