[[!meta title="Documentation/Frames"]]
[[!meta author="James Bursa"]]
[[!meta date="2010-03-01T02:56:32Z"]]
[[!toc]] Frames cut across many
parts of the browser.
Representation in content
-------------------------
During box-tree construction (box\_construct.c), frameset, frame, and
iframe elements are converted into structures in the 'struct content'
for the HTML document.
Framesets and frames form a tree of 'struct content\_html\_frames' at
content-\>data.html.frameset. For example, the source
results in the tree
0x6099f2f4 (2 1) w0px h0px (margin w0 h0) (scrolling no)
(0 0): 0x608b730c (1 2) w100% h50% (margin w0 h0) (scrolling no)
(0 0): 0x608dae74 (0 0) w40px h100% (margin w0 h0) 'A' (scrolling auto) border 0
(0 1): 0x608daeb0 (0 0) w200px h100% (margin w0 h0) 'B' (scrolling auto) border 0
(1 0): 0x608b7348 (1 2) w100% h50% (margin w0 h0) (scrolling no)
(0 0): 0x608d9b4c (0 0) w3* h100% (margin w0 h0) 'C' (scrolling auto) border 0
(0 1): 0x608d9b88 (0 0) w1* h100% (margin w0 h0) 'D' (scrolling auto) border 0
(output from html\_dump\_frameset()).
Creation of browser windows
---------------------------
When a document containing frames is displayed in a browser window,
child windows are created for frames and iframes. This occurs when a
browser window receives a CONTENT\_MSG\_READY in
browser\_window\_callback(), which calls
browser\_window\_create\_frameset().
browser\_window\_create\_frameset() constructs a tree of 'struct
browser\_window' corresponding to the tree of 'struct
content\_html\_frames'. For each new browser\_window, it calls
gui\_create\_browser\_window() to create and open the actual
platform-specific window (represented by a 'struct gui\_window').
When this is completed it calls browser\_window\_recalculate\_frameset()
which calculates the positions of each frame in pixels and calls
gui\_window\_position\_frame() to position each one.
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