#include "visible_units.h"
#include <qstring.h>
#include "htmltags.h"
#include "misc/helper.h"
#include "rendering/render_text.h"
#include "rendering/render_block.h"
#include "visible_position.h"
#include "visible_text.h"
#include "xml/dom_docimpl.h"
#include "xml/dom_elementimpl.h"
using DOM::DocumentImpl;
using DOM::ElementImpl;
using DOM::NodeImpl;
using DOM::Position;
using DOM::Range;
namespace khtml {
static VisiblePosition previousBoundary(const VisiblePosition &c, unsigned (*searchFunction)(const QChar *, unsigned))
{
Position pos = c.deepEquivalent();
NodeImpl *n = pos.node();
if (!n)
return VisiblePosition();
DocumentImpl *d = n->getDocument();
if (!d)
return VisiblePosition();
NodeImpl *de = d->documentElement();
if (!de)
return VisiblePosition();
NodeImpl *boundary = n->enclosingBlockFlowElement();
if (!boundary)
return VisiblePosition();
bool isContentEditable = boundary->isContentEditable();
while (boundary && boundary != de && boundary->parentNode() && isContentEditable == boundary->parentNode()->isContentEditable()) {
boundary = boundary->parentNode();
}
Range searchRange(d);
searchRange.setStartBefore(boundary);
Position end(pos.equivalentRangeCompliantPosition());
searchRange.setEnd(end.node(), end.offset());
SimplifiedBackwardsTextIterator it(searchRange);
QString string;
unsigned next = 0;
while (!it.atEnd() && it.length() > 0) {
string.prepend(it.characters(), it.length());
next = searchFunction(string.unicode(), string.length());
if (next != 0)
break;
it.advance();
}
if (it.atEnd() && next == 0) {
Range range(it.range());
pos = Position(range.startContainer().handle(), range.startOffset());
}
else if (!it.atEnd() && it.length() == 0) {
QChar chars[2];
chars[0] = 'X';
chars[1] = ' ';
string.prepend(chars, 2);
unsigned pastImage = searchFunction(string.unicode(), string.length());
Range range(it.range());
if (pastImage == 0)
pos = Position(range.startContainer().handle(), range.startOffset());
else
pos = Position(range.endContainer().handle(), range.endOffset());
}
else if (next != 0) {
NodeImpl *node = it.range().startContainer().handle();
if (node->isTextNode() || (node->renderer() && node->renderer()->isBR())) {
pos = Position(node, next);
}
else {
pos = Position(node, it.range().startOffset());
}
}
return VisiblePosition(pos, DOWNSTREAM, VisiblePosition::INIT_DOWN);
}
static VisiblePosition nextBoundary(const VisiblePosition &c, unsigned (*searchFunction)(const QChar *, unsigned))
{
Position pos = c.deepEquivalent();
NodeImpl *n = pos.node();
if (!n)
return VisiblePosition();
DocumentImpl *d = n->getDocument();
if (!d)
return VisiblePosition();
NodeImpl *de = d->documentElement();
if (!de)
return VisiblePosition();
NodeImpl *boundary = n->enclosingBlockFlowElement();
if (!boundary)
return VisiblePosition();
bool isContentEditable = boundary->isContentEditable();
while (boundary && boundary != de && boundary->parentNode() && isContentEditable == boundary->parentNode()->isContentEditable()) {
boundary = boundary->parentNode();
}
Range searchRange(d);
Position start(pos.equivalentRangeCompliantPosition());
searchRange.setStart(start.node(), start.offset());
searchRange.setEndAfter(boundary);
TextIterator it(searchRange, RUNFINDER);
QString string;
unsigned next = 0;
while (!it.atEnd() && it.length() > 0) {
string.append(it.characters(), it.length());
next = searchFunction(string.unicode(), string.length());
if (next != string.length())
break;
it.advance();
}
if (it.atEnd() && next == string.length()) {
Range range(it.range());
pos = Position(range.startContainer().handle(), range.startOffset());
}
else if (!it.atEnd() && it.length() == 0) {
QChar chars[2];
chars[0] = ' ';
chars[1] = 'X';
string.append(chars, 2);
unsigned pastImage = searchFunction(string.unicode(), string.length());
Range range(it.range());
if (next != pastImage)
pos = Position(range.endContainer().handle(), range.endOffset());
else
pos = Position(range.startContainer().handle(), range.startOffset());
}
else if (next != 0) {
CharacterIterator charIt(searchRange);
charIt.advance(next - 1);
pos = Position(charIt.range().endContainer().handle(), charIt.range().endOffset());
}
return VisiblePosition(pos, UPSTREAM, VisiblePosition::INIT_UP);
}
static unsigned startWordBoundary(const QChar *characters, unsigned length)
{
int start, end;
findWordBoundary(characters, length, length, &start, &end);
return start;
}
VisiblePosition startOfWord(const VisiblePosition &c, EWordSide side)
{
VisiblePosition p = c;
if (side == RightWordIfOnBoundary) {
if (isEndOfParagraph(c))
return c;
p = c.next();
if (p.isNull())
return c;
}
return previousBoundary(p, startWordBoundary);
}
static unsigned endWordBoundary(const QChar *characters, unsigned length)
{
int start, end;
findWordBoundary(characters, length, 0, &start, &end);
return end;
}
VisiblePosition endOfWord(const VisiblePosition &c, EWordSide side)
{
VisiblePosition p = c;
if (side == LeftWordIfOnBoundary) {
if (isStartOfParagraph(c))
return c;
p = c.previous();
if (p.isNull())
return c;
} else {
if (isEndOfParagraph(c)) {
p = c.next();
return p.isNotNull() ? p : c;
}
}
return nextBoundary(p, endWordBoundary);
}
static unsigned previousWordPositionBoundary(const QChar *characters, unsigned length)
{
return nextWordFromIndex(characters, length, length, false);
}
VisiblePosition previousWordPosition(const VisiblePosition &c)
{
return previousBoundary(c, previousWordPositionBoundary);
}
static unsigned nextWordPositionBoundary(const QChar *characters, unsigned length)
{
return nextWordFromIndex(characters, length, 0, true);
}
VisiblePosition nextWordPosition(const VisiblePosition &c)
{
return nextBoundary(c, nextWordPositionBoundary);
}
static RootInlineBox *rootBoxForLine(const VisiblePosition &c)
{
Position p = c.deepEquivalent();
NodeImpl *node = p.node();
if (!node)
return 0;
RenderObject *renderer = node->renderer();
if (!renderer)
return 0;
InlineBox *box = renderer->inlineBox(p.offset(), c.affinity());
if (!box)
return 0;
return box->root();
}
VisiblePosition startOfLine(const VisiblePosition &c)
{
RootInlineBox *rootBox = rootBoxForLine(c);
if (!rootBox)
return VisiblePosition();
InlineBox *startBox = rootBox->firstLeafChild();
if (!startBox)
return VisiblePosition();
RenderObject *startRenderer = startBox->object();
if (!startRenderer)
return VisiblePosition();
NodeImpl *startNode = startRenderer->element();
if (!startNode)
return VisiblePosition();
long startOffset = 0;
if (startBox->isInlineTextBox()) {
InlineTextBox *startTextBox = static_cast<InlineTextBox *>(startBox);
startOffset = startTextBox->m_start;
}
return VisiblePosition(startNode, startOffset, DOWNSTREAM);
}
VisiblePosition endOfLine(const VisiblePosition &c)
{
RootInlineBox *rootBox = rootBoxForLine(c);
if (!rootBox)
return VisiblePosition();
InlineBox *endBox = rootBox->lastLeafChild();
if (!endBox)
return VisiblePosition();
RenderObject *endRenderer = endBox->object();
if (!endRenderer)
return VisiblePosition();
NodeImpl *endNode = endRenderer->element();
if (!endNode)
return VisiblePosition();
long endOffset = 1;
if (endNode->id() == ID_BR) {
endOffset = 0;
} else if (endBox->isInlineTextBox()) {
InlineTextBox *endTextBox = static_cast<InlineTextBox *>(endBox);
endOffset = endTextBox->m_start + endTextBox->m_len;
}
VisiblePosition result = VisiblePosition(endNode, endOffset, DOWNSTREAM);
VisiblePosition temp = result;
temp.setAffinity(UPSTREAM);
if (visiblePositionsOnDifferentLines(temp, result))
result.setAffinity(UPSTREAM);
return result;
}
bool inSameLine(const VisiblePosition &a, const VisiblePosition &b)
{
return a.isNotNull() && startOfLine(a) == startOfLine(b);
}
bool isStartOfLine(const VisiblePosition &p)
{
return p.isNotNull() && p == startOfLine(p);
}
bool isEndOfLine(const VisiblePosition &p)
{
return p.isNotNull() && p == endOfLine(p);
}
VisiblePosition previousLinePosition(const VisiblePosition &c, int x)
{
Position p = c.affinity() == UPSTREAM ? c.deepEquivalent() : c.downstreamDeepEquivalent();
NodeImpl *node = p.node();
if (!node || !node->getDocument())
return VisiblePosition();
node->getDocument()->updateLayout();
RenderObject *renderer = node->renderer();
if (!renderer)
return VisiblePosition();
RenderBlock *containingBlock = 0;
RootInlineBox *root = 0;
InlineBox *box = renderer->inlineBox(p.offset(), c.affinity());
if (box) {
root = box->root()->prevRootBox();
if (root)
containingBlock = renderer->containingBlock();
}
if (!root) {
NodeImpl *startBlock = node->enclosingBlockFlowElement();
NodeImpl *n = node->previousEditable();
while (n && startBlock == n->enclosingBlockFlowElement())
n = n->previousEditable();
while (n) {
if (!n->inSameRootEditableElement(node))
break;
Position pos(n, n->caretMinOffset());
if (pos.inRenderedContent()) {
assert(n->renderer());
box = n->renderer()->inlineBox(n->caretMaxOffset());
if (box) {
root = box->root();
containingBlock = n->renderer()->containingBlock();
break;
}
VisiblePosition c2 = VisiblePosition(pos, DOWNSTREAM);
if (visiblePositionsOnDifferentLines(c, c2))
return c2;
}
n = n->previousEditable();
}
}
if (root) {
int absx, absy;
containingBlock->absolutePosition(absx, absy);
RenderObject *renderer = root->closestLeafChildForXPos(x, absx)->object();
return renderer->positionForCoordinates(x, absy + root->topOverflow());
}
return VisiblePosition(node->rootEditableElement(), 0, DOWNSTREAM);
}
VisiblePosition nextLinePosition(const VisiblePosition &c, int x)
{
Position p = c.affinity() == UPSTREAM ? c.deepEquivalent() : c.downstreamDeepEquivalent();
NodeImpl *node = p.node();
if (!node || !node->getDocument())
return VisiblePosition();
node->getDocument()->updateLayout();
RenderObject *renderer = node->renderer();
if (!renderer)
return VisiblePosition();
RenderBlock *containingBlock = 0;
RootInlineBox *root = 0;
InlineBox *box = renderer->inlineBox(p.offset(), c.affinity());
if (box) {
root = box->root()->nextRootBox();
if (root)
containingBlock = renderer->containingBlock();
}
if (!root) {
NodeImpl *startBlock = node->enclosingBlockFlowElement();
NodeImpl *n = node->nextEditable();
while (n && startBlock == n->enclosingBlockFlowElement())
n = n->nextEditable();
while (n) {
if (!n->inSameRootEditableElement(node))
break;
Position pos(n, n->caretMinOffset());
if (pos.inRenderedContent()) {
assert(n->renderer());
box = n->renderer()->inlineBox(n->caretMinOffset());
if (box) {
root = box->root();
containingBlock = n->renderer()->containingBlock();
break;
}
return VisiblePosition(pos, DOWNSTREAM);
}
n = n->nextEditable();
}
}
if (root) {
int absx, absy;
containingBlock->absolutePosition(absx, absy);
RenderObject *renderer = root->closestLeafChildForXPos(x, absx)->object();
return renderer->positionForCoordinates(x, absy + root->topOverflow());
}
ElementImpl *rootElement = node->rootEditableElement();
return VisiblePosition(rootElement, rootElement ? rootElement->childNodeCount() : 0, DOWNSTREAM);
}
static unsigned startSentenceBoundary(const QChar *characters, unsigned length)
{
int start, end;
findSentenceBoundary(characters, length, length, &start, &end);
return start;
}
VisiblePosition startOfSentence(const VisiblePosition &c)
{
return previousBoundary(c, startSentenceBoundary);
}
static unsigned endSentenceBoundary(const QChar *characters, unsigned length)
{
int start, end;
findSentenceBoundary(characters, length, 0, &start, &end);
return end;
}
VisiblePosition endOfSentence(const VisiblePosition &c)
{
return nextBoundary(c, endSentenceBoundary);
}
static unsigned previousSentencePositionBoundary(const QChar *characters, unsigned length)
{
return nextSentenceFromIndex(characters, length, length, false);
}
VisiblePosition previousSentencePosition(const VisiblePosition &c, int x)
{
return previousBoundary(c, previousSentencePositionBoundary);
}
static unsigned nextSentencePositionBoundary(const QChar *characters, unsigned length)
{
return nextSentenceFromIndex(characters, length, 0, true);
}
VisiblePosition nextSentencePosition(const VisiblePosition &c, int x)
{
return nextBoundary(c, nextSentencePositionBoundary);
}
VisiblePosition startOfParagraph(const VisiblePosition &c)
{
Position p = c.deepEquivalent();
NodeImpl *startNode = p.node();
if (!startNode)
return VisiblePosition();
NodeImpl *startBlock = startNode->enclosingBlockFlowElement();
NodeImpl *node = startNode;
long offset = p.offset();
for (NodeImpl *n = startNode; n; n = n->traversePreviousNodePostOrder(startBlock)) {
RenderObject *r = n->renderer();
if (!r)
continue;
RenderStyle *style = r->style();
if (style->visibility() != VISIBLE)
continue;
if (r->isBR() || r->isBlockFlow())
break;
if (r->isText()) {
if (style->whiteSpace() == PRE) {
QChar *text = static_cast<RenderText *>(r)->text();
long i = static_cast<RenderText *>(r)->length();
long o = offset;
if (n == startNode && o < i)
i = kMax(0L, o);
while (--i >= 0)
if (text[i] == '\n')
return VisiblePosition(n, i + 1, DOWNSTREAM);
}
node = n;
offset = 0;
} else if (r->isReplaced()) {
node = n;
offset = 0;
}
}
return VisiblePosition(node, offset, DOWNSTREAM);
}
VisiblePosition endOfParagraph(const VisiblePosition &c)
{
Position p = c.deepEquivalent();
NodeImpl *startNode = p.node();
if (!startNode)
return VisiblePosition();
NodeImpl *startBlock = startNode->enclosingBlockFlowElement();
NodeImpl *stayInsideBlock = startBlock;
NodeImpl *node = startNode;
long offset = p.offset();
for (NodeImpl *n = startNode; n; n = n->traverseNextNode(stayInsideBlock)) {
if (n->isContentEditable() != startNode->isContentEditable())
break;
RenderObject *r = n->renderer();
if (!r)
continue;
RenderStyle *style = r->style();
if (style->visibility() != VISIBLE)
continue;
if (r->isBR() || r->isBlockFlow())
break;
if (r->isText() && r->caretMaxRenderedOffset() > 0) {
long length = static_cast<RenderText *>(r)->length();
if (style->whiteSpace() == PRE) {
QChar *text = static_cast<RenderText *>(r)->text();
long o = 0;
if (n == startNode && offset < length)
o = offset;
for (long i = o; i < length; ++i)
if (text[i] == '\n')
return VisiblePosition(n, i, DOWNSTREAM);
}
node = n;
offset = length;
} else if (r->isReplaced()) {
node = n;
offset = 1;
}
}
return VisiblePosition(node, offset, DOWNSTREAM);
}
bool inSameParagraph(const VisiblePosition &a, const VisiblePosition &b)
{
return a.isNotNull() && startOfParagraph(a) == startOfParagraph(b);
}
bool isStartOfParagraph(const VisiblePosition &pos)
{
return pos.isNotNull() && isEqualIgnoringAffinity(pos, startOfParagraph(pos));
}
bool isEndOfParagraph(const VisiblePosition &pos)
{
return pos.isNotNull() && isEqualIgnoringAffinity(pos, endOfParagraph(pos));
}
VisiblePosition previousParagraphPosition(const VisiblePosition &p, int x)
{
VisiblePosition pos = p;
do {
VisiblePosition n = previousLinePosition(pos, x);
if (n.isNull() || n == pos) {
return p;
}
pos = n;
} while (inSameParagraph(p, pos));
return pos;
}
VisiblePosition nextParagraphPosition(const VisiblePosition &p, int x)
{
VisiblePosition pos = p;
do {
VisiblePosition n = nextLinePosition(pos, x);
if (n.isNull() || n == pos) {
return p;
}
pos = n;
} while (inSameParagraph(p, pos));
return pos;
}
VisiblePosition startOfBlock(const VisiblePosition &c)
{
Position p = c.deepEquivalent();
NodeImpl *startNode = p.node();
if (!startNode)
return VisiblePosition();
return VisiblePosition(Position(startNode->enclosingBlockFlowElement(), 0), DOWNSTREAM);
}
VisiblePosition endOfBlock(const VisiblePosition &c)
{
Position p = c.deepEquivalent();
NodeImpl *startNode = p.node();
if (!startNode)
return VisiblePosition();
NodeImpl *startBlock = startNode->enclosingBlockFlowElement();
NodeImpl *stayInsideBlock = startBlock;
NodeImpl *node = startNode;
long offset = p.offset();
for (NodeImpl *n = startNode; n; n = n->traverseNextNode(stayInsideBlock)) {
RenderObject *r = n->renderer();
if (!r)
continue;
RenderStyle *style = r->style();
if (style->visibility() != VISIBLE)
continue;
if (r->isBlockFlow())
break;
if (r->isText()) {
node = n;
offset = static_cast<RenderText *>(r)->length();
} else if (r->isReplaced()) {
node = n;
offset = 1;
}
}
return VisiblePosition(node, offset, DOWNSTREAM);
}
bool inSameBlock(const VisiblePosition &a, const VisiblePosition &b)
{
return a.isNotNull() && startOfBlock(a) == startOfBlock(b);
}
bool isStartOfBlock(const VisiblePosition &pos)
{
return pos.isNotNull() && isEqualIgnoringAffinity(pos, startOfBlock(pos));
}
bool isEndOfBlock(const VisiblePosition &pos)
{
return pos.isNotNull() && isEqualIgnoringAffinity(pos, endOfBlock(pos));
}
VisiblePosition startOfDocument(const VisiblePosition &c)
{
Position p = c.deepEquivalent();
NodeImpl *node = p.node();
if (!node)
return VisiblePosition();
DocumentImpl *doc = node->getDocument();
if (!doc)
return VisiblePosition();
return VisiblePosition(doc->documentElement(), 0, DOWNSTREAM);
}
VisiblePosition endOfDocument(const VisiblePosition &c)
{
Position p = c.deepEquivalent();
NodeImpl *node = p.node();
if (!node)
return VisiblePosition();
DocumentImpl *doc = node->getDocument();
if (!doc)
return VisiblePosition();
NodeImpl *docElem = doc->documentElement();
if (!node)
return VisiblePosition();
return VisiblePosition(docElem, docElem->childNodeCount(), DOWNSTREAM);
}
bool inSameDocument(const VisiblePosition &a, const VisiblePosition &b)
{
Position ap = a.deepEquivalent();
NodeImpl *an = ap.node();
if (!an)
return false;
Position bp = b.deepEquivalent();
NodeImpl *bn = bp.node();
if (an == bn)
return true;
return an->getDocument() == bn->getDocument();
}
bool isStartOfDocument(const VisiblePosition &p)
{
return p.isNotNull() && p.previous().isNull();
}
bool isEndOfDocument(const VisiblePosition &p)
{
return p.isNotNull() && p.next().isNull();
}
VisiblePosition startOfEditableContent(const VisiblePosition &c)
{
Position p = c.deepEquivalent();
NodeImpl *node = p.node();
if (!node)
return VisiblePosition();
return VisiblePosition(node->rootEditableElement(), 0, DOWNSTREAM);
}
VisiblePosition endOfEditableContent(const VisiblePosition &c)
{
Position p = c.deepEquivalent();
NodeImpl *node = p.node();
if (!node)
return VisiblePosition();
node = node->rootEditableElement();
if (!node)
return VisiblePosition();
return VisiblePosition(node, node->childNodeCount(), DOWNSTREAM);
}
bool inSameEditableContent(const VisiblePosition &a, const VisiblePosition &b)
{
Position ap = a.deepEquivalent();
NodeImpl *an = ap.node();
if (!an)
return false;
Position bp = b.deepEquivalent();
NodeImpl *bn = bp.node();
if (!bn)
return false;
if (!an->isContentEditable() || !bn->isContentEditable())
return false;
return an->rootEditableElement() == bn->rootEditableElement();
}
bool isStartOfEditableContent(const VisiblePosition &p)
{
return inSameEditableContent(p, p.previous());
}
bool isEndOfEditableContent(const VisiblePosition &p)
{
return inSameEditableContent(p, p.next());
}
}