Support filling images in cells

[wangsongyan]

PR Details

Support filling images in cells

Description

Add Fill option in excelize.GraphicOptions to allow user filling images in cells.

Related Issue

Motivation and Context

How Has This Been Tested

Types of changes

• Docs change / refactoring / dependency upgrade
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.30%. Comparing base (c349313) to head (4190a78).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1923      +/-   ##
==========================================
- Coverage   99.30%   99.30%   -0.01%     
==========================================
  Files          32       32              
  Lines       24989    24962      -27     
==========================================
- Hits        24815    24788      -27     
  Misses         93       93              
  Partials       81       81              

Flag	Coverage Δ
unittests	99.30% <100.00%> (-0.01%)	⬇️

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[xuri]

Thanks for your pull request. This library already supports adding images to auto-fits the cell size by the AutoFit field, but keeps the aspect ratio of the image. I have made the following changes based on your branch:

• The name "Fill" was the same as the Fill data type, renaming it to AutoFitIgnoreAspect will be more clear and meaningful
• Added documentation for how to use the AutoFitIgnoreAspect fields
• Simplify code for override width and height by AutoFitIgnoreAspect value
• Update the unit tests for it