bool ZLTextAreaController::preparePaintInfo() {
if ((myPaintState == NOTHING_TO_PAINT) || (myPaintState == READY)) {
return false;
}
myArea.myLineInfoCache.insert(myArea.myLineInfos.begin(), myArea.myLineInfos.end());
switch (myPaintState) {
default:
break;
case TO_SCROLL_FORWARD:
if (!myArea.myEndCursor.paragraphCursor().isLast() ||
!myArea.myEndCursor.isEndOfParagraph()) {
ZLTextWordCursor startCursor;
switch (myScrollingMode) {
case NO_OVERLAPPING:
break;
case KEEP_LINES:
startCursor = findLineFromEnd(myOverlappingValue);
break;
case SCROLL_LINES:
startCursor = findLineFromStart(myOverlappingValue);
if (startCursor.isEndOfParagraph()) {
startCursor.nextParagraph();
}
break;
case SCROLL_PERCENTAGE:
startCursor = findPercentFromStart(myOverlappingValue);
break;
}
if (!startCursor.isNull() && (startCursor == myArea.myStartCursor)) {
startCursor = findLineFromStart(1);
}
if (!startCursor.isNull()) {
ZLTextWordCursor endCursor = buildInfos(startCursor);
if (!visiblePageIsEmpty() && ((myScrollingMode != KEEP_LINES) || (endCursor != myArea.myEndCursor))) {
myArea.myStartCursor = startCursor;
myArea.myEndCursor = endCursor;
break;
}
}
myArea.myStartCursor = myArea.myEndCursor;
myArea.myEndCursor = buildInfos(myArea.myStartCursor);
}
break;
case TO_SCROLL_BACKWARD:
if (!myArea.myStartCursor.paragraphCursor().isFirst() || !myArea.myStartCursor.isStartOfParagraph()) {
switch (myScrollingMode) {
case NO_OVERLAPPING:
myArea.myStartCursor = findStart(myArea.myStartCursor, PIXEL_UNIT, myArea.height());
break;
case KEEP_LINES:
{
ZLTextWordCursor endCursor = findLineFromStart(myOverlappingValue);
if (!endCursor.isNull() && (endCursor == myArea.myEndCursor)) {
endCursor = findLineFromEnd(1);
}
if (!endCursor.isNull()) {
ZLTextWordCursor startCursor = findStart(endCursor, PIXEL_UNIT, myArea.height());
myArea.myStartCursor =
(startCursor != myArea.myStartCursor) ?
startCursor : findStart(myArea.myStartCursor, PIXEL_UNIT, myArea.height());
} else {
myArea.myStartCursor = findStart(myArea.myStartCursor, PIXEL_UNIT, myArea.height());
}
break;
}
case SCROLL_LINES:
myArea.myStartCursor = findStart(myArea.myStartCursor, LINE_UNIT, myOverlappingValue);
break;
case SCROLL_PERCENTAGE:
myArea.myStartCursor =
findStart(myArea.myStartCursor, PIXEL_UNIT, myArea.height() * myOverlappingValue / 100);
break;
}
myArea.myEndCursor = buildInfos(myArea.myStartCursor);
if (visiblePageIsEmpty()) {
myArea.myStartCursor = findStart(myArea.myStartCursor, LINE_UNIT, 1);
myArea.myEndCursor = buildInfos(myArea.myStartCursor);
}
}
break;
case START_IS_KNOWN:
myArea.myEndCursor = buildInfos(myArea.myStartCursor);
if (visiblePageIsEmpty()) {
ZLTextWordCursor startCursor = findLineFromStart(1);
if (!startCursor.isNull()) {
myArea.myStartCursor = startCursor;
if (myArea.myStartCursor.isEndOfParagraph()) {
myArea.myStartCursor.nextParagraph();
}
myArea.myEndCursor = buildInfos(myArea.myStartCursor);
}
}
break;
case END_IS_KNOWN:
myArea.myStartCursor = findStart(myArea.myEndCursor, PIXEL_UNIT, myArea.height());
myArea.myEndCursor = buildInfos(myArea.myStartCursor);
break;
}
myPaintState = READY;
myArea.myLineInfoCache.clear();
return true;
}
void TextView::preparePaintInfo() {
context().setLeftMargin(TextStyleCollection::instance().baseStyle().LeftMarginOption.value());
context().setRightMargin(TextStyleCollection::instance().baseStyle().RightMarginOption.value());
context().setTopMargin(TextStyleCollection::instance().baseStyle().TopMarginOption.value());
context().setBottomMargin(TextStyleCollection::instance().baseStyle().BottomMarginOption.value());
int newWidth = context().width();
int newHeight = myStyle.textAreaHeight();
if ((newWidth != myOldWidth) || (newHeight != myOldHeight)) {
myOldWidth = newWidth;
myOldHeight = newHeight;
rebuildPaintInfo(false);
}
if ((myPaintState == NOTHING_TO_PAINT) || (myPaintState == READY)) {
return;
}
myLineInfoCache.insert(myLineInfos.begin(), myLineInfos.end());
switch (myPaintState) {
default:
break;
case TO_SCROLL_FORWARD:
if (!myEndCursor.paragraphCursor().isLast() || !myEndCursor.isEndOfParagraph()) {
WordCursor startCursor;
switch (myScrollingMode) {
case NO_OVERLAPPING:
break;
case KEEP_LINES:
startCursor = findLineFromEnd(myOverlappingValue);
break;
case SCROLL_LINES:
startCursor = findLineFromStart(myOverlappingValue);
break;
case SCROLL_PERCENTAGE:
startCursor = findPercentFromStart(myOverlappingValue);
break;
}
if (!startCursor.isNull() && (startCursor == myStartCursor)) {
startCursor = findLineFromStart(1);
}
if (!startCursor.isNull()) {
WordCursor endCursor = buildInfos(startCursor);
if (!pageIsEmpty() && ((myScrollingMode != KEEP_LINES) || (endCursor != myEndCursor))) {
myStartCursor = startCursor;
myEndCursor = endCursor;
break;
}
}
myStartCursor = myEndCursor;
myEndCursor = buildInfos(myStartCursor);
}
break;
case TO_SCROLL_BACKWARD:
if (!myStartCursor.paragraphCursor().isFirst() || !myStartCursor.isStartOfParagraph()) {
switch (myScrollingMode) {
case NO_OVERLAPPING:
myStartCursor = findStart(myStartCursor, PIXEL_UNIT, myStyle.textAreaHeight());
break;
case KEEP_LINES:
{
WordCursor endCursor = findLineFromStart(myOverlappingValue);
if (!endCursor.isNull() && (endCursor == myEndCursor)) {
endCursor = findLineFromEnd(1);
}
if (!endCursor.isNull()) {
WordCursor startCursor = findStart(endCursor, PIXEL_UNIT, myStyle.textAreaHeight());
myStartCursor =
(startCursor != myStartCursor) ?
startCursor : findStart(myStartCursor, PIXEL_UNIT, myStyle.textAreaHeight());
} else {
myStartCursor = findStart(myStartCursor, PIXEL_UNIT, myStyle.textAreaHeight());
}
break;
}
case SCROLL_LINES:
myStartCursor = findStart(myStartCursor, LINE_UNIT, myOverlappingValue);
break;
case SCROLL_PERCENTAGE:
myStartCursor =
findStart(myStartCursor, PIXEL_UNIT, myStyle.textAreaHeight() * myOverlappingValue / 100);
break;
}
myEndCursor = buildInfos(myStartCursor);
}
break;
case START_IS_KNOWN:
myEndCursor = buildInfos(myStartCursor);
break;
case END_IS_KNOWN:
myStartCursor = findStart(myEndCursor, PIXEL_UNIT, myStyle.textAreaHeight());
myEndCursor = buildInfos(myStartCursor);
break;
}
myPaintState = READY;
myLineInfoCache.clear();
}