NavigationFilter can be used to restrict where the cursor can be positioned. When the default cursor positioning actions attempt to reposition the cursor they will call into the NavigationFilter, assuming the JTextComponent has a non-null NavigationFilter set. In this manner the NavigationFilter can effectively restrict where the cursor can be positioned. Similarly DefaultCaret will call into the NavigationFilter when the user is changing the selection to further restrict where the cursor can be positioned.
Subclasses can conditionally call into supers implementation to restrict where the cursor can be placed, or call directly into the FilterBypass.
NavigationFilter can be used to restrict where the cursor can be positioned. When the default cursor positioning actions attempt to reposition the cursor they will call into the NavigationFilter, assuming the JTextComponent has a non-null NavigationFilter set. In this manner the NavigationFilter can effectively restrict where the cursor can be positioned. Similarly DefaultCaret will call into the NavigationFilter when the user is changing the selection to further restrict where the cursor can be positioned. Subclasses can conditionally call into supers implementation to restrict where the cursor can be placed, or call directly into the FilterBypass.
(get-next-visual-position-from this text pos bias direction bias-ret)
Returns the next visual position to place the caret at from an existing position. The default implementation simply forwards the method to the root View. Subclasses may wish to further restrict the location based on additional criteria.
text - JTextComponent containing text - javax.swing.text.JTextComponent
pos - Position used in determining next position - int
bias - Bias used in determining next position - javax.swing.text.Position$Bias
direction - the direction from the current position that can be thought of as the arrow keys typically found on a keyboard. This will be one of the following values: SwingConstants.WEST SwingConstants.EAST SwingConstants.NORTH SwingConstants.SOUTH - int
bias-ret - Used to return resulting Bias of next position - javax.swing.text.Position$Bias[]
returns: the location within the model that best represents the next
location visual position - int
throws: javax.swing.text.BadLocationException
Returns the next visual position to place the caret at from an existing position. The default implementation simply forwards the method to the root View. Subclasses may wish to further restrict the location based on additional criteria. text - JTextComponent containing text - `javax.swing.text.JTextComponent` pos - Position used in determining next position - `int` bias - Bias used in determining next position - `javax.swing.text.Position$Bias` direction - the direction from the current position that can be thought of as the arrow keys typically found on a keyboard. This will be one of the following values: SwingConstants.WEST SwingConstants.EAST SwingConstants.NORTH SwingConstants.SOUTH - `int` bias-ret - Used to return resulting Bias of next position - `javax.swing.text.Position$Bias[]` returns: the location within the model that best represents the next location visual position - `int` throws: javax.swing.text.BadLocationException
(move-dot this fb dot bias)
Invoked prior to the Caret moving the dot. The default implementation calls directly into the FilterBypass with the passed in arguments. Subclasses may wish to conditionally call super with a different location, or invoke the necessary methods on the FilterBypass.
fb - FilterBypass that can be used to mutate caret position - javax.swing.text.NavigationFilter$FilterBypass
dot - the position >= 0 - int
bias - Bias for new location - javax.swing.text.Position$Bias
Invoked prior to the Caret moving the dot. The default implementation calls directly into the FilterBypass with the passed in arguments. Subclasses may wish to conditionally call super with a different location, or invoke the necessary methods on the FilterBypass. fb - FilterBypass that can be used to mutate caret position - `javax.swing.text.NavigationFilter$FilterBypass` dot - the position >= 0 - `int` bias - Bias for new location - `javax.swing.text.Position$Bias`
(set-dot this fb dot bias)
Invoked prior to the Caret setting the dot. The default implementation calls directly into the FilterBypass with the passed in arguments. Subclasses may wish to conditionally call super with a different location, or invoke the necessary method on the FilterBypass
fb - FilterBypass that can be used to mutate caret position - javax.swing.text.NavigationFilter$FilterBypass
dot - the position >= 0 - int
bias - Bias to place the dot at - javax.swing.text.Position$Bias
Invoked prior to the Caret setting the dot. The default implementation calls directly into the FilterBypass with the passed in arguments. Subclasses may wish to conditionally call super with a different location, or invoke the necessary method on the FilterBypass fb - FilterBypass that can be used to mutate caret position - `javax.swing.text.NavigationFilter$FilterBypass` dot - the position >= 0 - `int` bias - Bias to place the dot at - `javax.swing.text.Position$Bias`
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