ScrollDirection?GetScrollDirection(MouseLocation mouseLoc, out TimeSpan interval)
{
// Give prio to scrolling up/down (more common than scrolling left/right)
if (mouseLoc.Point.Y < wpfTextView.ViewportTop)
{
interval = GetVerticalInterval(mouseLoc.Point.Y - wpfTextView.ViewportTop);
return(ScrollDirection.Up);
}
if (mouseLoc.Point.Y >= wpfTextView.ViewportBottom)
{
interval = GetVerticalInterval(mouseLoc.Point.Y - wpfTextView.ViewportBottom);
return(ScrollDirection.Down);
}
if (mouseLoc.Point.X < wpfTextView.ViewportLeft)
{
interval = GetHorizontalInterval(mouseLoc.Point.X - wpfTextView.ViewportLeft);
return(ScrollDirection.Left);
}
if (mouseLoc.Point.X >= wpfTextView.ViewportRight)
{
interval = GetHorizontalInterval(mouseLoc.Point.X - wpfTextView.ViewportRight);
return(ScrollDirection.Right);
}
interval = TimeSpan.Zero;
return(null);
}
protected override void OnMouseMove(MouseEventArgs e)
{
if (mouseCaptured)
{
var mouseLoc = MouseLocation.Create(wpfTextViewHost.TextView, e, insertionPosition: false);
var line = mouseLoc.TextViewLine;
editorOperations.SelectLine(line, true);
// Needed or the scrolling will stop
if (mouseLoc.Point.Y <= wpfTextViewHost.TextView.ViewportTop)
{
editorOperations.ScrollUpAndMoveCaretIfNecessary();
}
else if (mouseLoc.Point.Y >= wpfTextViewHost.TextView.ViewportBottom)
{
var lastVisLine = wpfTextViewHost.TextView.TextViewLines.LastVisibleLine;
if (!lastVisLine.IsLastDocumentLine() || lastVisLine.VisibilityState != VisibilityState.FullyVisible)
{
editorOperations.ScrollDownAndMoveCaretIfNecessary();
}
}
e.Handled = true;
return;
}
base.OnMouseMove(e);
}
void SelectToMousePosition(MouseLocation mouseLoc, bool extendSelection, bool allowVirtualSpace) {
UpdateSelectionMode();
var snapshotLine = mouseLoc.TextViewLine.Start.GetContainingLine();
editorOperations.MoveCaret(mouseLoc.TextViewLine, mouseLoc.Point.X, extendSelection);
if (wpfTextView.Selection.Mode == TextSelectionMode.Box)
allowVirtualSpace = true;
// The caret can move to an auto-indented location if the line is empty. Move to
// the first character if the user clicked somewhere before the auto-indented location.
if (!allowVirtualSpace && snapshotLine.Length == 0 && mouseLoc.Point.X < wpfTextView.Caret.Left)
editorOperations.MoveCaret(mouseLoc.TextViewLine, 0, extendSelection);
}
void WpfTextView_MouseMove(object sender, MouseEventArgs e)
{
if (owner.IsClosed || owner.IsMouseOverOverlayLayerElement(e))
{
ClearMouseHoverPositionAndStopTimer();
return;
}
if (e.LeftButton != MouseButtonState.Released || e.RightButton != MouseButtonState.Released || e.MiddleButton != MouseButtonState.Released)
{
return;
}
var loc = MouseLocation.TryCreateTextOnly(owner, e);
int?newPosition;
if (loc == null)
{
newPosition = null;
}
else if (loc.Position.IsInVirtualSpace)
{
newPosition = null;
}
else if (!(loc.TextViewLine.TextTop <= loc.Point.Y && loc.Point.Y < loc.TextViewLine.TextBottom))
{
newPosition = null;
}
else if (!(loc.TextViewLine.TextLeft <= loc.Point.X && loc.Point.X < loc.TextViewLine.TextRight))
{
newPosition = null;
}
else
{
int pos = loc.Position.Position.Position;
if (loc.Affinity == PositionAffinity.Predecessor && pos != 0)
{
pos--;
}
newPosition = pos;
}
if (newPosition != position)
{
position = newPosition;
StopTimer();
foreach (var h in handlers)
{
h.Raised = false;
}
UpdateTimer();
}
}
protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
{
if (CaptureMouse())
{
var line = MouseLocation.Create(wpfTextViewHost.TextView, e, insertionPosition: false).TextViewLine;
editorOperations.SelectLine(line, (Keyboard.Modifiers & ModifierKeys.Shift) != 0);
mouseCaptured = true;
e.Handled = true;
return;
}
base.OnMouseLeftButtonDown(e);
}
IMappingTagSpan <IUrlTag> GetUriSpan(MouseEventArgs e)
{
if (!IsControlDown)
{
return(null);
}
var loc = MouseLocation.Create(wpfTextView, e, insertionPosition: false);
if (loc.Position.VirtualSpaces > 0)
{
return(null);
}
return(UriHelper.GetUri(viewTagAggregatorFactoryService, wpfTextView, loc.Position.Position));
}
SnapshotSpan?GetUriSpan(MouseEventArgs e)
{
if (!IsControlDown)
{
return(null);
}
var loc = MouseLocation.Create(wpfTextView, e);
if (loc.Position.VirtualSpaces > 0)
{
return(null);
}
return(UriHelper.GetUri(viewTagAggregatorFactoryService, wpfTextView, loc.Position.Position));
}
void SelectToMousePosition(MouseLocation mouseLoc, bool extendSelection, bool allowVirtualSpace)
{
UpdateSelectionMode();
var snapshotLine = mouseLoc.TextViewLine.Start.GetContainingLine();
editorOperations.MoveCaret(mouseLoc.TextViewLine, mouseLoc.Point.X, extendSelection);
if (wpfTextView.Selection.Mode == TextSelectionMode.Box)
{
allowVirtualSpace = true;
}
// The caret can move to an auto-indented location if the line is empty. Move to
// the first character if the user clicked somewhere before the auto-indented location.
if (!allowVirtualSpace && snapshotLine.Length == 0 && mouseLoc.Point.X < wpfTextView.Caret.Left)
{
editorOperations.MoveCaret(mouseLoc.TextViewLine, 0, extendSelection);
}
}
static TextEditorPosition GetTextEditorPositionFromMouse(IWpfTextView textView)
{
if (!textView.VisualElement.IsVisible)
{
return(null);
}
var loc = MouseLocation.Create(textView, new MouseEventArgs(Mouse.PrimaryDevice, 0), insertionPosition: true);
if (loc.Point.Y < textView.ViewportTop || loc.Point.Y >= textView.ViewportBottom)
{
return(null);
}
if (loc.Point.X < textView.ViewportLeft || loc.Point.X >= textView.ViewportRight)
{
return(null);
}
return(new TextEditorPosition(loc.Position));
}
MouseLocation GetLocation(MouseEventArgs e) => MouseLocation.Create(wpfTextView, e, insertionPosition: true);
ScrollDirection? GetScrollDirection(MouseLocation mouseLoc, out TimeSpan interval) {
// Give prio to scrolling up/down (more common than scrolling left/right)
if (mouseLoc.Point.Y < wpfTextView.ViewportTop) {
interval = GetVerticalInterval(mouseLoc.Point.Y - wpfTextView.ViewportTop);
return ScrollDirection.Up;
}
if (mouseLoc.Point.Y >= wpfTextView.ViewportBottom) {
interval = GetVerticalInterval(mouseLoc.Point.Y - wpfTextView.ViewportBottom);
return ScrollDirection.Down;
}
if (mouseLoc.Point.X < wpfTextView.ViewportLeft) {
interval = GetHorizontalInterval(mouseLoc.Point.X - wpfTextView.ViewportLeft);
return ScrollDirection.Left;
}
if (mouseLoc.Point.X >= wpfTextView.ViewportRight) {
interval = GetHorizontalInterval(mouseLoc.Point.X - wpfTextView.ViewportRight);
return ScrollDirection.Right;
}
interval = TimeSpan.Zero;
return null;
}
MouseLocation GetLocation(MouseEventArgs e) => MouseLocation.Create(wpfTextView, e);