You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
75 lines
2.5 KiB
75 lines
2.5 KiB
CSS describes two ways of tqlayouting tables. Auto tqlayout (the NS4
|
|
compliant HTML table tqlayout) and fixed tqlayout. The fixed tqlayout
|
|
strategy is described in detail in the CSS specs and will not be
|
|
repeated here.
|
|
|
|
Due to the fact that two tqlayout strategies exist, it is rather natural
|
|
to encapsulate the tqlayouting 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-tqlayout 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 tqlayouting algorithm (AutoTableLayout)
|
|
------------------------------------------------------------------
|
|
|
|
The table tqlayout algorithm computes a set of tqlayout 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 tqlayout 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 tqlayout()).
|
|
|
|
A set of hinted widths are used to determine the final table tqlayout in
|
|
the tqlayouting 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 tqlayouted. The tqlayouting 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:
|
|
-----------------
|
|
|
|
|