Text Annotation Tool

[nikhiilll]

Text Annotation

Added the text annotation functionality. To implement the text annotation, we are using a ForeignObject inside the annotation SVG. We use a Textarea input to let the user type and get the text. Once the user starts drawing another annotation, we transform the input to a p tag containing the same text and styling that the user had.

Changes

• annotationContainer.css: Added styling for the textbox functionality and the font size input
• annotation-tool.js: Added the text annotation tool option, font size input and handling for annotation-specific functions
• annotation-group.js: Changes to handle the creation and import of text annotation
• annotation-svg.js: Changes to handle font size change and parsing of text/foreign object nodes
• base.js: Small changes to handle the export for text annotation
• text.js: Added this file which contains all the text annotation functionality
• viewer.js: Implemented functions to implement mouse handlers to handle the positioning of text annotation
• mview.html: Added the import for the text annotation file

[RFSH]

In Safari, we couldn't figure out how to show the handler for resizing the textbox, so for now, that feature is not used in Safari.

Everything else seems to be working as expected. I will merge this PR and get back to the Safari issue later.