Corrections to width calculations.

[alexgo91]

Corrections to width calculations: handled some missing cases + corrected some existing widths.

1. getCalculatedWidth: 'display:block' elements will lookup at parent's calculated width, instead of solely looking at 'width' attribute.
2. getCalculatedWidth: HtmlImage's width will be calculated according to image dimensions (it was defaulting to the 'else' part, always returning 0 via getContentWidth()).
3. getContentWidth: child with 'display:none' will have width 0.
4. getContentWidth: 'script' tags will have width 0 (previously it was calculated according to their text content).
5. getContentWidth: before proceeding to checking content's length, we'll check the 'style=width:X' attribute - if it exists then this is our width.
6. getContentWidth: HtmlImage's width will be calculated according to image dimensions (previously it was calculated by length of text content).
7. getContentWidth: HTMLElement's content width must be calculated with getContentWidth(). getCalculatedWidth() will not work correctly for inline-block calculations.
8. getContentWidth: Text elements should be trimmed when calculating content's width - this is how browsers handle text. Llimitation: there is currently no way to differentiate between   tags and actual space.
9. getContentWidth: spaces/indentation between tags are sometimes rendered as Text nodes, consisting of whitespace. Solution in bullet 8 will prevent these from adding length to width calculations (important!)
10. getLeft: should rely on parent's calculated length, not solely on parent's 'width' attribute (requires further testing).

[rbri]

Hi Alex,
many thanks for this contribution.

It will be great, if you can add some tests cases.

[alexgo91]

Hey rbri,

I have added several test cases, thank you 👍

[rbri]

I'm already working on this - will do this slightly different so no direct merge. Please be a bit patient, changes are on the way.

[rbri]

all your tests are added, have done some changes to pass most of them.

[alexgo91]

Alright thank you for the update rbri 👍