static IEnumerable <CssLineBox> GetLineWalkDownIter(LineWalkVisitor visitor, CssBox box)
{
//recursive
float y = visitor._globalY;
if (box.LineBoxCount > 0)
{
foreach (CssLineBox linebox in box.GetLineBoxIter())
{
visitor._globalY = y + linebox.CachedLineTop;
yield return(linebox);
}
}
else
{
//element based
foreach (CssBox childbox in box.GetChildBoxIter())
{
visitor._globalY = y + childbox.LocalY;
//recursive
foreach (var linebox in GetLineWalkDownIter(visitor, childbox))
{
yield return(linebox);
}
}
}
visitor._globalY = y;
}
internal static CssLineBox GetNearestLine(CssBox a, Point point, out bool found)
{
if (a.LineBoxCount > 0)
{
CssLineBox latestLine = null;
int y = point.Y;
found = false;
foreach (CssLineBox linebox in a.GetLineBoxIter())
{
if (linebox.CachedLineBottom < y)
{
latestLine = linebox;
}
else
{
if (latestLine != null)
{
found = true;
}
break;
}
}
return(latestLine);
}
else
{
bool foundExact = false;
CssLineBox lastLine = null;
foreach (CssBox cbox in a.GetChildBoxIter())
{
CssLineBox candidateLine = GetNearestLine(cbox, point, out foundExact);
if (candidateLine != null)
{
if (foundExact)
{
found = true;
return(lastLine);
}
//not exact
lastLine = candidateLine;
}
else
{
if (lastLine != null)
{
found = false;
return(lastLine);
}
}
}
found = foundExact;
}
return(null);
}
internal static IEnumerable <CssLineBox> GetDeepDownLineBoxIter(CssBox box)
{
if (box.LineBoxCount > 0)
{
foreach (CssLineBox linebox in box.GetLineBoxIter())
{
yield return(linebox);
}
}
else
{
if (box.ChildCount > 0)
{
foreach (CssBox child in box.GetChildBoxIter())
{
foreach (CssLineBox linebox in GetDeepDownLineBoxIter(child))
{
yield return(linebox);
}
}
}
}
}
public static bool HitTest(CssBox box, float x, float y, CssBoxHitChain hitChain)
{
//--------------------------------------
float boxHitLocalX = x - box.LocalX;
float boxHitLocalY = y - box.LocalY;
bool isPointInArea = box.IsPointInArea(x, y);
//----------------------------------------------------------------------
if (isPointInArea)
{
hitChain.AddHit(box, (int)boxHitLocalX, (int)boxHitLocalY);
}
//check absolute layer first ***
if (box.HasAbsoluteLayer)
{
hitChain.PushContextBox(box);
foreach (var absBox in box.GetAbsoluteChildBoxBackwardIter())
{
if (HitTest(absBox, boxHitLocalX, boxHitLocalY, hitChain))
{
//found hit
hitChain.PopContextBox(box);
return(true);
}
}
hitChain.PopContextBox(box);
}
//----------------------------------------------------------------------
if (!isPointInArea)
{
switch (box.CssDisplay)
{
case Css.CssDisplay.TableRow:
{
foreach (var childBox in box.GetChildBoxIter())
{
if (HitTest(childBox, x, y, hitChain))
{
return(true);
}
}
} break;
}
//exit
return(false);
}
//----------------------------------------------------------------------
//at here point is in the area***
hitChain.PushContextBox(box);
if (box.IsCustomCssBox)
{
//custom css box
//return true= stop here
if (box.CustomContentHitTest(x, y, hitChain))
{
hitChain.PopContextBox(box);
return(true);
}
}
if (box.LineBoxCount > 0)
{
bool foundSomeLine = false;
foreach (var lineBox in box.GetLineBoxIter())
{
//line box not overlap
if (lineBox.HitTest(boxHitLocalX, boxHitLocalY))
{
foundSomeLine = true;
float lineBoxLocalY = boxHitLocalY - lineBox.CachedLineTop;
//2.
hitChain.AddHit(lineBox, (int)boxHitLocalX, (int)lineBoxLocalY);
var foundRun = BoxHitUtils.GetCssRunOnLocation(lineBox, (int)boxHitLocalX, (int)lineBoxLocalY);
if (foundRun != null)
{
//3.
hitChain.AddHit(foundRun, (int)(boxHitLocalX - foundRun.Left), (int)lineBoxLocalY);
//4. go deeper for block run
if (foundRun.Kind == CssRunKind.BlockRun)
{
var blockRun = (CssBlockRun)foundRun;
CssLineBox hostLine = blockRun.HostLine;
//adjust with hostline
HitTest(((CssBlockRun)foundRun).ContentBox, (int)(boxHitLocalX - foundRun.Left), boxHitLocalY - hostLine.CachedLineTop, hitChain);
}
}
//found line box
hitChain.PopContextBox(box);
return(true);
}
else if (foundSomeLine)
{
return(false);
}
}
}
else
{
//iterate in child
foreach (var childBox in box.GetChildBoxIter())
{
if (HitTest(childBox, boxHitLocalX, boxHitLocalY, hitChain))
{
//recursive
hitChain.PopContextBox(box);
return(true);
}
}
}
hitChain.PopContextBox(box);
return(true);
}
public static bool HitTest(CssBox box, float x, float y, CssBoxHitChain hitChain)
{
//--------------------------------------
float boxHitLocalX = x - box.LocalX;
float boxHitLocalY = y - box.LocalY;
bool isPointInArea = box.IsPointInArea(x, y);
//----------------------------------------------------------------------
if (isPointInArea)
{
hitChain.AddHit(box, (int)boxHitLocalX, (int)boxHitLocalY);
}
//check absolute layer first ***
if (box.HasAbsoluteLayer)
{
hitChain.PushContextBox(box);
foreach (var absBox in box.GetAbsoluteChildBoxBackwardIter())
{
if (HitTest(absBox, boxHitLocalX, boxHitLocalY, hitChain))
{
//found hit
hitChain.PopContextBox(box);
return true;
}
}
hitChain.PopContextBox(box);
}
//----------------------------------------------------------------------
if (!isPointInArea)
{
switch (box.CssDisplay)
{
case Css.CssDisplay.TableRow:
{
foreach (var childBox in box.GetChildBoxIter())
{
if (HitTest(childBox, x, y, hitChain))
{
return true;
}
}
}
break;
}
//exit
return false;
}
//----------------------------------------------------------------------
//at here point is in the area***
hitChain.PushContextBox(box);
if (box.IsCustomCssBox)
{
//custom css box
//return true= stop here
if (box.CustomContentHitTest(x, y, hitChain))
{
hitChain.PopContextBox(box);
return true;
}
}
if (box.LineBoxCount > 0)
{
bool foundSomeLine = false;
foreach (var lineBox in box.GetLineBoxIter())
{
//line box not overlap
if (lineBox.HitTest(boxHitLocalX, boxHitLocalY))
{
foundSomeLine = true;
float lineBoxLocalY = boxHitLocalY - lineBox.CachedLineTop;
//2.
hitChain.AddHit(lineBox, (int)boxHitLocalX, (int)lineBoxLocalY);
var foundRun = BoxHitUtils.GetCssRunOnLocation(lineBox, (int)boxHitLocalX, (int)lineBoxLocalY);
if (foundRun != null)
{
//3.
hitChain.AddHit(foundRun, (int)(boxHitLocalX - foundRun.Left), (int)lineBoxLocalY);
//4. go deeper for block run
if (foundRun.Kind == CssRunKind.BlockRun)
{
var blockRun = (CssBlockRun)foundRun;
CssLineBox hostLine = blockRun.HostLine;
//adjust with hostline
HitTest(((CssBlockRun)foundRun).ContentBox, (int)(boxHitLocalX - foundRun.Left), boxHitLocalY - hostLine.CachedLineTop, hitChain);
}
}
//found line box
hitChain.PopContextBox(box);
return true;
}
else if (foundSomeLine)
{
return false;
}
}
}
else
{
//iterate in child
foreach (var childBox in box.GetChildBoxIter())
{
if (HitTest(childBox, boxHitLocalX, boxHitLocalY, hitChain))
{
//recursive
hitChain.PopContextBox(box);
return true;
}
}
}
hitChain.PopContextBox(box);
return true;
}
internal static IEnumerable<CssLineBox> GetDeepDownLineBoxIter(CssBox box)
{
if (box.LineBoxCount > 0)
{
foreach (CssLineBox linebox in box.GetLineBoxIter())
{
yield return linebox;
}
}
else
{
if (box.ChildCount > 0)
{
foreach (CssBox child in box.GetChildBoxIter())
{
foreach (CssLineBox linebox in GetDeepDownLineBoxIter(child))
{
yield return linebox;
}
}
}
}
}
internal static CssLineBox GetNearestLine(CssBox a, Point point, out bool found)
{
if (a.LineBoxCount > 0)
{
CssLineBox latestLine = null;
int y = point.Y;
found = false;
foreach (CssLineBox linebox in a.GetLineBoxIter())
{
if (linebox.CachedLineBottom < y)
{
latestLine = linebox;
}
else
{
if (latestLine != null)
{
found = true;
}
break;
}
}
return latestLine;
}
else
{
bool foundExact = false;
CssLineBox lastLine = null;
foreach (CssBox cbox in a.GetChildBoxIter())
{
CssLineBox candidateLine = GetNearestLine(cbox, point, out foundExact);
if (candidateLine != null)
{
if (foundExact)
{
found = true;
return lastLine;
}
//not exact
lastLine = candidateLine;
}
else
{
if (lastLine != null)
{
found = false;
return lastLine;
}
}
}
found = foundExact;
}
return null;
}
static IEnumerable<CssLineBox> GetLineWalkDownIter(LineWalkVisitor visitor, CssBox box)
{
//recursive
float y = visitor.globalY;
if (box.LineBoxCount > 0)
{
foreach (var linebox in box.GetLineBoxIter())
{
visitor.globalY = y + linebox.CachedLineTop;
yield return linebox;
}
}
else
{
//element based
foreach (var childbox in box.GetChildBoxIter())
{
visitor.globalY = y + childbox.LocalY;
//recursive
foreach (var linebox in GetLineWalkDownIter(visitor, childbox))
{
yield return linebox;
}
}
}
visitor.globalY = y;
}
/// <summary>
/// do layout line formatting context
/// </summary>
/// <param name="hostBlock"></param>
/// <param name="lay"></param>
public static void DoLayoutLinesContext(CssBox hostBlock, LayoutVisitor lay)
{
//this in line formatting context
//*** hostBlock must confirm that it has all inline children
hostBlock.SetHeightToZero();
hostBlock.ResetLineBoxes();
//----------------------------------------------------------------------------------------
float limitLocalRight = hostBlock.VisualWidth - (hostBlock.ActualPaddingRight + hostBlock.ActualBorderRightWidth);
float localX = hostBlock.ActualTextIndent + hostBlock.ActualPaddingLeft + hostBlock.ActualBorderLeftWidth;
float localY = hostBlock.ActualPaddingTop + hostBlock.ActualBorderTopWidth;
//----------------------------------------------------------------------------------------
if (lay.HasFloatBoxInContext)
{
var recentLeftFloatBox = lay.LatestLeftFloatBox;
var recentRightFloatBox = lay.LatestRightFloatBox;
var latestSibling = lay.LatestSiblingBox;
if (latestSibling != null)
{
//check latest sibling first
if (hostBlock.Float == CssFloat.None)
{
if (recentLeftFloatBox != null)
{
if (hostBlock.LocalY < recentLeftFloatBox.LocalVisualBottom)
{
localX = recentLeftFloatBox.LocalVisualRight;
}
}
else
{
}
}
}
else
{
if (hostBlock.Float == CssFloat.None)
{
if (recentLeftFloatBox != null)
{
localX = recentLeftFloatBox.LocalVisualRight;
}
if (recentRightFloatBox != null)
{
limitLocalRight = recentRightFloatBox.LocalX;
}
}
//check if need newline or not
}
}
int interlineSpace = 0;
//First line box
var line = new CssLineBox(hostBlock);
hostBlock.AddLineBox(line);
//****
var floatCtx = new FloatFormattingContext();
FlowBoxContentIntoHostLineFmtContext(lay, hostBlock, hostBlock,
limitLocalRight, localX,
ref line, ref localX, ref floatCtx);
//****
// if width is not restricted we need to lower it to the actual width
if (hostBlock.VisualWidth + lay.ContainerBlockGlobalX >= CssBoxConstConfig.BOX_MAX_RIGHT)
{
float newWidth = localX + hostBlock.ActualPaddingRight + hostBlock.ActualBorderRightWidth;// CssBox.MAX_RIGHT - (args.ContainerBlockGlobalX + blockBox.LocalX);
if (newWidth <= CSS_OFFSET_THRESHOLD)
{
newWidth = CSS_OFFSET_THRESHOLD;
}
hostBlock.SetVisualWidth(newWidth);
}
//---------------------
float maxLineWidth = 0;
if (hostBlock.CssDirection == CssDirection.Rtl)
{
CssTextAlign textAlign = hostBlock.CssTextAlign;
foreach (CssLineBox linebox in hostBlock.GetLineBoxIter())
{
ApplyAlignment(linebox, textAlign, lay);
ApplyRightToLeft(linebox); //***
linebox.CloseLine(lay); //***
linebox.CachedLineTop = localY;
localY += linebox.CacheLineHeight + interlineSpace; // + interline space?
if (maxLineWidth < linebox.CachedExactContentWidth)
{
maxLineWidth = linebox.CachedExactContentWidth;
}
}
}
else
{
CssTextAlign textAlign = hostBlock.CssTextAlign;
foreach (CssLineBox linebox in hostBlock.GetLineBoxIter())
{
ApplyAlignment(linebox, textAlign, lay);
linebox.CloseLine(lay); //***
linebox.CachedLineTop = localY;
localY += linebox.CacheLineHeight + interlineSpace;
if (maxLineWidth < linebox.CachedExactContentWidth)
{
maxLineWidth = linebox.CachedExactContentWidth;
}
}
}
hostBlock.SetVisualHeight(localY + hostBlock.ActualPaddingBottom + hostBlock.ActualBorderBottomWidth);
//final
SetFinalInnerContentSize(hostBlock, maxLineWidth, hostBlock.VisualHeight, lay);
}
public static bool HitTest(CssBox box, float x, float y, CssBoxHitChain hitChain)
{
#if DEBUG
//if (box.ViewportY != 0 && hitChain.debugEventPhase == CssBoxHitChain.dbugEventPhase.MouseDown)
//{
//}
#endif
//--------------------------------------
bool isPointInArea = box.IsPointInArea(x, y);
float boxHitLocalX = x - box.LocalX; //**
float boxHitLocalY = y - box.LocalY; //**
//----------------------------------------------------------------------
if (isPointInArea)
{
hitChain.AddHit(box, (int)boxHitLocalX, (int)boxHitLocalY);
}
//----------------------------------------------------------------------
//enter children space -> offset with its viewport
boxHitLocalX += box.ViewportX;
boxHitLocalY += box.ViewportY;
//check absolute layer first ***
if (box.HasAbsoluteLayer)
{
hitChain.PushContextBox(box);
foreach (CssBox absBox in box.GetAbsoluteChildBoxBackwardIter())
{
if (HitTest(absBox, boxHitLocalX, boxHitLocalY, hitChain))
{
//found hit
hitChain.PopContextBox(box);
return(true);
}
}
hitChain.PopContextBox(box);
}
//----------------------------------------------------------------------
if (!isPointInArea)
{
switch (box.CssDisplay)
{
case Css.CssDisplay.TableRow:
{
foreach (CssBox childBox in box.GetChildBoxIter())
{
if (HitTest(childBox, boxHitLocalX, boxHitLocalY, hitChain))
{
return(true);
}
}
}
break;
}
//exit
return(false);
}
//----------------------------------------------------------------------
//at here point is in the area***
hitChain.PushContextBox(box);
if (box.IsCustomCssBox)
{
//custom css box
//return true= stop here
if (box.CustomContentHitTest(boxHitLocalX, boxHitLocalY, hitChain))
{
hitChain.PopContextBox(box);
return(true);
}
}
if (box.LineBoxCount > 0)
{
bool foundSomeLine = false;
foreach (CssLineBox lineBox in box.GetLineBoxIter())
{
//line box not overlap
if (lineBox.HitTest(boxHitLocalX, boxHitLocalY))
{
foundSomeLine = true;
float lineBoxLocalY = boxHitLocalY - lineBox.CachedLineTop;
//2.
hitChain.AddHit(lineBox, (int)boxHitLocalX, (int)lineBoxLocalY);
CssRun foundRun = BoxHitUtils.GetCssRunOnLocation(lineBox, (int)boxHitLocalX, (int)lineBoxLocalY);
//CssRun foundRun = BoxHitUtils.GetCssRunOnLocation(lineBox, (int)x, (int)y);
if (foundRun != null)
{
//3.
hitChain.AddHit(foundRun, (int)(boxHitLocalX - foundRun.Left), (int)lineBoxLocalY);
//4. go deeper for block run
if (foundRun.Kind == CssRunKind.BlockRun)
{
CssBlockRun blockRun = (CssBlockRun)foundRun;
CssLineBox hostLine = blockRun.HostLine;
//adjust with hostline
HitTest(blockRun.ContentBox,
(int)(boxHitLocalX + blockRun.ContentBox.LocalX - foundRun.Left),
(int)(boxHitLocalY - hostLine.CachedLineTop),
hitChain);
}
}
//found line box
hitChain.PopContextBox(box);
return(true);
}
else if (foundSomeLine)
{
return(false);
}
}
}
else
{
//iterate in child
//foreach (var childBox in box.GetChildBoxIter())
foreach (CssBox childBox in box.GetChildBoxBackwardIter())
{
if (HitTest(childBox, boxHitLocalX, boxHitLocalY, hitChain))
{
//recursive
hitChain.PopContextBox(box);
return(true);
}
}
}
hitChain.PopContextBox(box);
return(true);
}
