static CssLineBox FindNearestLine(CssBox startBox, int globalY, int yRange)
{
CssLineBox latestLine = null;
CssBox latestLineBoxOwner = null;
float latestLineBoxGlobalYPos = 0;
foreach (CssLineBox lineBox in BoxHitUtils.GetDeepDownLineBoxIter(startBox))
{
if (lineBox.CacheLineHeight == 0)
{
continue;
}
if (latestLineBoxOwner != lineBox.OwnerBox)
{
//find global position of box
latestLineBoxOwner = lineBox.OwnerBox;
//TODO: review here , duplicate GetGlobalLocation
float gx, gy;
latestLineBoxOwner.GetGlobalLocation(out gx, out gy);
latestLineBoxGlobalYPos = gy;
}
float lineGlobalBottom = lineBox.CachedLineBottom + latestLineBoxGlobalYPos;
if (lineGlobalBottom <= globalY)
{
latestLine = lineBox;
}
else
{
latestLine = lineBox;
break;
}
}
return(latestLine);
}
public void MouseDown(UIMouseEventArgs e, CssBox startAt)
{
if (!_isBinded)
{
return;
}
if (startAt == null)
{
return;
}
//----------------------------------------------------
ClearPreviousSelection();
if (_latestMouseDownChain != null)
{
ReleaseHitChain(_latestMouseDownChain);
_latestMouseDownChain = null;
}
this.lastDomLayoutVersion = this._htmlContainer.LayoutVersion;
//----------------------------------------------------
int x = e.X;
int y = e.Y;
this._mouseDownStartAt = startAt;
this._mousedownX = x;
this._mousedownY = y;
CssBoxHitChain hitChain = GetFreeHitChain();
hitChain.SetRootGlobalPosition(x, y);
//1. hittest
BoxHitUtils.HitTest(startAt, x, y, hitChain);
//2. propagate events
SetEventOrigin(e, hitChain);
ForEachOnlyEventPortalBubbleUp(e, hitChain, (portal) =>
{
portal.PortalMouseDown(e);
return(true);
});
if (!e.CancelBubbling)
{
var prevMouseDownElement = this.currentMouseDown;
e.CurrentContextElement = this.currentMouseDown = null; //clear
ForEachEventListenerBubbleUp(e, hitChain, () =>
{
//TODO: check accept keyboard
this.currentMouseDown = e.CurrentContextElement;
e.CurrentContextElement.ListenMouseDown(e);
if (prevMouseDownElement != null &&
prevMouseDownElement != currentMouseDown)
{
prevMouseDownElement.ListenLostMouseFocus(e);
}
return(e.CancelBubbling);
});
}
//----------------------------------
//save mousedown hitchain
this._latestMouseDownChain = hitChain;
}
///// walk down and up
///// </summary>
///// <param name="startLine"></param>
///// <returns></returns>
//static IEnumerable<CssLineBox> GetLineWalkDownAndUpIter(LineWalkVisitor visitor, CssLineBox startLine)
//{
// float sx, sy;
// startLine.OwnerBox.GetGlobalLocation(out sx, out sy);
// CssLineBox curLine = startLine;
// //walk up and down the tree
// CssLineBox nextline = curLine.NextLine;
// while (nextline != null)
// {
// visitor._globalY = sy + startLine.CachedLineTop;
// yield return nextline;
// nextline = nextline.NextLine;
// }
// //--------------------
// //no next line
// //then walk up ***
// CssBox curBox = startLine.OwnerBox;
// RETRY://***
// CssBox level1Sibling = BoxHitUtils.GetNextSibling(curBox);
// while (level1Sibling != null)
// {
// level1Sibling.GetGlobalLocation(out sx, out sy);
// visitor._globalY = sy;
// //walk down
// foreach (CssLineBox line in GetLineWalkDownIter(visitor, level1Sibling))
// {
// yield return line;
// }
// level1Sibling = BoxHitUtils.GetNextSibling(level1Sibling);
// }
// //--------------------
// //other further sibling
// //then step to parent of lineOwner
// if (curBox.ParentBox != null)
// {
// //if has parent
// //walk up***
// curBox = curBox.ParentBox;
// goto RETRY;
// }
//}
/// walk down and up
/// </summary>
/// <param name="startLine"></param>
/// <returns></returns>
static IEnumerable <CssLineBox> GetLineWalkDownAndUpIter(LineWalkVisitor visitor, CssLineBox startLine)
{
PointF p = new PointF();
startLine.OwnerBox.GetGlobalLocationRelativeToRoot(ref p);
CssLineBox curLine = startLine;
//walk up and down the tree
CssLineBox nextline = curLine.NextLine;
while (nextline != null)
{
visitor._globalY = p.Y + startLine.CachedLineTop;
yield return(nextline);
nextline = nextline.NextLine;
}
//--------------------
//no next line
//then walk up ***
CssBox curBox = startLine.OwnerBox;
RETRY: //***
CssBox level1Sibling = BoxHitUtils.GetNextSibling(curBox);
while (level1Sibling != null)
{
p = new PointF();
level1Sibling.GetGlobalLocationRelativeToRoot(ref p);
visitor._globalY = p.Y;
//walk down
foreach (CssLineBox line in GetLineWalkDownIter(visitor, level1Sibling))
{
yield return(line);
}
level1Sibling = BoxHitUtils.GetNextSibling(level1Sibling);
}
//--------------------
//other further sibling
//then step to parent of lineOwner
if (curBox.ParentBox != null)
{
//if has parent
//walk up***
curBox = curBox.ParentBox;
goto RETRY;
}
}
/// walk down and up
/// </summary>
/// <param name="startLine"></param>
/// <returns></returns>
static IEnumerable <CssLineBox> GetLineWalkDownAndUpIter(LineWalkVisitor visitor, CssLineBox startLine)
{
float sx, sy;
startLine.OwnerBox.GetGlobalLocation(out sx, out sy);
CssLineBox curLine = startLine;
//walk up and down the tree
CssLineBox nextline = curLine.NextLine;
while (nextline != null)
{
visitor.globalY = sy + startLine.CachedLineTop;
yield return(nextline);
nextline = nextline.NextLine;
}
//--------------------
//no next line
//then walk up ***
CssBox curBox = startLine.OwnerBox;
RETRY:
CssBox level1Sibling = BoxHitUtils.GetNextSibling(curBox);
while (level1Sibling != null)
{
level1Sibling.GetGlobalLocation(out sx, out sy);
visitor.globalY = sy;
//walk down
foreach (var line in GetLineWalkDownIter(visitor, level1Sibling))
{
yield return(line);
}
level1Sibling = BoxHitUtils.GetNextSibling(level1Sibling);
}
//--------------------
//other further sibling
//then step to parent of lineOwner
if (curBox.ParentBox != null)
{
//if has parent
//walk up***
curBox = curBox.ParentBox;
goto RETRY;
}
}
public void MouseUp(UIMouseEventArgs e, CssBox startAt)
{
if (!_isBinded)
{
return;
}
if (startAt == null)
{
return;
}
//----------------------------------------------------
DateTime snapMouseUpTime = DateTime.Now;
TimeSpan timediff = snapMouseUpTime - lastimeMouseUp;
bool isAlsoDoubleClick = timediff.Milliseconds < DOUBLE_CLICK_SENSE;
this.lastimeMouseUp = snapMouseUpTime;
//-----------------------------------------
CssBoxHitChain hitChain = GetFreeHitChain();
hitChain.SetRootGlobalPosition(e.X, e.Y);
//1. prob hit chain only
BoxHitUtils.HitTest(startAt, e.X, e.Y, hitChain);
SetEventOrigin(e, hitChain);
//2. invoke css event and script event
ForEachOnlyEventPortalBubbleUp(e, hitChain, (portal) =>
{
portal.PortalMouseUp(e);
return(true);
});
if (!e.CancelBubbling)
{
ForEachEventListenerBubbleUp(e, hitChain, () =>
{
e.CurrentContextElement.ListenMouseUp(e);
return(e.CancelBubbling);
});
}
if (!e.IsCanceled)
{
//--------------------
//click or double click
//--------------------
if (isAlsoDoubleClick)
{
ForEachEventListenerBubbleUp(e, hitChain, () =>
{
e.CurrentContextElement.ListenMouseDoubleClick(e);
return(e.CancelBubbling);
});
}
else
{
ForEachEventListenerBubbleUp(e, hitChain, () =>
{
e.CurrentContextElement.ListenMouseClick(e);
return(e.CancelBubbling);
});
}
}
ReleaseHitChain(hitChain);
if (this._latestMouseDownChain != null)
{
this._latestMouseDownChain.Clear();
//Console.WriteLine(dbugNN++);
this._latestMouseDownChain = null;
}
}
public void MouseMove(UIMouseEventArgs e, CssBox startAt)
{
if (!_isBinded)
{
return;
}
if (startAt == null)
{
return;
}
//-----------------------------------------
int x = e.X;
int y = e.Y;
if (e.IsDragging && _latestMouseDownChain != null)
{
//dragging *** , if changed
if (this._mousedownX != x || this._mousedownY != y)
{
//handle mouse drag
CssBoxHitChain hitChain = GetFreeHitChain();
hitChain.SetRootGlobalPosition(x, y);
BoxHitUtils.HitTest(startAt, x, y, hitChain);
SetEventOrigin(e, hitChain);
//---------------------------------------------------------
//propagate mouse drag
ForEachOnlyEventPortalBubbleUp(e, hitChain, (portal) =>
{
portal.PortalMouseMove(e);
return(true);
});
//---------------------------------------------------------
if (!e.CancelBubbling)
{
ClearPreviousSelection();
if (_latestMouseDownChain.Count > 0 && hitChain.Count > 0)
{
if (this._htmlContainer.LayoutVersion != this.lastDomLayoutVersion)
{
//the dom has been changed so...
//need to evaluate hitchain at mousedown position again
int lastRootGlobalX = _latestMouseDownChain.RootGlobalX;
int lastRootGlobalY = _latestMouseDownChain.RootGlobalY;
_latestMouseDownChain.Clear();
_latestMouseDownChain.SetRootGlobalPosition(lastRootGlobalX, lastRootGlobalY);
BoxHitUtils.HitTest(_mouseDownStartAt, lastRootGlobalX, lastRootGlobalY, _latestMouseDownChain);
}
//create selection range
var newSelectionRange = new SelectionRange(
_latestMouseDownChain,
hitChain,
this.ifonts);
if (newSelectionRange.IsValid)
{
this._htmlContainer.SetSelection(newSelectionRange);
}
else
{
this._htmlContainer.SetSelection(null);
}
}
else
{
this._htmlContainer.SetSelection(null);
}
ForEachEventListenerBubbleUp(e, hitChain, () =>
{
e.CurrentContextElement.ListenMouseMove(e);
return(true);
});
}
//---------------------------------------------------------
ReleaseHitChain(hitChain);
}
}
else
{
//mouse move
//---------------------------------------------------------
CssBoxHitChain hitChain = GetFreeHitChain();
hitChain.SetRootGlobalPosition(x, y);
BoxHitUtils.HitTest(startAt, x, y, hitChain);
SetEventOrigin(e, hitChain);
//---------------------------------------------------------
ForEachOnlyEventPortalBubbleUp(e, hitChain, (portal) =>
{
portal.PortalMouseMove(e);
return(true);
});
//---------------------------------------------------------
if (!e.CancelBubbling)
{
ForEachEventListenerBubbleUp(e, hitChain, () =>
{
e.CurrentContextElement.ListenMouseMove(e);
return(true);
});
}
ReleaseHitChain(hitChain);
}
}
public void MouseDown(UIMouseDownEventArgs e, CssBox startAt)
{
if (!_isBinded)
{
return;
}
if (startAt == null)
{
return;
}
//----------------------------------------------------
if (!e.Shift)
{
ClearPreviousSelection();
}
if (_latestMouseDownChain != null)
{
ReleaseHitChain(_latestMouseDownChain);
_latestMouseDownChain = null;
}
_lastDomLayoutVersion = _htmlVisualRoot.LayoutVersion;
//----------------------------------------------------
int x = e.X;
int y = e.Y;
_mouseDownStartAt = startAt;
_mousedownX = x;
_mousedownY = y;
CssBoxHitChain hitChain = GetFreeHitChain();
#if DEBUG
hitChain.debugEventPhase = CssBoxHitChain.dbugEventPhase.MouseDown;
#endif
hitChain.SetRootGlobalPosition(x, y);
//1. hittest
BoxHitUtils.HitTest(startAt, x, y, hitChain);
//2. propagate events
SetEventOrigin(e, hitChain);
ForEachOnlyEventPortalBubbleUp(e, hitChain, portal =>
{
portal.PortalMouseDown(e);
return(true);
});
if (!e.CancelBubbling)
{
IUIEventListener prevMouseDownElement = _currentMouseDown;
_currentMouseDown = null; //clear
e.SetCurrentContextElement(null);
ForEachEventListenerBubbleUp(e, hitChain, () =>
{
//TODO: check accept keyboard
_currentMouseDown = e.CurrentContextElement;
e.CurrentContextElement.ListenMouseDown(e);
if (prevMouseDownElement != null &&
prevMouseDownElement != _currentMouseDown)
{
prevMouseDownElement.ListenLostMouseFocus(_mouseLostFocus);
}
return(e.CancelBubbling);
});
}
//----------------------------------
//save mousedown hitchain
_latestMouseDownChain = hitChain;
}
public void MouseMove(UIMouseMoveEventArgs e, CssBox startAt)
{
if (!_isBinded)
{
return;
}
if (startAt == null)
{
return;
}
//-----------------------------------------
int x = e.X;
int y = e.Y;
if (e.IsDragging && _latestMouseDownChain != null)
{
//dragging *** , if changed
if (_mousedownX != x || _mousedownY != y)
{
//handle mouse drag
CssBoxHitChain hitChain = GetFreeHitChain();
#if DEBUG
hitChain.debugEventPhase = CssBoxHitChain.dbugEventPhase.MouseMove;
#endif
hitChain.SetRootGlobalPosition(x, y);
BoxHitUtils.HitTest(startAt, x, y, hitChain);
SetEventOrigin(e, hitChain);
//---------------------------------------------------------
//propagate mouse drag
ForEachOnlyEventPortalBubbleUp(e, hitChain, (portal) =>
{
portal.PortalMouseMove(e);
return(true);
});
//---------------------------------------------------------
if (!e.CancelBubbling)
{
ClearPreviousSelection();
if (_latestMouseDownChain.Count > 0 && hitChain.Count > 0)
{
if (_htmlVisualRoot.LayoutVersion != _lastDomLayoutVersion)
{
//the dom has been changed so...
//need to evaluate hitchain at mousedown position again
int lastRootGlobalX = _latestMouseDownChain.RootGlobalX;
int lastRootGlobalY = _latestMouseDownChain.RootGlobalY;
_latestMouseDownChain.Clear();
_latestMouseDownChain.SetRootGlobalPosition(lastRootGlobalX, lastRootGlobalY);
BoxHitUtils.HitTest(_mouseDownStartAt, lastRootGlobalX, lastRootGlobalY, _latestMouseDownChain);
}
//create selection range
var newSelectionRange = new SelectionRange(
_latestMouseDownChain,
hitChain,
_textService);
if (newSelectionRange.IsValid)
{
_htmlVisualRoot.SetSelection(newSelectionRange);
}
else
{
_htmlVisualRoot.SetSelection(null);
}
}
else
{
_htmlVisualRoot.SetSelection(null);
}
ForEachEventListenerBubbleUp(e, hitChain, () =>
{
e.CurrentContextElement.ListenMouseMove(e);
return(true);
});
}
//---------------------------------------------------------
ReleaseHitChain(hitChain);
}
}
else
{
//mouse move
//---------------------------------------------------------
CssBoxHitChain hitChain = GetFreeHitChain();
#if DEBUG
hitChain.debugEventPhase = CssBoxHitChain.dbugEventPhase.MouseMove;
#endif
hitChain.SetRootGlobalPosition(x, y);
BoxHitUtils.HitTest(startAt, x, y, hitChain);
SetEventOrigin(e, hitChain);
//---------------------------------------------------------
ForEachOnlyEventPortalBubbleUp(e, hitChain, (portal) =>
{
portal.PortalMouseMove(e);
return(true);
});
//---------------------------------------------------------
if (!e.CancelBubbling)
{
ForEachEventListenerBubbleUp(e, hitChain, () =>
{
e.CurrentContextElement.ListenMouseMove(e);
return(true);
});
}
var cssbox = e.ExactHitObject as HtmlBoxes.CssBox;
if (cssbox != null)
{
switch (cssbox.CursorName)
{
case Css.CssCursorName.IBeam:
if (e.MouseCursorStyle != MouseCursorStyle.IBeam)
{
e.MouseCursorStyle = MouseCursorStyle.IBeam;
}
break;
case Css.CssCursorName.Hand:
case Css.CssCursorName.Pointer:
if (e.MouseCursorStyle != MouseCursorStyle.Pointer)
{
e.MouseCursorStyle = MouseCursorStyle.Pointer;
}
break;
case Css.CssCursorName.Default:
if (e.MouseCursorStyle != MouseCursorStyle.Default)
{
e.MouseCursorStyle = MouseCursorStyle.Default;
}
break;
}
}
else
{
var cssspan = e.ExactHitObject as HtmlBoxes.CssTextRun;
if (cssspan != null)
{
cssbox = cssspan.OwnerBox;
switch (cssbox.CursorName)
{
default:
e.MouseCursorStyle = MouseCursorStyle.IBeam;
break;
case Css.CssCursorName.Hand:
case Css.CssCursorName.Pointer:
if (e.MouseCursorStyle != MouseCursorStyle.Pointer)
{
e.MouseCursorStyle = MouseCursorStyle.Pointer;
}
break;
}
}
}
ReleaseHitChain(hitChain);
}
}
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)
{
#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);
}
