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implement part 1 of #267 - tab position marks in editors

This commit is contained in:
Vadim Lopatin 2016-06-08 16:24:29 +03:00
parent 76a631ebff
commit 2f5a481d2e
1 changed files with 46 additions and 27 deletions
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73
src/dlangui/widgets/editors.d
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@ -273,7 +273,7 @@ class EditWidgetBase : ScrollWidgetBase, EditableContentListener, MenuItemAction
@property bool copyCurrentLineWhenNoSelection() { return _copyCurrentLineWhenNoSelection; }
@property EditWidgetBase copyCurrentLineWhenNoSelection(bool flg) { _copyCurrentLineWhenNoSelection = flg; return this; }
protected bool _showTabPositionMarks = true;
protected bool _showTabPositionMarks = false;
/// when true shows mark on tab positions in beginning of line
@property bool showTabPositionMarks() { return _showTabPositionMarks; }
@property EditWidgetBase showTabPositionMarks(bool flg) {
@ -2681,6 +2681,8 @@ class EditBox : EditWidgetBase {
}
void drawWhiteSpaceMarks(DrawBuf buf, ref FontRef font, dstring txt, int tabSize, Rect lineRect, Rect visibleRect) {
// _showTabPositionMarks
// _showWhiteSpaceMarks
int firstNonSpace = -1;
int lastNonSpace = -1;
bool hasTabs = false;
@ -2698,7 +2700,12 @@ class EditBox : EditWidgetBase {
uint color = addAlpha(textColor, 0xC0);
static int[] textSizeBuffer;
int charsMeasured = font.measureText(txt, textSizeBuffer, MAX_WIDTH_UNSPECIFIED, tabSize, 0, 0);
int ts = tabSize;
if (ts < 1)
ts = 1;
if (ts > 8)
ts = 8;
int spaceIndex = 0;
for (int i = 0; i < txt.length && i < charsMeasured; i++) {
dchar ch = txt[i];
bool outsideText = (i < firstNonSpace || i >= lastNonSpace);
@ -2708,30 +2715,42 @@ class EditBox : EditWidgetBase {
rc.right = lineRect.left + textSizeBuffer[i];
int h = rc.height;
if (rc.intersects(visibleRect)) {
// draw space mark
if (ch == ' ') {
// space
int sz = h / 6;
if (sz < 1)
sz = 1;
rc.top += h / 2 - sz / 2;
rc.bottom = rc.top + sz;
rc.left += rc.width / 2 - sz / 2;
rc.right = rc.left + sz;
buf.fillRect(rc, color);
} else if (ch == '\t') {
// tab
Point p1 = Point(rc.left + 1, rc.top + h / 2);
Point p2 = p1;
p2.x = rc.right - 1;
int sz = h / 4;
if (sz < 2)
sz = 2;
if (sz > p2.x - p1.x)
sz = p2.x - p1.x;
buf.drawLine(p1, p2, color);
buf.drawLine(p2, Point(p2.x - sz, p2.y - sz), color);
buf.drawLine(p2, Point(p2.x - sz, p2.y + sz), color);
if (_showTabPositionMarks && i < firstNonSpace) {
if (spaceIndex % ts == 0) {
// draw mark
buf.fillRect(Rect(rc.left, rc.top, rc.left + 1, rc.bottom), color);
}
if (ch == ' ')
spaceIndex++;
else if (ch == '\t')
spaceIndex = (spaceIndex + ts) / ts * ts;
}
if (_showWhiteSpaceMarks) {
// draw space mark
if (ch == ' ') {
// space
int sz = h / 6;
if (sz < 1)
sz = 1;
rc.top += h / 2 - sz / 2;
rc.bottom = rc.top + sz;
rc.left += rc.width / 2 - sz / 2;
rc.right = rc.left + sz;
buf.fillRect(rc, color);
} else if (ch == '\t') {
// tab
Point p1 = Point(rc.left + 1, rc.top + h / 2);
Point p2 = p1;
p2.x = rc.right - 1;
int sz = h / 4;
if (sz < 2)
sz = 2;
if (sz > p2.x - p1.x)
sz = p2.x - p1.x;
buf.drawLine(p1, p2, color);
buf.drawLine(p2, Point(p2.x - sz, p2.y - sz), color);
buf.drawLine(p2, Point(p2.x - sz, p2.y + sz), color);
}
}
}
}
@ -2761,7 +2780,7 @@ class EditBox : EditWidgetBase {
drawLineBackground(buf, _firstVisibleLine + i, lineRect, visibleRect);
if (!txt.length)
continue;
if (_showWhiteSpaceMarks)
if (_showWhiteSpaceMarks || _showTabPositionMarks)
drawWhiteSpaceMarks(buf, font, txt, tabSize, lineRect, visibleRect);
if (_leftPaneWidth > 0) {
Rect leftPaneRect = visibleRect;