Moved dev docs to devdoc.

9 files changed, 0 insertions, 1264 deletions

diff --git a/doc/dw-fixed-positions.doc b/doc/dw-fixed-positions.doc
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--- a/doc/dw-fixed-positions.doc
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@@ -1,63 +0,0 @@
-/** \page dw-fixed-positions Fixed positions
-
-In some cases, widgets or widget content must be positioned relative
-to the viewport. As in the CSS specification, these positions will be
-called "fixed positions". This must not be confused with "fixedly
-positioned elements" (see \ref dw-out-of-flow), which are a special
-case of fixed positions.
-
-
-Applications
-============
-
-As defined by CSS
------------------
-
-- "position: fixed"; see  \ref dw-out-of-flow.
-- "background-attachment: fixed"; see  \ref dw-images-and-backgrounds.
-
-Idea for tables
----------------
-
-Often, tables have a header, which contains informations necessary to
-interpret the columns in the table body. For this, HTML defines the elements
-<thead> and <tbody>
-<sup><a href="#note-table-footer" id="ref-table-footer">[1]</a></sup>.
-
-For large tables, the problem occurs that the table header gets out of
-the reader's view. In paged media, where a large table covers multiple
-pages, this is often solved by *repeating* the table header on each
-page occupied by the table. When using a viewport, a table larger than
-the vieport could be displayed like this:
-
-1. If the top of the table is within the viewport, show the table
-   header at the usual position.
-2. As soon as top of the table gets above the top border of the
-   viewport, keep the table header at the viewport top, so that it is
-   still visible (this means, it moves down, relative to the
-   *canvas*). This way, the header is still visible, so our objective
-   is achieved.
-3. When scrolling further down, at some point the table body gets out
-   of the viewport again, and so should the table header.
-
-(Some images would be nice.)
-
-These ideas should be considered when developing a design for fixed
-positions.
-
-
-Design sketch
-==============
-
-[...]
-
-
-----------------------------------------------------------------------
-
-<sup><a href="#ref-table-footer" id="note-table-footer">[1]</a></sup>
-... and also &lt;tfoot&gt;, which is not discussed here, for reasons
-of simplicity. However, it is obvious that &lt;tfoot&gt; should be
-dealt with in an analogue way as &lt;thead&gt;.
-
-
-*/
\ No newline at end of file
diff --git a/doc/dw-interrupted-drawing-1.png b/doc/dw-interrupted-drawing-1.png
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diff --git a/doc/dw-interrupted-drawing-2.png b/doc/dw-interrupted-drawing-2.png
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diff --git a/doc/dw-interrupted-drawing.doc b/doc/dw-interrupted-drawing.doc
deleted file mode 100644
index c7037666..00000000
--- a/doc/dw-interrupted-drawing.doc
+++ /dev/null
@@ -1,121 +0,0 @@
-/** \page dw-interrupted-drawing Interrupted drawing
-
-Describing the problem
-======================
-
-Without interrupting drawing (which is described below), a widget can
-define the order in which its parts (background, non-widget content,
-child widgets, etc.) are drawn, but it must be drawn as a whole. There
-are situations when this is not possible.
-
-Consider the following simple HTML document:
-
-    <head>
-      <style>
-	#sc-1 { position: relative; z-index: 1; background: #ffe0e0; }
-	#fl-1 { float: right; background: #b0ffb0; }
-	#sc-2 { position: relative; z-index: 1; background: #f0f0ff; }
-      </style>
-    </head>
-    <body>
-      <div id="sc-1">
-	<div id="fl-1">
-	  Float, line 1/3<br/>
-	  Float, line 2/3<br/>
-	  Float, line 3/3
-	</div>
-	Stacking Context 1 
-	<div id="sc-2">Stacking Context 2</div>
-      </div>
-    </body>
-
-The rendering will look like this:
-
-\image html dw-interrupted-drawing-1.png
-
-Note the missing "Float, line 2/3" of element #fl-1, which is covered
-by element #sc-2.
-
-As described in \ref dw-out-of-flow, it has to be distinguished
-between the *container* hierarchy (equivalent to the hierarchy of
-dw::core::Widget.) and the the *generator* hierarchy. In the following
-diagram, the former is represented by solid lines, the latter by
-dotted lines:
-
-\dot
-digraph G {
-   node [shape=rect, fontname=Helvetica, fontsize=10];
-   edge [arrowhead="vee"];
-
-   "#sc-1" [fillcolor="#ffe0e0", style="filled"];
-   "#fl-1" [fillcolor="#b0ffb0", style="filled"];
-   "#sc-2" [fillcolor="#f0f0ff", style="filled"];
-
-   "body" -> "#sc-1";
-   "body" -> "#fl-1";
-   { rank=same; "#sc-1" -> "#fl-1" [style=dotted]; }
-   "#sc-1" -> "#sc-2";
-}
-\enddot
-
-
-The drawing order of the four elements (represented by widgets) is:
-
-- body,
-- #sc-1,
-- #fl-1,
-- #sc-2.
-
-Since 
-
-1. #sc-2 is a child of #sc-1, but
-2. #fl-1 is a child of the body, and
-3. a widget can only draw its descendants (not neccessary children,
-   but drawing siblings is not allowed),
-
-#sc-1 cannot be drawn as a whole; instead drawing is **interrupted**
-by #fl-1. This means:
-
-1. the background and text of #sc-1 is drawn;
-2. drawing of #sc-1 is **interrupted** by #fl-1 (see below for details),
-3. drawing of #sc-1 is **continued**, by drawing #sc-2.
-
-The exact control flow is described in this sequence diagram:
-
-\image html dw-interrupted-drawing-2.png
-
-
-When is drawing interrupted?
-============================
-
-A widget out of flow is regarded as part of the stacking context (see
-\ref dw-stacking-context) of its *generator* (in the example above:
-#fl-1 is part of the stacking context stablished by #sc-1, not the one
-established by body). For this reason, a widget out of flow must, in
-some cases, drawn while the *gerator* is drawn, as an
-interruption. The exact rule:
-
-A widget out of flow must be drawn as an interruption (while the
-*generator* is drawn) if the stacking context of the generator (to
-which this widget belongs) is in front of the stacking context of the
-container (the parent widget).
-
-See dw::oof::OOFAwareWidget::doesWidgetOOFInterruptDrawing.
-
-
-How does interruption of drawing work?
-======================================
-
-When a widget detects that an other widget should be drawn as
-interruption (see above), it calls dw::core::Widget::drawInterruption,
-which
-
-1. draws the widget within another "context" (area and reference
-   widget); for this the original drawing area
-   (dw::core::DrawingContext::getToplevelArea) is used.
-2. Using dw::core::DrawingContext::addWidgetDrawnAsInterruption, and
-   checking later with
-   dw::core::DrawingContext::hasWidgetBeenDrawnAsInterruption prevents
-   these widgets from being drawn twice.
-
-*/
diff --git a/doc/dw-miscellaneous.doc b/doc/dw-miscellaneous.doc
deleted file mode 100644
index d6b3cae3..00000000
--- a/doc/dw-miscellaneous.doc
+++ /dev/null
@@ -1,187 +0,0 @@
-/** \page dw-miscellaneous Miscellaneous Notes on Dw
-
-This is a barely sorted list of issues which I consider noteworthy,
-but have yet to be moved to other parts of the documentation (which is
-partly to be created).
-
-General
-=======
-
-Widget allocation outside of parent allocation
-----------------------------------------------
-A widget allocation outside of the allocation of the parent is
-allowed, but the part outside is not visible.
-
-Which widgets may be drawn?
--------------------
-
-All drawing starts with the toplevel widget
-(cf. dw::core::Widget::queueDrawArea, dw::core::Layout::queueDraw, and
-dw::core::Layout::expose), and a widget has to draw its children, in a
-way consistent with their stacking order.
-
-There are two exceptions:
-
-1. Direct descendants, which are not children, may be drawn, if the
-   parent can distinguish them and so omit drawing them a second
-   time. See dw::core::StackingContextMgr and \ref dw-stacking-context.
-   Parents should not draw children in flow for which
-   dw::core::StackingContextMgr::handledByStackingContextMgr returns
-   true.
-2. Interrupted drawing: via dw::core::Widget::drawInterruption; see
-   \ref dw-interrupted-drawing.
-
-Similar rules apply to handling mouse events
-(dw::core::Widget::getWidgetAtPoint).
-
-Interrupted drawing
--------------------
-→ \ref dw-interrupted-drawing.
-
-Similar rules apply to handling mouse events
-(dw::core::Widget::getWidgetAtPoint).
-
-
-Floats
-======
-
-Handling collisions
--------------------
-The CSS specification allows two strategies to deal with colliding
-floats: placing the second float beside or below the first one. Many
-other browsers implement the first approach, while dillo implements
-the second one, which may cause problems when the author assumes the
-first. Example: the "tabs" at the top of every page at Wikipedia
-("Article", "Talk", ...).
-
-Float containers in flow
-------------------------
-Consider the following HTML snippet:
-
-    <body>
-      <img src="....jpg" style="float:right">
-      <p style="overflow:hidden">Text</p>
-    </body>
-
-Interestingly, dillo shows "Text" always *below* the image, even if
-there is enough space left of it. An investigation shows that the
-paragraph (&lt;p&gt;) is regarded as own floats container (because of
-*overflow:hidden*), so the floats container above (&lt;body&gt;)
-regards this block as widget which must be fit between the floats
-(dw::Textblock::mustBorderBeRegarded &gt;
-dw::Textblock::getWidgetRegardingBorderForLine). However, since a
-textblock in flow always covers (at least) the whole available width,
-which is defined *without* considering floats, the space left of the
-float will always be to narrow, so that the paragraph is moved below
-the float, by inserting an empty line before.
-
-When searching for a solution, several difficulties show up:
-
-1. The available width, which is used for the width of the textblock,
-   is defined independent of floats. Aside from problems when changing
-   this definition, a dependance on floats would be difficult to
-   implement, since *sizeRequest* is independent of a position. (See
-   also \ref dw-out-of-flow.)
-2. I must admit that I do not rembember the exact rationale and the
-   test case behind adding the exception in
-   dw::Textblock::getWidgetRegardingBorderForLine (see above), but
-   simply removing this exception will result in a possible
-   overlapping of floats from both containers, since no collisions are
-   tested for.
-3. On the other hand, mixing the float containers (interaction of two
-   or more instances of dw::oof::OOFFloatsMgr), e.&nbsp;g. for
-   collision tests, would become too complex and possibly result in
-   performance problems.
-
-Instead, this approach is focussed:
-
-- Goal: the paragraph is narrowed so it fits, *as a whole*, between
-  the floats.
-- The approach is to remove the exception in
-  dw::Textblock::getWidgetRegardingBorderForLine. A textblock, which
-  is a float container in flow (as this paragraph), is returned by
-  this method and so dw::Textblock::mustBorderBeRegarded returns
-  *true*. This will put this paragraph again at the correct position.
-- To avoid overlappings, the linebreaking width of this paragraph
-  (which is also used for positioning of floats) is the available
-  width, minus the maximal float width on either side. (This is an
-  approach similar to the one dw::Ruler will use soon). Most likely,
-  some new methods will have to be added to calculate this.
-- For paragraphs like this, dw::Textblock::borderChanged must rewrap
-  all lines; *y* is irrelevant in this case.
-- Since the textblock will tend to become taller when getting
-  narrower, and so possibly cover more (wider) floats, and so become
-  narrower again etc., there may be multible solutions for calculating
-  the size. Generally, a smaller height (and so larger width) is
-  preferred.
-- There remains a problem: what if a word is too large? Should a
-  textblock of this kind then reard the floats in detail, to insert
-  empty lines when needed?
-
-**Real-world cases:** *Overflow:hidden* is set for headings in
-Wikipedia, and so this case occurs when there is a float (thumb image)
-before a heading. See e.&nbsp;g.
-<a href="http://de.wikipedia.org/wiki/Emmerich_am_Rhein#Ans.C3.A4ssige_Unternehmen">this page</a>
-and scroll a bit up; the company logos should be right of this section.
-
-**Priority:** Since this is not a regression, compared to not
-supporting floats at all, a fix is not urgent for a new release.
-
-Positioned elements
-===================
-
-General
--------
-(See also *relative positions* below.)
-
-What about negative positions?
-
-dw::oof::OutOfFlowMgr::tellPosition1 and
-dw::oof::OutOfFlowMgr::tellPosition2 could be combined again, and
-called in the respective circumstance, depending on
-dw::oof::OutOfFlowMgr::mayAffectBordersAtAll.
-
-Relative positions
-------------------
-**General Overview:** At the original position, a space as large as
-the positioned element is left. This is implemented by assigning a
-size to the widget *reference*. For this there are two new methods:
-dw::oof::OutOfFlowMgr::calcWidgetRefSize and
-dw::oof::OOFAwareWidget::widgetRefSizeChanged.
-
-**Bug:** Since the size of a relatively positioned element should be
-calculated as if it was in flow, the available width should be
-delegated to the *generator*; however, since
-dw::oof::OOFPosRelMgr::dealingWithSizeOfChild returns *false* in all
-cases, it is delegated to the *container*. **Idea for fix:**
-dw::oof::OOFPosRelMgr::dealingWithSizeOfChild should return *false* if
-and only if the generator of the child is the container (to prevent an
-endless recursion). In other cases,
-dw::oof::OOFPosRelMgr::getAvailWidthOfChild and
-dw::oof::OOFPosRelMgr::getAvailHeightOfChild should directly call the
-respective methods of the *generator*, which must be made public then.
-
-**Performance:** In many cases, the first call of
-dw::oof::OOFPosRelMgr::sizeAllocateEnd will queue again the resize
-idle, since some elements are not considered in
-dw::oof::OOFPosRelMgr::getSize. One case could be removed: if a
-positioned element has *left* = *top* = 0, and its total size (the
-requisition) is equal to the space left at the original position, the
-size of the widget *reference*
-(dw::oof::OOFAwareWidget::getRequisitionWithoutOOF, see
-dw::oof::OOFPosRelMgr::calcWidgetRefSize).
-
-**Documentation:** Describe why the latter is not covered by
-dw::oof::OOFPositionedMgr::doChildrenExceedContainer. (Is this really
-the case?)
-
-**Open:** Stacking order? Furthermore: a relatively positioned element
-does not always constitute a containing block (see CSS specification).
-
-Fixed positions
----------------
-Currently, fixedly positioned elements are positioned relative to the
-canvas, not to the viewport. For a complete implementation, see \ref
-dw-fixed-positions.
-
-*/
diff --git a/doc/dw-size-request-pos-01.png b/doc/dw-size-request-pos-01.png
deleted file mode 100644
index ba32e243..00000000
--- a/doc/dw-size-request-pos-01.png
+++ /dev/null
diff --git a/doc/dw-size-request-pos.doc b/doc/dw-size-request-pos.doc
deleted file mode 100644
index 08af0eec..00000000
--- a/doc/dw-size-request-pos.doc
+++ /dev/null
@@ -1,73 +0,0 @@
-/** \page dw-size-request-pos Size requisitions depending on positions
-
-<div style="border: 2px solid #ffff00; margin: 1em 0;
-  padding: 0.5em 1em; background-color: #ffffe0">The complex "widget
-  sizes" is currently divided into three documents: \ref
-  dw-widget-sizes, \ref dw-grows, and **Size requisitions depending on
-  positions** (this document). </div>
-
-Motivation
-==========
-
-As described in \ref dw-out-of-flow (*The sizeRequest/sizeAllocate
-problem*), the principle that the size of a widget depends only on the
-sizes of its children causes some problems with floats; the current
-solution is a frequent correction by calling
-dw::core::Widget::queueResize. In this document, an alternative
-approach is presented.
-
-
-General Idea
-============
-
-A widget size may depend on the position relative to an anchestor
-widget. If a widget wants to get the size of a child widget, it should
-
-1. call the new method dw::core::Widget::sizeRequestReference,
-   which returns NULL, when the child's size does not depend on the
-   position, or a widget relative to which the child's position must
-   be calculated;
-2. call dw::core::Widget::sizeRequest with the position relative to
-   this widget.
-
-The position passed to dw::core::Widget::sizeRequest must be the
-position at which this child will be allocated.
-
-There are situations where the parent widget is unable to determine
-this position before the size is known. An example: a textblock widget
-cannot determine the position of an inline widget (like an image, or
-an inline block) before the line is finished; on the other hand,
-finishing the line depends on knowing the sizes of the inline widgets.
-
-This may result in a conflict, when the size of an inline widgets
-depends on the position. Fortunately, this is not the case in dillo:
-the only widget whose size depends on the position is dw::Textblock
-(the size will depend on the position within its floats container); but
-an inline blocks constitute its own floats container, so that there is
-no dependance on a position within another widget.
-
-Generally, this case should be handled by providing a fallback
-strategy. (TODO: How does this look like? The widget is forced to
-calculate its size independant of the position?)
-
-Resizing
---------
-Currently, the size of a widget has to be recalculated, when
-
-1. it has called dw::core::Widget::queueResize, or
-2. the size of a child widget has to be recalculated.
-
-Since for this new approach, the size does not only depend on the size
-of the children, the second condition must be modified. However,
-regarding changes of the position is not sufficient. Consider this
-example, where a float size changes as soon as the image is loaded:
-
-\image html dw-size-request-pos-01.png
-
-The second paragraph ("A longer paragraph" ...) stays at the same
-position, both absolute and relative to the float container, but has
-to be rewrapped because of the float.
-
-(TODO: A detailed design is yet to de developed.)
-
-*/
\ No newline at end of file
diff --git a/doc/dw-stacking-context.doc b/doc/dw-stacking-context.doc
deleted file mode 100644
index 6138ca5d..00000000
--- a/doc/dw-stacking-context.doc
+++ /dev/null
@@ -1,114 +0,0 @@
-/** \page dw-stacking-context Handling stacking contexts
-
-Stacking Context and dw::core::StackingContextMgr
-=================================================
-
-For the definition of stacking contexts, see CSS 2.1 specification,
-
-- <a href="http://www.w3.org/TR/CSS2/visuren.html#z-index">section
-     9.9.1: Specifying the stack level: the 'z-index' property</a> and
-- <a href="http://www.w3.org/TR/CSS2/zindex.html">appendix E</a>.
-
-A widget establishes a stacking context when it is positioned and its
-style value of *z-index* is different from *auto* (see
-dw::core::StackingContextMgr::isEstablishingStackingContext). In this
-case, it is assigned an instance of dw::core::StackingContextMgr,
-which has also access to the widgets establishing the child contexts.
-
-
-Stacking Order
-==============
-
-The stacking order influences
-
-1. the order in which child widgets are drawn (dw::core::Widget::draw),
-   and
-2. the order in which mouse events are dispatched to child widgets
-   (dw::core::Widget::getWidgetAtPoint).
-
-The first is done from bottom to top, the latter from top to bottom.
-
-I'm here referring to the simplified description in
-<a href="http://www.w3.org/TR/CSS2/visuren.html#z-index">section
-9.9.1</a>. The table shows a recommended order for the implementations
-of dw::core::Widget::draw and dw::core::Widget::getWidgetAtPoint
-(for the latter, read from bottom to top):
- 
-<table>
-<tr>
-<th> CSS specification <th> Drawing <th> Mouse events
-<tr>
-<td> *1. the background and borders of the element forming the
-         stacking context.*
-<td> dw::core::Widget::drawBox
-<td> Nothing necessary.
-<tr>
-<td> *2. the child stacking contexts with negative stack levels (most
-         negative first).*
-<td> dw::core::StackingContextMgr::drawBottom (when defined)
-<td> dw::core::StackingContextMgr::getBottomWidgetAtPoint (when defined)
-<tr>
-<td> *3. the in-flow, non-inline-level, non-positioned descendants.*
-
-<td rowspan="4"> When (i) widget specific content is drawn, then (ii)
-                 dw::oof::OOFAwareWidget::drawOOF is called, this will
-                 have this effect:
-
-                 1. all in-flow elements are drawn,
-                 2. floats are drawn and
-                 3. positioned elements with *z-index: auto* are drawn
-                    (latter two done by
-                    dw::oof::OOFAwareWidget::drawOOF, in this order).
-
-                 This order differs from the specified order, but
-                 since floats and in-flow elements do not overlap,
-                 this difference has no effect.
-
-                 Drawing in-line elements, floats and positioned
-                 elements with *z-index: auto* and should avoid
-                 duplicate calls: Widgets drawn by
-                 dw::core::StackingContextMgr::drawBottom and by
-                 dw::core::StackingContextMgr::drawTop should be
-                 excluded here. This can be tested with
-                 dw::core::StackingContextMgr::handledByStackingContextMgr.
-
-<td rowspan="4"> Likewise, the implementation should (i) test
-                 dw::oof::OOFAwareWidget::getWidgetOOFAtPoint, and
-                 (ii) search through the chilren. Also, duplicate
-                 calls should be avoided using
-                 dw::core::StackingContextMgr::handledByStackingContextMgr.
-
-                 There are already the implementations
-                 dw::core::Widget::getWidgetAtPoint (ignoring
-                 dw::oof::OutOfFlowMgr) and
-                 dw::oof::OOFAwareWidget::getWidgetAtPoint (including
-                 dw::oof::OutOfFlowMgr).
-
-<tr>
-<td> *4. the non-positioned floats.*
-<tr>
-<td> *5. the in-flow, inline-level, non-positioned descendants,
-         including inline tables and inline blocks.*
-<tr>
-<td> (What about positioned elements with *z-index: auto*? Seems to be
-     missing in
-     <a href="http://www.w3.org/TR/CSS2/visuren.html#z-index">section
-       9.9.1</a>, but mentioned in
-     <a href="http://www.w3.org/TR/CSS2/zindex.html">appendix E</a>,
-     item 8.
-<tr>
-<td> *6. the child stacking contexts with stack level 0 and the
-         positioned descendants with stack level 0.*
-<td rowspan="2"> dw::core::StackingContextMgr::drawTop (when defined)
-<td rowspan="2"> dw::core::StackingContextMgr::getTopWidgetAtPoint
-                 (when defined)
-<tr>
-<td> *7. the child stacking contexts with positive stack levels (least
-         positive first).*
-</table>
-
-Note: This is not quite in conformance with the specification: this
-description refers to any widget, not only widgets establishing a
-stacking context. Does this make a difference?
-
-*/
\ No newline at end of file