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//========================================================================
//
// MarkedContentOutputDev.cc
//
// This file is licensed under the GPLv2 or later
//
// Copyright 2013 Igalia S.L.
//
//========================================================================
#include "MarkedContentOutputDev.h"
#include "GlobalParams.h"
#include "UnicodeMap.h"
#include "GfxState.h"
#include "GfxFont.h"
#include "Annot.h"
#include <vector>
MarkedContentOutputDev::MarkedContentOutputDev(int mcidA):
currentFont(NULL),
currentText(NULL),
mcid(mcidA),
pageWidth(0.0),
pageHeight(0.0),
unicodeMap(NULL)
{
currentColor.r = currentColor.g = currentColor.b = 0;
}
MarkedContentOutputDev::~MarkedContentOutputDev()
{
if (unicodeMap)
unicodeMap->decRefCnt();
if (currentFont)
currentFont->decRefCnt();
delete currentText;
}
void MarkedContentOutputDev::endSpan()
{
if (currentText && currentText->getLength()) {
// The TextSpan takes ownership of currentText and
// increases the reference count for currentFont.
textSpans.push_back(TextSpan(currentText,
currentFont,
currentColor));
}
currentText = NULL;
}
void MarkedContentOutputDev::startPage(int pageNum, GfxState *state, XRef *xref)
{
if (state) {
pageWidth = state->getPageWidth();
pageHeight = state->getPageHeight();
} else {
pageWidth = pageHeight = 0.0;
}
}
void MarkedContentOutputDev::endPage()
{
pageWidth = pageHeight = 0.0;
}
void MarkedContentOutputDev::beginMarkedContent(char *name, Dict *properties)
{
int id = -1;
if (properties)
properties->lookupInt("MCID", NULL, &id);
if (id == -1)
return;
// The stack keep track of MCIDs of nested marked content.
if (inMarkedContent() || id == mcid)
mcidStack.push_back(id);
}
void MarkedContentOutputDev::endMarkedContent(GfxState *state)
{
if (inMarkedContent()) {
mcidStack.pop_back();
// The outer marked content sequence MCID was popped, ensure
// that the last piece of text collected ends up in a TextSpan.
if (!inMarkedContent())
endSpan();
}
}
bool MarkedContentOutputDev::needFontChange(GfxFont* font) const
{
if (currentFont == font)
return gFalse;
if (!currentFont)
return font != NULL && font->isOk();
if (font == NULL)
return gTrue;
// Two non-null valid fonts are the same if they point to the same Ref
if (currentFont->getID()->num == font->getID()->num &&
currentFont->getID()->gen == font->getID()->gen)
return gFalse;
return gTrue;
}
void MarkedContentOutputDev::drawChar(GfxState *state,
double xx, double yy,
double dx, double dy,
double ox, double oy,
CharCode c, int nBytes,
Unicode *u, int uLen)
{
if (!inMarkedContent() || !uLen)
return;
// Color changes are tracked here so the color can be chosen depending on
// the render mode (for mode 1 stroke color is used), so there is no need
// to implement both updateFillColor() and updateStrokeColor().
GBool colorChange = gFalse;
GfxRGB color;
if ((state->getRender() & 3) == 1)
state->getStrokeRGB(&color);
else
state->getFillRGB(&color);
colorChange = (color.r != currentColor.r ||
color.g != currentColor.g ||
color.b != currentColor.b);
// Check also for font changes.
GBool fontChange = needFontChange(state->getFont());
// Save a span with the current changes.
if (colorChange || fontChange) {
endSpan();
}
// Perform the color/font changes.
if (colorChange)
currentColor = color;
if (fontChange) {
if (currentFont != NULL) {
currentFont->decRefCnt();
currentFont = NULL;
}
if (state->getFont() != NULL) {
currentFont = state->getFont();
currentFont->incRefCnt();
}
}
double sp, dx2, dy2, w1, h1, x1, y1;
// Subtract char and word spacing from the (dx,dy) values
sp = state->getCharSpace();
if (c == (CharCode) 0x20)
sp += state->getWordSpace();
state->textTransformDelta(sp * state->getHorizScaling(), 0, &dx2, &dy2);
dx -= dx2;
dy -= dy2;
state->transformDelta(dx, dy, &w1, &h1);
state->transform(xx, yy, &x1, &y1);
// Throw away characters that are not inside the page boundaries.
if (x1 + w1 < 0 || x1 > pageWidth || y1 + h1 < 0 || y1 > pageHeight)
return;
// Make a sanity check on character size. Note: (x != x) <-> isnan(x)
if (x1 != x1 || y1 != y1 || w1 != w1 || h1 != h1)
return;
for (int i = 0; i < uLen; i++) {
// Soft hyphen markers are skipped, as they are invisible unless
// rendering is done to an actual device and the hyphenation hint
// used. MarkedContentOutputDev extracts the *visible* text content.
if (u[i] != 0x00AD) {
// Add the UTF-8 sequence to the current text span.
if (!unicodeMap)
unicodeMap = globalParams->getTextEncoding();
char buf[8];
int n = unicodeMap->mapUnicode(u[i], buf, sizeof(buf));
if (n > 0) {
if (currentText == NULL)
currentText = new GooString();
currentText->append(buf, n);
}
}
}
}
const TextSpanArray& MarkedContentOutputDev::getTextSpans() const
{
return textSpans;
}
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