FYI, I have created a new branch where I placed a new approach to side floats. The idea behind the approach is that if we can handle a change in IPD from one page to the next we can also do the same in the middle of a page (where a float causes the change in IPD). This also means that the implementation suffers, right now, from the same limitations that the handling of an IPD change across pages has.
So, in summary: Left and right floats are supported in the most simple cases, including in multi-column layouts. Below are listed the known limitations: -- the "clear" fo:float attribute is ignored; only the float attribute (left or right) is used -- overlapping of floats in the Y is not handled (even in the case there would not be overlap in the X direction) -- floats that extend beyond the body region are not properly handled and will overflow past the edge of the region -- floats next to a table or a list are not supported unless the start and end of the table or list happen in between the start and end of the float -- a list can extend past the end of a float but only in situations where the list item at the end of the (bottom of the) float does not need to be wrapped; but wrapping before or after the bottom edge of the float is supported Attached is an example and the output (a similar two column example is in the layout tests). Comments, suggestion and bugs are welcome. I would like to commit this to trunk in a few weeks but meanwhile I will investigate alternative approaches to some of the current limitations.
<?xml version="1.0" encoding="UTF-8"?> <fo:root xmlns:fo="http://www.w3.org/1999/XSL/Format";> <fo:layout-master-set> <fo:simple-page-master margin="50pt" master-name="page" page-height="800pt" page-width="600pt"> <fo:region-body background-color="yellow" /> </fo:simple-page-master> </fo:layout-master-set> <fo:page-sequence master-reference="page"> <fo:flow flow-name="xsl-region-body"> <fo:block> Elstree Reservoir[edit] The dam was built in 1795 by French prisoners of war.[34] English watercolour landscape painter John Hassell writes: "At the top of Stanmore Hill we enter on Bushy Heath, and at some distance on the right in the valley catch a view of the celebrated reservoir, the property of the Grand Junction Company, on Aidenham Common, at the foot of the village of Elstree. This noble sheet of water occupies a space of considerable extent on the verge of Aidenham Common, which thirty years ago was a barren waste; here the improvements in agriculture are indeed conspicuous, for at this place a poor, sandy, meagre, wretched soil has now by good husbandry been converted into rich pasturage. "The reservoir has all the appearance of a lake; and when the timber that surrounds it shall have arrived at maturity, it will be a most delightful spot. From this immense sheet of water, in event of drought or a deficiency of upland waters, the lower parts of the Grand Junction and the Paddington Canals can have an immediate supply. The feeder from this reservoir enters the main stream near Rickmansworth, above Batchworth Mills, and supplies the millers' below with 300 locks of water, to whose interest the Duke of Northumberland is a perpetual trustee."[35] In 1886, the Photographic Society of Great Britain featured an exhibition of photos of Elstree Reservoir by Edgar Clifton.[36] During World War I, then Major Keith Caldwell with No. 74 Squadron RAF, used Elstree Reservoir for target practice.[37] In 1918, one of the pilots accidentally killed a local resident when his machine gun misfired.[38] </fo:block> <fo:block> Elstree Reservoir[edit] The dam was built in 1795 by French prisoners of war.[34] English watercolour landscape painter John Hassell writes: "At the top of Stanmore Hill we enter on Bushy Heath, and at some distance on the right in the valley catch a view of the celebrated reservoir, the property of the Grand Junction Company, on Aidenham Common, at the foot of the village of Elstree. This noble sheet of water occupies a space of considerable extent on the verge of Aidenham Common, which thirty years ago was a barren waste; here the improvements in agriculture are indeed conspicuous, for at this place a poor, sandy, meagre, wretched soil has now by good husbandry been converted into rich pasturage. "The reservoir has all the appearance of a lake; and when the timber that surrounds it shall have arrived at maturity, it will be a most delightful spot. From this immense sheet of water, in event of drought or a deficiency of upland waters, the lower parts of the Grand Junction and the Paddington Canals can have an immediate supply. The feeder from this reservoir enters the main stream near Rickmansworth, above Batchworth Mills, and supplies the millers' below with 300 locks of water, to whose interest the Duke of Northumberland is a perpetual trustee."[35] In 1886, the Photographic Society of Great Britain featured an exhibition of photos of Elstree Reservoir by Edgar Clifton.[36] During World War I, then Major Keith Caldwell with No. 74 Squadron RAF, used Elstree Reservoir for target practice.[37] In 1918, one of the pilots accidentally killed a local resident when his machine gun misfired.[38] </fo:block> <fo:block> Elstree Reservoir[edit] The dam was built in 1795 by French prisoners of war.[34] English watercolour landscape painter John Hassell writes: "At the top of Stanmore Hill we enter on Bushy Heath, and at some distance on the right in the valley catch a view of the celebrated reservoir, the property of the Grand Junction Company, on Aidenham Common, at the foot of the village of Elstree. This noble sheet of water occupies a space of considerable extent on the verge of Aidenham Common, which thirty years ago was a barren waste; here the improvements in agriculture are indeed conspicuous, for at this place a poor, sandy, meagre, wretched soil has now by good husbandry been converted into rich pasturage. "The reservoir has all the appearance of a lake; and when the timber that surrounds it shall have arrived at maturity, it will be a most delightful spot. From this immense sheet of water, in event of drought or a deficiency of upland waters, the lower parts of the Grand Junction and the Paddington Canals can have an immediate supply. The feeder from this reservoir enters the main stream near Rickmansworth, above Batchworth Mills, and supplies the millers' below with 300 locks of water, to whose interest the Duke of Northumberland is a perpetual trustee."[35] In 1886, the Photographic Society of Great Britain featured an exhibition of photos of Elstree Reservoir by Edgar Clifton.[36] During World War I, then Major Keith Caldwell with No. 74 Squadron RAF, used Elstree Reservoir for target practice.[37] In 1918, one of the pilots accidentally killed a local resident when his machine gun misfired.[38] </fo:block> <fo:block> Put some content before the float but enough to make the float go to the third line of this block. Just enought content to place the float in the second line is not desirable. <fo:inline color="red">This is the last content before the float and the float is right now.</fo:inline> <fo:float float="start"> <fo:block border="1pt solid red" padding="10pt" color="blue" end-indent="0pt" start-indent="0pt"> <fo:block-container inline-progression-dimension="100pt"> <fo:block background-color="orange"> This is a normal block that is confined to the block container inside a side float. The background is orange. </fo:block> </fo:block-container> </fo:block> </fo:float> <fo:inline color="blue">This is the first content after the float.</fo:inline> This paragraph contains a side float and the content of the paragraph needs to be wrapped around the float... this is very complicated but the current implementation can handle the simpler cases. </fo:block> <fo:block> Elstree Reservoir[edit] The dam was built in 1795 by French prisoners of war.[34] English watercolour landscape painter John Hassell writes: "At the top of Stanmore Hill we enter on Bushy Heath, and at some distance on the right in the valley catch a view of the celebrated reservoir, the property of the Grand Junction Company, on Aidenham Common, at the foot of the village of Elstree. This noble sheet of water occupies a space of considerable extent on the verge of Aidenham Common, which thirty years ago was a barren waste; here the improvements in agriculture are indeed conspicuous, for at this place a poor, sandy, meagre, wretched soil has now by good husbandry been converted into rich pasturage. "The reservoir has all the appearance of a lake; and when the timber that surrounds it shall have arrived at maturity, it will be a most delightful spot. From this immense sheet of water, in event of drought or a deficiency of upland waters, the lower parts of the Grand Junction and the Paddington Canals can have an immediate supply. The feeder from this reservoir enters the main stream near Rickmansworth, above Batchworth Mills, and supplies the millers' below with 300 locks of water, to whose interest the Duke of Northumberland is a perpetual trustee."[35] In 1886, the Photographic Society of Great Britain featured an exhibition of photos of Elstree Reservoir by Edgar Clifton.[36] During World War I, then Major Keith Caldwell with No. 74 Squadron RAF, used Elstree Reservoir for target practice.[37] In 1918, one of the pilots accidentally killed a local resident when his machine gun misfired.[38] </fo:block> <fo:block> Put some content before the float but enough to make the float go to the third line of this block. Just enought content to place the float in the second line is not desirable. <fo:inline color="red">This is the last content before the float and the float is right now.</fo:inline> <fo:float float="end"> <fo:block border="1pt solid red" padding="10pt" color="blue" end-indent="0pt" start-indent="0pt"> <fo:block-container inline-progression-dimension="90pt"> <fo:block background-color="pink"> This is a normal block that is confined to the block container inside a side float. The background is pink. </fo:block> </fo:block-container> </fo:block> </fo:float> <fo:inline color="blue">This is the first content after the float.</fo:inline> This paragraph contains a side float and the content of the paragraph needs to be wrapped around the float... this is very complicated but the current implementation can handle the simpler cases. </fo:block> <fo:block> Elstree Reservoir[edit] The dam was built in 1795 by French prisoners of war.[34] English watercolour landscape painter John Hassell writes: "At the top of Stanmore Hill we enter on Bushy Heath, and at some distance on the right in the valley catch a view of the celebrated reservoir, the property of the Grand Junction Company, on Aidenham Common, at the foot of the village of Elstree. This noble sheet of water occupies a space of considerable extent on the verge of Aidenham Common, which thirty years ago was a barren waste; here the improvements in agriculture are indeed conspicuous, for at this place a poor, sandy, meagre, wretched soil has now by good husbandry been converted into rich pasturage. "The reservoir has all the appearance of a lake; and when the timber that surrounds it shall have arrived at maturity, it will be a most delightful spot. From this immense sheet of water, in event of drought or a deficiency of upland waters, the lower parts of the Grand Junction and the Paddington Canals can have an immediate supply. The feeder from this reservoir enters the main stream near Rickmansworth, above Batchworth Mills, and supplies the millers' below with 300 locks of water, to whose interest the Duke of Northumberland is a perpetual trustee."[35] In 1886, the Photographic Society of Great Britain featured an exhibition of photos of Elstree Reservoir by Edgar Clifton.[36] During World War I, then Major Keith Caldwell with No. 74 Squadron RAF, used Elstree Reservoir for target practice.[37] In 1918, one of the pilots accidentally killed a local resident when his machine gun misfired.[38] </fo:block> <fo:block> Put some content before the float but enough to make the float go to the third line of this block. Just enought content to place the float in the second line is not desirable. <fo:inline color="red">This is the last content before the float and the float is right now.</fo:inline> <fo:float float="start"> <fo:block border="1pt solid red" padding="10pt" color="blue" end-indent="0pt" start-indent="0pt"> <fo:block-container inline-progression-dimension="110pt"> <fo:block background-color="green"> This is a normal block that is confined to the block container inside a side float. The background is green. </fo:block> </fo:block-container> <fo:block>This line is not constrained by a width.</fo:block> </fo:block> </fo:float> <fo:inline color="blue">This is the first content after the float.</fo:inline> This paragraph contains a side float and the content of the paragraph needs to be wrapped around the float... this is very complicated but the current implementation can handle the simpler cases. </fo:block> <fo:block> Elstree Reservoir[edit] The dam was built in 1795 by French prisoners of war.[34] English watercolour landscape painter John Hassell writes: "At the top of Stanmore Hill we enter on Bushy Heath, and at some distance on the right in the valley catch a view of the celebrated reservoir, the property of the Grand Junction Company, on Aidenham Common, at the foot of the village of Elstree. This noble sheet of water occupies a space of considerable extent on the verge of Aidenham Common, which thirty years ago was a barren waste; here the improvements in agriculture are indeed conspicuous, for at this place a poor, sandy, meagre, wretched soil has now by good husbandry been converted into rich pasturage. "The reservoir has all the appearance of a lake; and when the timber that surrounds it shall have arrived at maturity, it will be a most delightful spot. From this immense sheet of water, in event of drought or a deficiency of upland waters, the lower parts of the Grand Junction and the Paddington Canals can have an immediate supply. The feeder from this reservoir enters the main stream near Rickmansworth, above Batchworth Mills, and supplies the millers' below with 300 locks of water, to whose interest the Duke of Northumberland is a perpetual trustee."[35] In 1886, the Photographic Society of Great Britain featured an exhibition of photos of Elstree Reservoir by Edgar Clifton.[36] During World War I, then Major Keith Caldwell with No. 74 Squadron RAF, used Elstree Reservoir for target practice.[37] In 1918, one of the pilots accidentally killed a local resident when his machine gun misfired.[38] </fo:block> <fo:block> Elstree Reservoir[edit] The dam was built in 1795 by French prisoners of war.[34] English watercolour landscape painter John Hassell writes: "At the top of Stanmore Hill we enter on Bushy Heath, and at some distance on the right in the valley catch a view of the celebrated reservoir, the property of the Grand Junction Company, on Aidenham Common, at the foot of the village of Elstree. This noble sheet of water occupies a space of considerable extent on the verge of Aidenham Common, which thirty years ago was a barren waste; here the improvements in agriculture are indeed conspicuous, for at this place a poor, sandy, meagre, wretched soil has now by good husbandry been converted into rich pasturage. "The reservoir has all the appearance of a lake; and when the timber that surrounds it shall have arrived at maturity, it will be a most delightful spot. From this immense sheet of water, in event of drought or a deficiency of upland waters, the lower parts of the Grand Junction and the Paddington Canals can have an immediate supply. The feeder from this reservoir enters the main stream near Rickmansworth, above Batchworth Mills, and supplies the millers' below with 300 locks of water, to whose interest the Duke of Northumberland is a perpetual trustee."[35] In 1886, the Photographic Society of Great Britain featured an exhibition of photos of Elstree Reservoir by Edgar Clifton.[36] During World War I, then Major Keith Caldwell with No. 74 Squadron RAF, used Elstree Reservoir for target practice.[37] In 1918, one of the pilots accidentally killed a local resident when his machine gun misfired.[38] </fo:block> <fo:block> Put some content before the float but enough to make the float go to the third line of this block. Just enought content to place the float in the second line is not desirable. <fo:inline color="red">This is the last content before the float and the float is right now.</fo:inline> <fo:float float="start"> <fo:block border="1pt solid red" padding="10pt" color="blue" end-indent="0pt" start-indent="0pt"> <fo:block background-color="red"> The background is red. </fo:block> </fo:block> </fo:float> <fo:inline color="blue">This is the first content after the float.</fo:inline> This paragraph contains a side float and the content of the paragraph needs to be wrapped around the float... this is very complicated but the current implementation can handle the simpler cases. </fo:block> <fo:block> Elstree Reservoir[edit] The dam was built in 1795 by French prisoners of war.[34] English watercolour landscape painter John Hassell writes: "At the top of Stanmore Hill we enter on Bushy Heath, and at some distance on the right in the valley catch a view of the celebrated reservoir, the property of the Grand Junction Company, on Aidenham Common, at the foot of the village of Elstree. This noble sheet of water occupies a space of considerable extent on the verge of Aidenham Common, which thirty years ago was a barren waste; here the improvements in agriculture are indeed conspicuous, for at this place a poor, sandy, meagre, wretched soil has now by good husbandry been converted into rich pasturage. "The reservoir has all the appearance of a lake; and when the timber that surrounds it shall have arrived at maturity, it will be a most delightful spot. From this immense sheet of water, in event of drought or a deficiency of upland waters, the lower parts of the Grand Junction and the Paddington Canals can have an immediate supply. The feeder from this reservoir enters the main stream near Rickmansworth, above Batchworth Mills, and supplies the millers' below with 300 locks of water, to whose interest the Duke of Northumberland is a perpetual trustee."[35] In 1886, the Photographic Society of Great Britain featured an exhibition of photos of Elstree Reservoir by Edgar Clifton.[36] During World War I, then Major Keith Caldwell with No. 74 Squadron RAF, used Elstree Reservoir for target practice.[37] In 1918, one of the pilots accidentally killed a local resident when his machine gun misfired.[38] </fo:block> </fo:flow> </fo:page-sequence> </fo:root>
basic-floats.pdf
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