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// Scintilla source code edit control
/** @file Indicator.cxx
** Defines the style of indicators which are text decorations such as underlining.
**/
// Copyright 1998-2001 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.
#include <vector>
#include <map>
#include "Platform.h"
#include "Scintilla.h"
#include "XPM.h"
#include "Indicator.h"
#ifdef SCI_NAMESPACE
using namespace Scintilla;
#endif
static PRectangle PixelGridAlign(const PRectangle &rc) {
// Move left and right side to nearest pixel to avoid blurry visuals
return PRectangle(int(rc.left + 0.5), rc.top, int(rc.right + 0.5), rc.bottom);
}
void Indicator::Draw(Surface *surface, const PRectangle &rc, const PRectangle &rcLine) {
surface->PenColour(fore);
int ymid = (rc.bottom + rc.top) / 2;
if (style == INDIC_SQUIGGLE) {
int x = int(rc.left+0.5);
int xLast = int(rc.right+0.5);
int y = 0;
surface->MoveTo(x, rc.top + y);
while (x < xLast) {
if ((x + 2) > xLast) {
if (xLast > x)
y = 1;
x = xLast;
} else {
x += 2;
y = 2 - y;
}
surface->LineTo(x, rc.top + y);
}
} else if (style == INDIC_SQUIGGLEPIXMAP) {
PRectangle rcSquiggle = PixelGridAlign(rc);
int width = Platform::Minimum(4000, rcSquiggle.Width());
RGBAImage image(width, 3, 1.0, 0);
enum { alphaFull = 0xff, alphaSide = 0x2f, alphaSide2=0x5f };
for (int x = 0; x < width; x++) {
if (x%2) {
// Two halfway columns have a full pixel in middle flanked by light pixels
image.SetPixel(x, 0, fore, alphaSide);
image.SetPixel(x, 1, fore, alphaFull);
image.SetPixel(x, 2, fore, alphaSide);
} else {
// Extreme columns have a full pixel at bottom or top and a mid-tone pixel in centre
image.SetPixel(x, (x%4) ? 0 : 2, fore, alphaFull);
image.SetPixel(x, 1, fore, alphaSide2);
}
}
surface->DrawRGBAImage(rcSquiggle, image.GetWidth(), image.GetHeight(), image.Pixels());
} else if (style == INDIC_SQUIGGLELOW) {
surface->MoveTo(rc.left, rc.top);
int x = rc.left + 3;
int y = 0;
while (x < rc.right) {
surface->LineTo(x-1, rc.top + y);
y = 1 - y;
surface->LineTo(x, rc.top + y);
x += 3;
}
surface->LineTo(rc.right, rc.top + y); // Finish the line
} else if (style == INDIC_TT) {
surface->MoveTo(rc.left, ymid);
int x = rc.left + 5;
while (x < rc.right) {
surface->LineTo(x, ymid);
surface->MoveTo(x-3, ymid);
surface->LineTo(x-3, ymid+2);
x++;
surface->MoveTo(x, ymid);
x += 5;
}
surface->LineTo(rc.right, ymid); // Finish the line
if (x - 3 <= rc.right) {
surface->MoveTo(x-3, ymid);
surface->LineTo(x-3, ymid+2);
}
} else if (style == INDIC_DIAGONAL) {
int x = rc.left;
while (x < rc.right) {
surface->MoveTo(x, rc.top+2);
int endX = x+3;
int endY = rc.top - 1;
if (endX > rc.right) {
endY += endX - rc.right;
endX = rc.right;
}
surface->LineTo(endX, endY);
x += 4;
}
} else if (style == INDIC_STRIKE) {
surface->MoveTo(rc.left, rc.top - 4);
surface->LineTo(rc.right, rc.top - 4);
} else if (style == INDIC_HIDDEN) {
// Draw nothing
} else if (style == INDIC_BOX) {
surface->MoveTo(rc.left, ymid+1);
surface->LineTo(rc.right, ymid+1);
surface->LineTo(rc.right, rcLine.top+1);
surface->LineTo(rc.left, rcLine.top+1);
surface->LineTo(rc.left, ymid+1);
} else if (style == INDIC_ROUNDBOX || style == INDIC_STRAIGHTBOX) {
PRectangle rcBox = rcLine;
rcBox.top = rcLine.top + 1;
rcBox.left = rc.left;
rcBox.right = rc.right;
surface->AlphaRectangle(rcBox, (style == INDIC_ROUNDBOX) ? 1 : 0, fore, fillAlpha, fore, outlineAlpha, 0);
} else if (style == INDIC_DOTBOX) {
PRectangle rcBox = PixelGridAlign(rc);
rcBox.top = rcLine.top + 1;
rcBox.bottom = rcLine.bottom;
// Cap width at 4000 to avoid large allocations when mistakes made
int width = Platform::Minimum(rcBox.Width(), 4000);
RGBAImage image(width, rcBox.Height(), 1.0, 0);
// Draw horizontal lines top and bottom
for (int x=0; x<width; x++) {
for (int y=0; y<rcBox.Height(); y += rcBox.Height()-1) {
image.SetPixel(x, y, fore, ((x + y) % 2) ? outlineAlpha : fillAlpha);
}
}
// Draw vertical lines left and right
for (int y=1; y<rcBox.Height(); y++) {
for (int x=0; x<width; x += width-1) {
image.SetPixel(x, y, fore, ((x + y) % 2) ? outlineAlpha : fillAlpha);
}
}
surface->DrawRGBAImage(rcBox, image.GetWidth(), image.GetHeight(), image.Pixels());
} else if (style == INDIC_DASH) {
int x = rc.left;
while (x < rc.right) {
surface->MoveTo(x, ymid);
surface->LineTo(Platform::Minimum(x + 4, rc.right), ymid);
x += 7;
}
} else if (style == INDIC_DOTS) {
int x = rc.left;
while (x < rc.right) {
PRectangle rcDot(x, ymid, x+1, ymid+1);
surface->FillRectangle(rcDot, fore);
x += 2;
}
} else { // Either INDIC_PLAIN or unknown
surface->MoveTo(rc.left, ymid);
surface->LineTo(rc.right, ymid);
}
}