Ejemplo n.º 1
0
/*
 * Reconstruct the vertical margin before the line |aLine| in order to
 * do an incremental reflow that begins with |aLine| without reflowing
 * the line before it.  |aLine| may point to the fencepost at the end of
 * the line list, and it is used this way since we (for now, anyway)
 * always need to recover margins at the end of a block.
 *
 * The reconstruction involves walking backward through the line list to
 * find any collapsed margins preceding the line that would have been in
 * the reflow state's |mPrevBEndMargin| when we reflowed that line in
 * a full reflow (under the rule in CSS2 that all adjacent vertical
 * margins of blocks collapse).
 */
void
nsBlockReflowState::ReconstructMarginBefore(nsLineList::iterator aLine)
{
  mPrevBEndMargin.Zero();
  nsBlockFrame *block = mBlock;

  nsLineList::iterator firstLine = block->begin_lines();
  for (;;) {
    --aLine;
    if (aLine->IsBlock()) {
      mPrevBEndMargin = aLine->GetCarriedOutBEndMargin();
      break;
    }
    if (!aLine->IsEmpty()) {
      break;
    }
    if (aLine == firstLine) {
      // If the top margin was carried out (and thus already applied),
      // set it to zero.  Either way, we're done.
      if (!GetFlag(BRS_ISBSTARTMARGINROOT)) {
        mPrevBEndMargin.Zero();
      }
      break;
    }
  }
}
Ejemplo n.º 2
0
/*
 * Reconstruct the vertical margin before the line |aLine| in order to
 * do an incremental reflow that begins with |aLine| without reflowing
 * the line before it.  |aLine| may point to the fencepost at the end of
 * the line list, and it is used this way since we (for now, anyway)
 * always need to recover margins at the end of a block.
 *
 * The reconstruction involves walking backward through the line list to
 * find any collapsed margins preceding the line that would have been in
 * the reflow state's |mPrevBEndMargin| when we reflowed that line in
 * a full reflow (under the rule in CSS2 that all adjacent vertical
 * margins of blocks collapse).
 */
void
BlockReflowInput::ReconstructMarginBefore(nsLineList::iterator aLine)
{
  mPrevBEndMargin.Zero();
  nsBlockFrame *block = mBlock;

  nsLineList::iterator firstLine = block->LinesBegin();
  for (;;) {
    --aLine;
    if (aLine->IsBlock()) {
      mPrevBEndMargin = aLine->GetCarriedOutBEndMargin();
      break;
    }
    if (!aLine->IsEmpty()) {
      break;
    }
    if (aLine == firstLine) {
      // If the top margin was carried out (and thus already applied),
      // set it to zero.  Either way, we're done.
      if (!mFlags.mIsBStartMarginRoot) {
        mPrevBEndMargin.Zero();
      }
      break;
    }
  }
}