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37 lines
1.8 KiB
Plaintext
37 lines
1.8 KiB
Plaintext
This files describes API changes in /dataformat/ download system,
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information provided here is intended especially for developers.
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=== 3.11.1 ===
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* Optional $callback for the following \core\dataformat methods now receive a second argument to define
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whether the current format writer supports HTML:
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- download_data()
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- write_data()
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- write_data_to_filearea()
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=== 3.9 ===
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* The following methods have been added to the base dataformat class to allow instances to export to a local
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file. They can be overridden in extending classes to define how files should be created:
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- start_output_to_file()
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- close_output_to_file()
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* Calls to the following dataformat plugin methods have been removed:
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- write_header()
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- write_footer()
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* The following methods have been added to the base class to allow instances to define support for exporting
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HTML content, with additional support for defining how images should be embedded:
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- supports_html()
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- export_html_image_source()
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* Dataformat writers should also call the following method to ensure data is properly formatted before being
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written, which takes into account prior methods defining support for HTML:
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- format_record()
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=== 3.4 ===
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* In order to allow multiple sheets in an exported file the functions write_header() and write_footer() have
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been removed from core dataformat plugins and have been replaced.
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- write_header() has been replaced with the two functions start_output() and start_sheet().
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- write_footer() has been replaced with the two functions close_output() and close_sheet().
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For backwards compatibility write_header() and write_footer() will continue to work but if used will
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trigger the function error_log().
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=== 3.1 ===
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* Added new plugin system with low memory support for csv, ods, xls and json
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