Also in photo editing UI - for text overlays.
Previous implementation used NSAttributedString's ability to set text background
color. Appearance wasn't impressive though as there wasn't a way to add padding
around the text or round corners for the background.
New approach is to add a rectangle background underneath the text - which
story viewer was already doing.
* Hide camera controls when switching to TEXT.
* Streamline camera capture session state tracking.
Stop camera when switching to TEXT.
* Basic text story composer.
All UI works, but needs fine-tuning and tapping on Next (->) doesn't do anything.
* Run auto-genstrings.
* Adjust text size and alignment as user enters text.
1..49 characters: 34 pt, center-aligned.
50..199 characters: 24 pt, center-aligned.
200.. characters: 18 pt, natural alignment.
* Change default text color in text story composer to white.
* Added support for changing background of text story composer.
Selection is allowed from palette of 5 gradients and 11 solid colors.
* Improve vertical alignment of text in text story composer.
Text (and possible link preview panel in the future) should be vertically
centered in the area above either bottom controls or onscreen keyboard.
* Add UI for attaching a link preview to a text story.
* Add support for posting text stories.
* Lint.
When calculating layout size of the photo overlay text max width is capped at
how wide UITextView was during editing, with the purpose of preserving wrapping
between editor (UITextView) and overlay (CATextLayer).
Previously though, UITextView was set to auto-shrink its width to content size,
which caused max width to not be not enough after changing the font to a bolder variant.
The fix is to pin UITextView's width to view margins so that all available width
is always used when measuring text overlay height.
• rename VAlignTextView to MediaTextView.
• rename ImageEditorPaletteView to ColorPickerBarView.
• move text style declarations from ImageEditorTextItem to MediaTextView because
those would no longer be specific to image editor.
• extract TextToolbar from ImageEditorViewController to a standalone public class
that is supposed to work in conjunction with MediaTextView.
