Highlight to text in PDF content
kyoshizaki opened this issue · comments
Abstract
- Display background-color for selected text in learning content.
- Similar function for web page (not for content in LePo) has already implemented with browser extension .
Sample highlight with browser extension
- Fix bug that highlights are not displayed on IE11
- Save and show a highlight correctly on Firefox
- Cause: A line feed code is inserted after each character with PDF file.
- Investigate cases where the Japanese text in the PDF file garbled.
- Case1: PDF export from PowerPoint > Page edit by Preview on macOS 10.12.6
Highlight is divided for each character in Japanese text
Condition
- File > Export: PowerPoint for Mac v15.41 on macOS Sierra
- Upload exported PDF file to LePo as a PageFile
- Highlight the PDF
Result
- English font: OK (except highlight is divided at space)
- Japanese font: NG for MS Gothic andMS Mincho
Current Status for text
- Checked PDFjs (v1.7.255)view file generated from slide applications (table below).
- Though all PDF files below have proper text (with space) both in English and Japanese, some html files with PDFjs process have trouble.
- Results are same for PDFjs versions v1.9.426 and v1.10.88
Table: From Slide to PDFjs Check text (blue: good, yellow: bad, red: worst)
Current Status for hyperlink
