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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 <stdexcept>
#include <vector>
#include <map>
#include "Platform.h"
#include "Scintilla.h"
#include "Indicator.h"
#include "XPM.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::FromInts(int(rc.left + 0.5), int(rc.top), int(rc.right + 0.5), int(rc.bottom));
}
void Indicator::Draw(Surface *surface, const PRectangle &rc, const PRectangle &rcLine, const PRectangle &rcCharacter, DrawState drawState, int value) const {
StyleAndColour sacDraw = sacNormal;
if (Flags() & SC_INDICFLAG_VALUEFORE) {
sacDraw.fore = value & SC_INDICVALUEMASK;
}
if (drawState == drawHover) {
sacDraw = sacHover;
}
surface->PenColour(sacDraw.fore);
int ymid = static_cast<int>(rc.bottom + rc.top) / 2;
if (sacDraw.style == INDIC_SQUIGGLE) {
int x = int(rc.left+0.5);
int xLast = int(rc.right+0.5);
int y = 0;
surface->MoveTo(x, static_cast<int>(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, static_cast<int>(rc.top) + y);
}
} else if (sacDraw.style == INDIC_SQUIGGLEPIXMAP) {
PRectangle rcSquiggle = PixelGridAlign(rc);
int width = Platform::Minimum(4000, static_cast<int>(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, sacDraw.fore, alphaSide);
image.SetPixel(x, 1, sacDraw.fore, alphaFull);
image.SetPixel(x, 2, sacDraw.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, sacDraw.fore, alphaFull);
image.SetPixel(x, 1, sacDraw.fore, alphaSide2);
}
}
surface->DrawRGBAImage(rcSquiggle, image.GetWidth(), image.GetHeight(), image.Pixels());
} else if (sacDraw.style == INDIC_SQUIGGLELOW) {
surface->MoveTo(static_cast<int>(rc.left), static_cast<int>(rc.top));
int x = static_cast<int>(rc.left) + 3;
int y = 0;
while (x < rc.right) {
surface->LineTo(x - 1, static_cast<int>(rc.top) + y);
y = 1 - y;
surface->LineTo(x, static_cast<int>(rc.top) + y);
x += 3;
}
surface->LineTo(static_cast<int>(rc.right), static_cast<int>(rc.top) + y); // Finish the line
} else if (sacDraw.style == INDIC_TT) {
surface->MoveTo(static_cast<int>(rc.left), ymid);
int x = static_cast<int>(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(static_cast<int>(rc.right), ymid); // Finish the line
if (x - 3 <= rc.right) {
surface->MoveTo(x-3, ymid);
surface->LineTo(x-3, ymid+2);
}
} else if (sacDraw.style == INDIC_DIAGONAL) {
int x = static_cast<int>(rc.left);
while (x < rc.right) {
surface->MoveTo(x, static_cast<int>(rc.top) + 2);
int endX = x+3;
int endY = static_cast<int>(rc.top) - 1;
if (endX > rc.right) {
endY += endX - static_cast<int>(rc.right);
endX = static_cast<int>(rc.right);
}
surface->LineTo(endX, endY);
x += 4;
}
} else if (sacDraw.style == INDIC_STRIKE) {
surface->MoveTo(static_cast<int>(rc.left), static_cast<int>(rc.top) - 4);
surface->LineTo(static_cast<int>(rc.right), static_cast<int>(rc.top) - 4);
} else if ((sacDraw.style == INDIC_HIDDEN) || (sacDraw.style == INDIC_TEXTFORE)) {
// Draw nothing
} else if (sacDraw.style == INDIC_BOX) {
surface->MoveTo(static_cast<int>(rc.left), ymid + 1);
surface->LineTo(static_cast<int>(rc.right), ymid + 1);
surface->LineTo(static_cast<int>(rc.right), static_cast<int>(rcLine.top) + 1);
surface->LineTo(static_cast<int>(rc.left), static_cast<int>(rcLine.top) + 1);
surface->LineTo(static_cast<int>(rc.left), ymid + 1);
} else if (sacDraw.style == INDIC_ROUNDBOX ||
sacDraw.style == INDIC_STRAIGHTBOX ||
sacDraw.style == INDIC_FULLBOX) {
PRectangle rcBox = rcLine;
if (sacDraw.style != INDIC_FULLBOX)
rcBox.top = rcLine.top + 1;
rcBox.left = rc.left;
rcBox.right = rc.right;
surface->AlphaRectangle(rcBox, (sacDraw.style == INDIC_ROUNDBOX) ? 1 : 0,
sacDraw.fore, fillAlpha, sacDraw.fore, outlineAlpha, 0);
} else if (sacDraw.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(static_cast<int>(rcBox.Width()), 4000);
RGBAImage image(width, static_cast<int>(rcBox.Height()), 1.0, 0);
// Draw horizontal lines top and bottom
for (int x=0; x<width; x++) {
for (int y = 0; y<static_cast<int>(rcBox.Height()); y += static_cast<int>(rcBox.Height()) - 1) {
image.SetPixel(x, y, sacDraw.fore, ((x + y) % 2) ? outlineAlpha : fillAlpha);
}
}
// Draw vertical lines left and right
for (int y = 1; y<static_cast<int>(rcBox.Height()); y++) {
for (int x=0; x<width; x += width-1) {
image.SetPixel(x, y, sacDraw.fore, ((x + y) % 2) ? outlineAlpha : fillAlpha);
}
}
surface->DrawRGBAImage(rcBox, image.GetWidth(), image.GetHeight(), image.Pixels());
} else if (sacDraw.style == INDIC_DASH) {
int x = static_cast<int>(rc.left);
while (x < rc.right) {
surface->MoveTo(x, ymid);
surface->LineTo(Platform::Minimum(x + 4, static_cast<int>(rc.right)), ymid);
x += 7;
}
} else if (sacDraw.style == INDIC_DOTS) {
int x = static_cast<int>(rc.left);
while (x < static_cast<int>(rc.right)) {
PRectangle rcDot = PRectangle::FromInts(x, ymid, x + 1, ymid + 1);
surface->FillRectangle(rcDot, sacDraw.fore);
x += 2;
}
} else if (sacDraw.style == INDIC_COMPOSITIONTHICK) {
PRectangle rcComposition(rc.left+1, rcLine.bottom-2, rc.right-1, rcLine.bottom);
surface->FillRectangle(rcComposition, sacDraw.fore);
} else if (sacDraw.style == INDIC_COMPOSITIONTHIN) {
PRectangle rcComposition(rc.left+1, rcLine.bottom-2, rc.right-1, rcLine.bottom-1);
surface->FillRectangle(rcComposition, sacDraw.fore);
} else if (sacDraw.style == INDIC_POINT || sacDraw.style == INDIC_POINTCHARACTER) {
if (rcCharacter.Width() >= 0.1) {
const int pixelHeight = static_cast<int>(rc.Height() - 1.0f); // 1 pixel onto next line if multiphase
const XYPOSITION x = (sacDraw.style == INDIC_POINT) ? (rcCharacter.left) : ((rcCharacter.right + rcCharacter.left) / 2);
const int ix = static_cast<int>(x + 0.5f);
const int iy = static_cast<int>(rc.top + 1.0f);
Point pts[] = {
Point::FromInts(ix - pixelHeight, iy + pixelHeight), // Left
Point::FromInts(ix + pixelHeight, iy + pixelHeight), // Right
Point::FromInts(ix, iy) // Top
};
surface->Polygon(pts, 3, sacDraw.fore, sacDraw.fore);
}
} else { // Either INDIC_PLAIN or unknown
surface->MoveTo(static_cast<int>(rc.left), ymid);
surface->LineTo(static_cast<int>(rc.right), ymid);
}
}
void Indicator::SetFlags(int attributes_) {
attributes = attributes_;
}
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