- Focused: returns whether editor is focused
- CaretPos: returns the text line & column numbers of the caret.
- CaretCoords: returns the x & y pixel coordinates of the caret.
- NumLines: returns the number of text lines in the editor
Signed-off-by: Larry Clapp <larry@theclapp.org>
Editor's event processing assumes the cached layout is valid, but
it might not be if the program changed the Editor text between calling
Layout and Events.
Fixes#85 (I think)
Signed-off-by: Elias Naur <mail@eliasnaur.com>
Now that text layout and shaping operate on concrete sizes and not
units, Editor no longer needs to detect scaling changes. Remove it.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
First, replace LayoutOptions with an explicit maximum width parameter. The
single-field option struct doesn't carry its weight, and I don't think we'll
see more global layout options in the future. Rather, I expect options to cover
spans of text or be part of a Font.
Second, replace the unit.Converter with an scaled text size. It's simpler and
allow the Editor and similar widgets to easily detect whether their cached
layouts are stale. Package text no longer depends on package unit, which is
now dealt with at the widget-level only.
Finally, remove the Size field from Font. It was a design mistake: a Font is
assumed to cover all sizes, as evidenced by the FontRegistry disregarding
Size when looking up fonts.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
In preparation for using Shaper with an io.Reader, rework the API to not refer
to strings. In particular, introduce Glyph for holding the rune in addition to
the advance. For fast traversing of the underlying text, add Len to Line with
the UTF8 length.
Layout is a useless wrapper around []Line; remove it while we're
here.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
Editor.Delete
Editor.Move
Editor.Insert
Move the Editor.command method up above all the functions it calls.
Signed-off-by: Larry Clapp <larry@theclapp.org>
MacroOp is about to lose the ability to run a different operation list
than the one it was recorded on. Text shape caches rely on that property,
and must use the new CallOp operation added for purpose.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
While here, unexport the Queue and Config fields. The NewContext
cosntructor is shorter, and there is no reason to expose the fields
to accidental mutation.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
When you press enter to "submit" an editor widget, don't also append the
newline to the editor text. Enter should be "submit" or "add newline"
but not both.
Also add parens to the Enter check: x && y || z => x && (y || z).
Signed-off-by: Larry Clapp <larry@theclapp.org>
Determining the enabled state of a widget from whether its Clicked method has
been called only works for button-like widgets. For example, it's not clear a
Clicked method is appropriate for a CheckBox.
Remove the feature for now, and let's find a better design in the future.
As a nice side effect, we can now process events in Layout methods, so that
buttons react to user input even when Clicked is not called.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
Elias Naur