public void getJustificationInfos(
GlyphJustificationInfo[] infos, int infoStart, int charStart, int charLimit) {
// This simple implementation only uses spaces for justification.
// Since regular characters aren't justified, we don't need to deal with
// special infos for combining marks or ligature substitution glyphs.
// added character justification for kanjii only 2/22/98
StandardGlyphVector gv = getGV();
float[] charinfo = getCharinfo();
float size = gv.getFont().getSize2D();
GlyphJustificationInfo nullInfo =
new GlyphJustificationInfo(
0,
false,
GlyphJustificationInfo.PRIORITY_NONE,
0,
0,
false,
GlyphJustificationInfo.PRIORITY_NONE,
0,
0);
GlyphJustificationInfo spaceInfo =
new GlyphJustificationInfo(
size,
true,
GlyphJustificationInfo.PRIORITY_WHITESPACE,
0,
size,
true,
GlyphJustificationInfo.PRIORITY_WHITESPACE,
0,
size / 4f);
GlyphJustificationInfo kanjiInfo =
new GlyphJustificationInfo(
size,
true,
GlyphJustificationInfo.PRIORITY_INTERCHAR,
size,
size,
false,
GlyphJustificationInfo.PRIORITY_NONE,
0,
0);
char[] chars = source.getChars();
int offset = source.getStart();
// assume data is 1-1 and either all rtl or all ltr, for now
int numGlyphs = gv.getNumGlyphs();
int minGlyph = 0;
int maxGlyph = numGlyphs;
boolean ltr = (source.getLayoutFlags() & 0x1) == 0;
if (charStart != 0 || charLimit != source.getLength()) {
if (ltr) {
minGlyph = charStart;
maxGlyph = charLimit;
} else {
minGlyph = numGlyphs - charLimit;
maxGlyph = numGlyphs - charStart;
}
}
for (int i = 0; i < numGlyphs; ++i) {
GlyphJustificationInfo info = null;
if (i >= minGlyph && i < maxGlyph) {
if (charinfo[i * numvals + advx] == 0) { // combining marks don't justify
info = nullInfo;
} else {
int ci = v2l(i); // 1-1 assumption again
char c = chars[offset + ci];
if (Character.isWhitespace(c)) {
info = spaceInfo;
// CJK, Hangul, CJK Compatibility areas
} else if (c >= 0x4e00 && (c < 0xa000)
|| (c >= 0xac00 && c < 0xd7b0)
|| (c >= 0xf900 && c < 0xfb00)) {
info = kanjiInfo;
} else {
info = nullInfo;
}
}
}
infos[infoStart + i] = info;
}
}
public TextLineComponent applyJustificationDeltas(
float[] deltas, int deltaStart, boolean[] flags) {
// when we justify, we need to adjust the charinfo since spaces
// change their advances. preserve the existing charinfo.
float[] newCharinfo = (float[]) getCharinfo().clone();
// we only push spaces, so never need to rejustify
flags[0] = false;
// preserve the existing gv.
StandardGlyphVector newgv = (StandardGlyphVector) getGV().clone();
float[] newPositions = newgv.getGlyphPositions(null);
int numGlyphs = newgv.getNumGlyphs();
/*
System.out.println("oldgv: " + getGV() + ", newgv: " + newgv);
System.out.println("newpositions: " + newPositions);
for (int i = 0; i < newPositions.length; i += 2) {
System.out.println("[" + (i/2) + "] " + newPositions[i] + ", " + newPositions[i+1]);
}
System.out.println("deltas: " + deltas + " start: " + deltaStart);
for (int i = deltaStart; i < deltaStart + numGlyphs; i += 2) {
System.out.println("[" + (i/2) + "] " + deltas[i] + ", " + deltas[i+1]);
}
*/
char[] chars = source.getChars();
int offset = source.getStart();
// accumulate the deltas to adjust positions and advances.
// handle whitespace by modifying advance,
// handle everything else by modifying position before and after
float deltaPos = 0;
for (int i = 0; i < numGlyphs; ++i) {
if (Character.isWhitespace(chars[offset + v2l(i)])) {
newPositions[i * 2] += deltaPos;
float deltaAdv = deltas[deltaStart + i * 2] + deltas[deltaStart + i * 2 + 1];
newCharinfo[i * numvals + posx] += deltaPos;
newCharinfo[i * numvals + visx] += deltaPos;
newCharinfo[i * numvals + advx] += deltaAdv;
deltaPos += deltaAdv;
} else {
deltaPos += deltas[deltaStart + i * 2];
newPositions[i * 2] += deltaPos;
newCharinfo[i * numvals + posx] += deltaPos;
newCharinfo[i * numvals + visx] += deltaPos;
deltaPos += deltas[deltaStart + i * 2 + 1];
}
}
newPositions[numGlyphs * 2] += deltaPos;
newgv.setGlyphPositions(newPositions);
/*
newPositions = newgv.getGlyphPositions(null);
System.out.println(">> newpositions: " + newPositions);
for (int i = 0; i < newPositions.length; i += 2) {
System.out.println("[" + (i/2) + "] " + newPositions[i] + ", " + newPositions[i+1]);
}
*/
ExtendedTextSourceLabel result = new ExtendedTextSourceLabel(source, decorator);
result.gv = newgv;
result.charinfo = newCharinfo;
return result;
}
/*
* This takes the glyph info record obtained from the glyph vector and converts it into a similar record
* adjusted to represent character data instead. For economy we don't use glyph info records in this processing.
*
* Here are some constraints:
* - there can be more glyphs than characters (glyph insertion, perhaps based on normalization, has taken place)
* - there can not be fewer glyphs than characters (0xffff glyphs are inserted for characters ligaturized away)
* - each glyph maps to a single character, when multiple glyphs exist for a character they all map to it, but
* no two characters map to the same glyph
* - multiple glyphs mapping to the same character need not be in sequence (thai, tamil have split characters)
* - glyphs may be arbitrarily reordered (Indic reorders glyphs)
* - all glyphs share the same bidi level
* - all glyphs share the same horizontal (or vertical) baseline
* - combining marks visually follow their base character in the glyph array-- i.e. in an rtl gv they are
* to the left of their base character-- and have zero advance.
*
* The output maps this to character positions, and therefore caret positions, via the following assumptions:
* - zero-advance glyphs do not contribute to the advance of their character (i.e. position is ignored), conversely
* if a glyph is to contribute to the advance of its character it must have a non-zero (float) advance
* - no carets can appear between a zero width character and its preceeding character, where 'preceeding' is
* defined logically.
* - no carets can appear within a split character
* - no carets can appear within a local reordering (i.e. Indic reordering, or non-adjacent split characters)
* - all characters lie on the same baseline, and it is either horizontal or vertical
* - the charinfo is in uniform ltr or rtl order (visual order), since local reorderings and split characters are removed
*
* The algorithm works in the following way:
* 1) we scan the glyphs ltr or rtl based on the bidi run direction
* 2) we can work in place, since we always consume a glyph for each char we write
* a) if the line is ltr, we start writing at position 0 until we finish, there may be leftver space
* b) if the line is rtl and 1-1, we start writing at position numChars/glyphs - 1 until we finish at 0
* c) otherwise if we don't finish at 0, we have to copy the data down
* 3) we consume clusters in the following way:
* a) the first element is always consumed
* b) subsequent elements are consumed if:
* i) their advance is zero
* ii) their character index <= the character index of any character seen in this cluster
* iii) the minimum character index seen in this cluster isn't adjacent to the previous cluster
* c) character data is written as follows for horizontal lines (x/y and w/h are exchanged on vertical lines)
* i) the x position is the position of the leftmost glyph whose advance is not zero
* ii)the y position is the baseline
* iii) the x advance is the distance to the maximum x + adv of all glyphs whose advance is not zero
* iv) the y advance is the baseline
* v) vis x,y,w,h tightly encloses the vis x,y,w,h of all the glyphs with nonzero w and h
* 4) we can make some simple optimizations if we know some things:
* a) if the mapping is 1-1, unidirectional, and there are no zero-adv glyphs, we just return the glyphinfo
* b) if the mapping is 1-1, unidirectional, we just adjust the remaining glyphs to originate at right/left of the base
* c) if the mapping is 1-1, we compute the base position and advance as we go, then go back to adjust the remaining glyphs
* d) otherwise we keep separate track of the write position as we do (c) since no glyph in the cluster may be in the
* position we are writing.
* e) most clusters are simply the single base glyph in the same position as its character, so we try to avoid
* copying its data unnecessarily.
* 5) the glyph vector ought to provide access to these 'global' attributes to enable these optimizations. A single
* int with flags set is probably ok, we could also provide accessors for each attribute. This doesn't map to
* the GlyphMetrics flags very well, so I won't attempt to keep them similar. It might be useful to add those
* in addition to these.
* int FLAG_HAS_ZERO_ADVANCE_GLYPHS = 1; // set if there are zero-advance glyphs
* int FLAG_HAS_NONUNIFORM_ORDER = 2; // set if some glyphs are rearranged out of character visual order
* int FLAG_HAS_SPLIT_CHARACTERS = 4; // set if multiple glyphs per character
* int getDescriptionFlags(); // return an int containing the above flags
* boolean hasZeroAdvanceGlyphs();
* boolean hasNonuniformOrder();
* boolean hasSplitCharacters();
* The optimized cases in (4) correspond to values 0, 1, 3, and 7 returned by getDescriptionFlags().
*/
protected float[] createCharinfo() {
StandardGlyphVector gv = getGV();
float[] glyphinfo = null;
try {
glyphinfo = gv.getGlyphInfo();
} catch (Exception e) {
System.out.println(source);
}
/*
if ((gv.getDescriptionFlags() & 0x7) == 0) {
return glyphinfo;
}
*/
int numGlyphs = gv.getNumGlyphs();
int[] indices = gv.getGlyphCharIndices(0, numGlyphs, null);
boolean DEBUG = false;
if (DEBUG) {
System.err.println("number of glyphs: " + numGlyphs);
for (int i = 0; i < numGlyphs; ++i) {
System.err.println(
"g: "
+ i
+ ", x: "
+ glyphinfo[i * numvals + posx]
+ ", a: "
+ glyphinfo[i * numvals + advx]
+ ", n: "
+ indices[i]);
}
}
int minIndex = indices[0]; // smallest index seen this cluster
int maxIndex = minIndex; // largest index seen this cluster
int nextMin = 0; // expected smallest index for this cluster
int cp = 0; // character position
int cx = 0; // character index (logical)
int gp = 0; // glyph position
int gx = 0; // glyph index (visual)
int gxlimit = numGlyphs; // limit of gx, when we reach this we're done
int pdelta = numvals; // delta for incrementing positions
int xdelta = 1; // delta for incrementing indices
boolean ltr = (source.getLayoutFlags() & 0x1) == 0;
if (!ltr) {
minIndex = indices[numGlyphs - 1];
maxIndex = minIndex;
nextMin = 0; // still logical
cp = glyphinfo.length - numvals;
cx = 0; // still logical
gp = glyphinfo.length - numvals;
gx = numGlyphs - 1;
gxlimit = -1;
pdelta = -numvals;
xdelta = -1;
}
/*
// to support vertical, use 'ixxxx' indices and swap horiz and vertical components
if (source.isVertical()) {
iposx = posy;
iposy = posx;
iadvx = advy;
iadvy = advx;
ivisx = visy;
ivisy = visx;
ivish = visw;
ivisw = vish;
} else {
// use standard values
}
*/
// use intermediates to reduce array access when we need to
float cposl = 0, cposr = 0, cvisl = 0, cvist = 0, cvisr = 0, cvisb = 0;
float baseline = 0;
// record if we have to copy data even when no cluster
boolean mustCopy = false;
while (gx != gxlimit) {
// start of new cluster
boolean haveCopy = false;
int clusterExtraGlyphs = 0;
minIndex = indices[gx];
maxIndex = minIndex;
// advance to next glyph
gx += xdelta;
gp += pdelta;
/*
while (gx != gxlimit && (glyphinfo[gp + advx] == 0 ||
minIndex != nextMin || indices[gx] <= maxIndex)) {
*/
while (gx != gxlimit
&& ((glyphinfo[gp + advx] == 0)
|| (minIndex != nextMin)
|| (indices[gx] <= maxIndex)
|| (maxIndex - minIndex > clusterExtraGlyphs))) {
// initialize base data first time through, using base glyph
if (!haveCopy) {
int gps = gp - pdelta;
cposl = glyphinfo[gps + posx];
cposr = cposl + glyphinfo[gps + advx];
cvisl = glyphinfo[gps + visx];
cvist = glyphinfo[gps + visy];
cvisr = cvisl + glyphinfo[gps + visw];
cvisb = cvist + glyphinfo[gps + vish];
haveCopy = true;
}
// have an extra glyph in this cluster
++clusterExtraGlyphs;
// adjust advance only if new glyph has non-zero advance
float radvx = glyphinfo[gp + advx];
if (radvx != 0) {
float rposx = glyphinfo[gp + posx];
cposl = Math.min(cposl, rposx);
cposr = Math.max(cposr, rposx + radvx);
}
// adjust visible bounds only if new glyph has non-empty bounds
float rvisw = glyphinfo[gp + visw];
if (rvisw != 0) {
float rvisx = glyphinfo[gp + visx];
float rvisy = glyphinfo[gp + visy];
cvisl = Math.min(cvisl, rvisx);
cvist = Math.min(cvist, rvisy);
cvisr = Math.max(cvisr, rvisx + rvisw);
cvisb = Math.max(cvisb, rvisy + glyphinfo[gp + vish]);
}
// adjust min, max index
minIndex = Math.min(minIndex, indices[gx]);
maxIndex = Math.max(maxIndex, indices[gx]);
// get ready to examine next glyph
gx += xdelta;
gp += pdelta;
}
// done with cluster, gx and gp are set for next glyph
if (DEBUG) {
System.out.println("minIndex = " + minIndex + ", maxIndex = " + maxIndex);
}
nextMin = maxIndex + 1;
// do common character adjustments
glyphinfo[cp + posy] = baseline;
glyphinfo[cp + advy] = 0;
if (haveCopy) {
// save adjustments to the base character
glyphinfo[cp + posx] = cposl;
glyphinfo[cp + advx] = cposr - cposl;
glyphinfo[cp + visx] = cvisl;
glyphinfo[cp + visy] = cvist;
glyphinfo[cp + visw] = cvisr - cvisl;
glyphinfo[cp + vish] = cvisb - cvist;
// compare number of chars read with number of glyphs read.
// if more glyphs than chars, set mustCopy to true, as we'll always have
// to copy the data from here on out.
if (maxIndex - minIndex < clusterExtraGlyphs) {
mustCopy = true;
}
// Fix the characters that follow the base character.
// New values are all the same. Note we fix the number of characters
// we saw, not the number of glyphs we saw.
if (minIndex < maxIndex) {
if (!ltr) {
// if rtl, characters to left of base, else to right. reuse cposr.
cposr = cposl;
}
cvisr -= cvisl; // reuse, convert to deltas.
cvisb -= cvist;
int iMinIndex = minIndex, icp = cp / 8;
while (minIndex < maxIndex) {
++minIndex;
cx += xdelta;
cp += pdelta;
if (cp < 0 || cp >= glyphinfo.length) {
if (DEBUG)
System.out.println(
"minIndex = " + iMinIndex + ", maxIndex = " + maxIndex + ", cp = " + icp);
}
glyphinfo[cp + posx] = cposr;
glyphinfo[cp + posy] = baseline;
glyphinfo[cp + advx] = 0;
glyphinfo[cp + advy] = 0;
glyphinfo[cp + visx] = cvisl;
glyphinfo[cp + visy] = cvist;
glyphinfo[cp + visw] = cvisr;
glyphinfo[cp + vish] = cvisb;
}
}
// no longer using this copy
haveCopy = false;
} else if (mustCopy) {
// out of synch, so we have to copy all the time now
int gpr = gp - pdelta;
glyphinfo[cp + posx] = glyphinfo[gpr + posx];
glyphinfo[cp + advx] = glyphinfo[gpr + advx];
glyphinfo[cp + visx] = glyphinfo[gpr + visx];
glyphinfo[cp + visy] = glyphinfo[gpr + visy];
glyphinfo[cp + visw] = glyphinfo[gpr + visw];
glyphinfo[cp + vish] = glyphinfo[gpr + vish];
}
// else glyphinfo is already at the correct character position, and is unchanged, so just
// leave it
// reset for new cluster
cp += pdelta;
cx += xdelta;
}
if (mustCopy && !ltr) {
// data written to wrong end of array, need to shift down
cp -= pdelta; // undo last increment, get start of valid character data in array
System.arraycopy(glyphinfo, cp, glyphinfo, 0, glyphinfo.length - cp);
}
if (DEBUG) {
char[] chars = source.getChars();
int start = source.getStart();
int length = source.getLength();
System.out.println("char info for " + length + " characters");
for (int i = 0; i < length * numvals; ) {
System.out.println(
" ch: "
+ Integer.toHexString(chars[start + v2l(i / numvals)])
+ " x: "
+ glyphinfo[i++]
+ " y: "
+ glyphinfo[i++]
+ " xa: "
+ glyphinfo[i++]
+ " ya: "
+ glyphinfo[i++]
+ " l: "
+ glyphinfo[i++]
+ " t: "
+ glyphinfo[i++]
+ " w: "
+ glyphinfo[i++]
+ " h: "
+ glyphinfo[i++]);
}
}
return glyphinfo;
}
