FM / layout

/usr/share/doc/libicu-devel/samples/layout/

/usr/share/doc/libicu-devel/samples/layout

Name	Size	Mode	Actions
arraymem.h	646	0644	edit dl rm
cgnomelayout.c	8648	0644	edit dl rm
clayout.c	10060	0644	edit dl rm
cmaps.cpp	5428	0644	edit dl rm
cmaps.h	2106	0644	edit dl rm
FontMap.cpp	7517	0644	edit dl rm
FontMap.GDI	426	0644	edit dl rm
FontMap.Gnome	392	0644	edit dl rm
FontMap.h	1887	0644	edit dl rm
FontTableCache.cpp	2427	0644	edit dl rm
FontTableCache.h	1089	0644	edit dl rm
GDIFontInstance.cpp	9826	0644	edit dl rm
GDIFontInstance.h	3688	0644	edit dl rm
GDIFontMap.cpp	1356	0644	edit dl rm
GDIFontMap.h	1262	0644	edit dl rm
gdiglue.cpp	1707	0644	edit dl rm
gdiglue.h	983	0644	edit dl rm
GDIGUISupport.cpp	862	0644	edit dl rm
GDIGUISupport.h	949	0644	edit dl rm
GnomeFontInstance.cpp	5557	0644	edit dl rm
GnomeFontInstance.h	3880	0644	edit dl rm
GnomeFontMap.cpp	1427	0644	edit dl rm
GnomeFontMap.h	1240	0644	edit dl rm
gnomeglue.cpp	1682	0644	edit dl rm
gnomeglue.h	986	0644	edit dl rm
GnomeGUISupport.cpp	1074	0644	edit dl rm
GnomeGUISupport.h	961	0644	edit dl rm
gnomelayout.cpp	8701	0644	edit dl rm
gsupport.h	370	0644	edit dl rm
GUISupport.h	890	0644	edit dl rm
layout.cpp	10032	0644	edit dl rm
layout.sln	1202	0644	edit dl rm
layout.vcxproj	13234	0644	edit dl rm
layout.vcxproj.filters	3132	0644	edit dl rm
LayoutSample.rc	3450	0644	edit dl rm
Makefile	2983	0644	edit dl rm
Makefile.in	2991	0644	edit dl rm
paragraph.cpp	7765	0644	edit dl rm
paragraph.h	2232	0644	edit dl rm
pflow.c	9490	0644	edit dl rm
pflow.h	940	0644	edit dl rm
readme.html	7500	0644	edit dl rm
RenderingSurface.h	1119	0644	edit dl rm
resource.h	907	0644	edit dl rm
rsurface.cpp	712	0644	edit dl rm
rsurface.h	528	0644	edit dl rm
Sample.txt	1697	0644	edit dl rm
ScriptCompositeFontInstance.cpp	3274	0644	edit dl rm
ScriptCompositeFontInstance.h	6302	0644	edit dl rm
sfnt.h	5021	0644	edit dl rm
Surface.cpp	892	0644	edit dl rm
Surface.h	519	0644	edit dl rm
ucreader.cpp	509	0644	edit dl rm
ucreader.h	422	0644	edit dl rm
UnicodeReader.cpp	4202	0644	edit dl rm
UnicodeReader.h	999	0644	edit dl rm

Edit: /usr/share/doc/libicu-devel/samples/layout/paragraph.cpp (7765B)

/*
 *******************************************************************************
 *
 *   © 2016 and later: Unicode, Inc. and others.
 *   License & terms of use: http://www.unicode.org/copyright.html#License
 *
 *******************************************************************************
 *******************************************************************************
 *
 *   Copyright (C) 1999-2015, International Business Machines
 *   Corporation and others.  All Rights Reserved.
 *
 *******************************************************************************
 *   file name:  Paragraph.cpp
 *
 *   created on: 09/06/2000
 *   created by: Eric R. Mader
 */

#include "unicode/utypes.h"
#include "unicode/uchar.h"
#include "unicode/ubidi.h"
#include "unicode/ustring.h"

#include "layout/ParagraphLayout.h"

#include "RenderingSurface.h"

#include "paragraph.h"
#include "UnicodeReader.h"

#define MARGIN 10
#define LINE_GROW 32
#define PARA_GROW 8

#define CH_LF 0x000A
#define CH_CR 0x000D
#define CH_LSEP 0x2028
#define CH_PSEP 0x2029

static LEUnicode *skipLineEnd(LEUnicode *ptr)
{
    if (ptr[0] == CH_CR && ptr[1] == CH_LF) {
        ptr += 1;
    }

return ptr + 1;
}

static le_int32 findRun(const RunArray *runArray, le_int32 offset)
{
    le_int32 runCount = runArray->getCount();

for (le_int32 run = 0; run < runCount; run += 1) {
        if (runArray->getLimit(run) > offset) {
            return run;
        }
    }

return -1;
}

static void subsetFontRuns(const FontRuns *fontRuns, le_int32 start, le_int32 limit, FontRuns *sub)
{
    le_int32 startRun = findRun(fontRuns, start);
    le_int32 endRun   = findRun(fontRuns, limit - 1);

sub->reset();

for (le_int32 run = startRun; run <= endRun; run += 1) {
        const LEFontInstance *runFont = fontRuns->getFont(run);
        le_int32 runLimit = fontRuns->getLimit(run) - start;

if (run == endRun) {
            runLimit = limit - start;
        }

sub->add(runFont, runLimit);
    }
}

Paragraph::Paragraph(const LEUnicode chars[], int32_t charCount, const FontRuns *fontRuns, LEErrorCode &status)
  : fParagraphLayout(NULL), fParagraphCount(0), fParagraphMax(PARA_GROW), fParagraphGrow(PARA_GROW),
    fLineCount(0), fLinesMax(LINE_GROW), fLinesGrow(LINE_GROW), fLines(NULL), fChars(NULL),
    fLineHeight(-1), fAscent(-1), fWidth(-1), fHeight(-1), fParagraphLevel(UBIDI_DEFAULT_LTR)
{
    static const LEUnicode separators[] = {CH_LF, CH_CR, CH_LSEP, CH_PSEP, 0x0000};

if (LE_FAILURE(status)) {
		return;
	}

le_int32 ascent  = 0;
    le_int32 descent = 0;
    le_int32 leading = 0;

LocaleRuns *locales = NULL;
    FontRuns fr(0);

fLines = LE_NEW_ARRAY(const ParagraphLayout::Line *, fLinesMax);
    fParagraphLayout = LE_NEW_ARRAY(ParagraphLayout *, fParagraphMax);

fChars = LE_NEW_ARRAY(LEUnicode, charCount + 1);
    LE_ARRAY_COPY(fChars, chars, charCount);
    fChars[charCount] = 0;

LEUnicode *pStart = &fChars[0];

while (*pStart != 0) {
        LEUnicode *pEnd = u_strpbrk(pStart, separators);
        le_int32 pAscent, pDescent, pLeading;
        ParagraphLayout *paragraphLayout = NULL;

if (pEnd == NULL) {
            pEnd = &fChars[charCount];
        }

if (pEnd != pStart) {
            subsetFontRuns(fontRuns, pStart - fChars, pEnd - fChars, &fr);

paragraphLayout = new ParagraphLayout(pStart, pEnd - pStart, &fr, NULL, NULL, locales, fParagraphLevel, FALSE, status);

if (LE_FAILURE(status)) {
                delete paragraphLayout;
                break; // return? something else?
            }

if (fParagraphLevel == UBIDI_DEFAULT_LTR) {
                fParagraphLevel = paragraphLayout->getParagraphLevel();
            }

pAscent  = paragraphLayout->getAscent();
            pDescent = paragraphLayout->getDescent();
            pLeading = paragraphLayout->getLeading();

if (pAscent > ascent) {
                ascent = pAscent;
            }

if (pDescent > descent) {
                descent = pDescent;
            }

if (pLeading > leading) {
                leading = pLeading;
            }
        }

if (fParagraphCount >= fParagraphMax) {
            fParagraphLayout = (ParagraphLayout **) LE_GROW_ARRAY(fParagraphLayout, fParagraphMax + fParagraphGrow);
            fParagraphMax += fParagraphGrow;
        }

fParagraphLayout[fParagraphCount++] = paragraphLayout;

if (*pEnd == 0) {
            break;
        }

pStart = skipLineEnd(pEnd);
    }

fLineHeight = ascent + descent + leading;
    fAscent     = ascent;
}

Paragraph::~Paragraph()
{
    for (le_int32 line = 0; line < fLineCount; line += 1) {
        delete /*(LineInfo *)*/ fLines[line];
    }

for (le_int32 paragraph = 0; paragraph < fParagraphCount; paragraph += 1) {
        delete fParagraphLayout[paragraph];
    }

LE_DELETE_ARRAY(fLines);
    LE_DELETE_ARRAY(fParagraphLayout);
    LE_DELETE_ARRAY(fChars);
}

void Paragraph::addLine(const ParagraphLayout::Line *line)
{
    if (fLineCount >= fLinesMax) {
        fLines = (const ParagraphLayout::Line **) LE_GROW_ARRAY(fLines, fLinesMax + fLinesGrow);
        fLinesMax += fLinesGrow;
    }

fLines[fLineCount++] = line;
}

void Paragraph::breakLines(le_int32 width, le_int32 height)
{
    fHeight = height;

// don't re-break if the width hasn't changed
    if (fWidth == width) {
        return;
    }

fWidth  = width;

float lineWidth = (float) (width - 2 * MARGIN);
    const ParagraphLayout::Line *line;

// Free the old LineInfo's...
    for (le_int32 li = 0; li < fLineCount; li += 1) {
        delete fLines[li];
    }

fLineCount = 0;

for (le_int32 p = 0; p < fParagraphCount; p += 1) {
        ParagraphLayout *paragraphLayout = fParagraphLayout[p];

if (paragraphLayout != NULL) {
            paragraphLayout->reflow();
            while ((line = paragraphLayout->nextLine(lineWidth)) != NULL) {
                addLine(line);
            }
        } else {
            addLine(NULL);
        }
    }
}

void Paragraph::draw(RenderingSurface *surface, le_int32 firstLine, le_int32 lastLine)
{
    le_int32 li, x, y;

x = MARGIN;
    y = fAscent;

for (li = firstLine; li <= lastLine; li += 1) {
        const ParagraphLayout::Line *line = fLines[li];

if (line != NULL) {
            le_int32 runCount = line->countRuns();
            le_int32 run;

if (fParagraphLevel == UBIDI_RTL) {
			    le_int32 lastX = line->getWidth();

x = (fWidth - lastX - MARGIN);
		    }

for (run = 0; run < runCount; run += 1) {
                const ParagraphLayout::VisualRun *visualRun = line->getVisualRun(run);
                le_int32 glyphCount = visualRun->getGlyphCount();
                const LEFontInstance *font = visualRun->getFont();
                const LEGlyphID *glyphs = visualRun->getGlyphs();
                const float *positions = visualRun->getPositions();

surface->drawGlyphs(font, glyphs, glyphCount, positions, x, y, fWidth, fHeight);
            }
        }

y += fLineHeight;
    }
}

Paragraph *Paragraph::paragraphFactory(const char *fileName, const LEFontInstance *font, GUISupport *guiSupport)
{
    LEErrorCode status  = LE_NO_ERROR;
    le_int32 charCount;
    const UChar *text = UnicodeReader::readFile(fileName, guiSupport, charCount);
    Paragraph *result = NULL;

if (text == NULL) {
        return NULL;
    }

FontRuns  fontRuns(0);

fontRuns.add(font, charCount);

result = new Paragraph(text, charCount, &fontRuns, status);

if (LE_FAILURE(status)) {
		delete result;
		result = NULL;
	}

LE_DELETE_ARRAY(text);

return result;    
}

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