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authorDarrell Anderson <humanreadable@yahoo.com>2013-03-02 15:57:34 -0600
committerDarrell Anderson <humanreadable@yahoo.com>2013-03-02 15:57:34 -0600
commit7c0b0c9dc9fcbe9c198925bdc7ee18ac6be49f4f (patch)
treec76702a7f6310fbe9d437e347535422e836e94e9 /khtml/rendering/table_layout.txt
parenta2a38be7600e2a2c2b49c66902d912ca036a2c0f (diff)
parent27bbee9a5f9dcda53d8eb23863ee670ad1360e41 (diff)
downloadtdelibs-7c0b0c9dc9fcbe9c198925bdc7ee18ac6be49f4f.tar.gz
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Merge branch 'master' of http://scm.trinitydesktop.org/scm/git/tdelibs
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-CSS describes two ways of layouting tables. Auto layout (the NS4
-compliant HTML table layout) and fixed layout. The fixed layout
-strategy is described in detail in the CSS specs and will not be
-repeated here.
-
-Due to the fact that two layout strategies exist, it is rather natural
-to encapsulate the layouting process in a TableLayout class. Two types
-(FixedTableLayout and AutoTableLayout) exist. AutoTableLayout is the
-default and also need a quirks flags for NS compatibility
-mode. FixedTableLayout will be used if a style rule sets the
-table-layout property to fixed.
-
-The grid of table cells is stored in each table section, as spans
-can't pass section borders. Changing the number of cols in the grid
-has to be done by the table to keep all grids (for all sections) in
-sync. The grid only stores effective columns. The table below would
-only result in one column being allocated in the grid:
-
-<table><tr><td colspan=1000>foo</td></tr></table>
-
-Once a colspan get's used, the column is split into its subparts. To
-do this, the table has to store the colspans of effective columns in a
-structure.
-
-
-
-
-NS & Mozilla compliant table layouting algorithm (AutoTableLayout)
-------------------------------------------------------------------
-
-The table layout algorithm computes a set of layout hints from the
-informations in the table cells, <col> elements and style
-sheets. Hints from different sources are treated a bit differently in
-the collection stage.
-
-In addition certain operations are only done in quirks (NS4 compat)
-mode.
-
-Resizing the table doesn't require you to build up this information
-again. All that is needed is a list of layout hints for each column.
-
-The algorithm below describes to the best of our knowledge the way
-table alyouting is handled in a NS compatible way.
-
-There are two stages, the collection stage (assocaited with
-calcMinMaxWidth() in khtml) and the stage assigning width to cells
-(associated with layout()).
-
-A set of hinted widths are used to determine the final table layout in
-the layouting stage.
-
-enum hintType {
- MinWidth,
- DesiredWidth,
- FixedWidth,
- MinWidthAdjusted,
- DesiredWidthAdjusted,
- FixedWidthAdjusted,
- PercentWidth,
- PercentWidthAdjusted,
- ProportionalWidth
-};
-
-One width (in pixels) for each hintType describes how the column
-wishes to be layouted. The layouting stage operates only on an array
-of hints for each column.
-
-An additional totalCellSpacing variable is used to know about the
-remaining width to distribute.
-
-Collection stage:
------------------
-
-