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* If pointer was hidden-until-next-mouse-move, the act of confining the mouse
  to the error box window no longer causes it to be redisplayed.
* In error boxes, the pointer and the IconHigh highlight are now initially
  positioned over the rightmost (default) button. There is one exception to
  this rule: when "Next task" is clicked in a Watchdog window, the pointer
  stays over the "Next task" button.

Version 4.13. Tagged as 'Wimp-4_13'

  builds: now behaves like desktop builds (only detects button-down events).
* When mouse pointer is hidden following Wimp_Extend 12, changes of mouse
  button state will no longer cause the pointer to be reinstated.

Version 4.12. Tagged as 'Wimp-4_12'

Added options file for Ursula_RiscPC builds: similar to Ursula options file, but without UTF8 support (it's unlikely the rest of the modules will be updated sufficiently for this to be useful) and without the development cut-n-paste support. Also removed module postfix (we don't want "Ursula" appearing during a *Help Modules).

Retagged as bavison_Wimp-4_11.

Optimisation to new WimpSymbol substitution code: in icons containing fonts other than the desktop font, the substitution table is only calculated when a symbol character is encountered.

Embryonic cut-n-paste support introduced (currently in desktop builds only):
  * workspace is allocated and initialised;
  * extended Wimp_GetCaretPosition implemented;
  * pushfontstring adapted to allow insertion of arbitrary control sequences in
    font strings (to allow selected text to be plotted in inverted colours).
Inverted, unfilled text icons now work properly again in <256-colour modes.
Reworked NC error box code: see Doc.IconHigh.

Version 4.11. Tagged as 'Wimp-4_11'

* Deprecated Font SWIs no longer used
* Height of UTF-8 strings now calculated correctly
* Fancy fonts in icons are now aligned the same as outline desktop-font icons
* Text rubout boxes for icons with text above the sprite are correctly sized

Lazy WimpSymbol subsitution implemented: characters are only substituted if
they are not already present in the font. For the first time, substitution
now works in UTF-8 text - but for the proper Unicode positions of the
relevant symbols, instead of usurping undefined positions (as in other
alphabets).

Version 4.10. Tagged as 'Wimp-4_10'

Adapted assembly process so that the choice of Options file (previously based purely on the "System" variable) can be overridden by passing "OPTIONS=foo" as an argument to either MkRom, or to amu/amu_machine directly, or indirectly, by specifying it in the components file for a build. To accomplish this, it was necessary to switch from using aasm to objasm - hence the large number of source files affected in this commit.

Version 4.09. Tagged as 'Wimp-4_09'

Bugfix: the opening-windows list could get corrupted if int_flush_opens was called while a command window was active - but only if autoscrolling of windows was compiled in. In practice, this meant that OmniClient often hung desktop machines.

Version 4.08. Tagged as 'Wimp-4_08'

Service_SwitchingOutputToSprite code optimised: graphics parameters are now only cached when making the first Wimp_PlotIcon call while output is switched to a sprite, and upon return to screen output after such an occurrence.

All error box templates featuring "border" icons updated to have button type
0 (never). This prevents IconHigh from mistakenly allowing them to be selected.

Version 4.07. Tagged as 'Wimp-4_07'

Service_SwitchingOutputToSprite code optimised: graphics parameters are now only cached when making the first Wimp_PlotIcon call while output is switched to a sprite, and upon return to screen output after such an occurrence.

 
All error box templates featuring "border" icons updated to have button type
0 (never). This prevents IconHigh from mistakenly allowing them to be selected.

Version 4.07. Tagged as 'Wimp-4_07'

UTF-8 support from previous version switched in; additional alphabet- conditional support added as follows:

* Correctly converts character index returned from Font_FindCaret into byte
  index into raw string.
* Left-arrow, right-arrow, delete-left and delete-right now act as far as
  the next character boundary, instead of to the next byte.
* Menu item text justification works again (it relies on overwriting spaces
  with hard space characters, which are two-byte characters in UTF-8).
* General key handling code has been rewritten. The Wimp now has three
  internal key input buffers - one each for taking keyboard-generated,
  task-generated, and function-key-generated strings. Each input buffer is
  processed in chunks of one character, rather than one byte; malformed
  UTF-8 characters are rejected, so tasks don't have to worry about them
  (simplifying their character-handling code). There is also a key output
  buffer, to ensure that (UTF-8) sequences of Key_Pressed events are not
  broken up.
* As a result of the above, multiple calls to Wimp_ProcessKey are now
  possible between calls to Wimp_Poll. Previously, this resulted in bytes
  getting jumbled up - making it useless for input of UTF-8 characters.
* Multi-byte characters are inserted into writeable icons in one go, so you
  don't see a brief flicker of the "malformed character" symbol while the
  initial bytes are being inserted.
* Multi-byte characters that don't entirely fit in a writeable icon buffer
  are not inserted at all.
* A new validation string command ("U") can limit the contents of a
  writeable by number of characters, instead of bytes. This will hide the
  character sizes from the user interface.
* Allowable characters (validation string command "A") now works on Unicode
  characters and character ranges.
* Various other minor bugs are fixed (Wimp_ProcessKey 13 can activate a
  writeable menu item, Shift-arrow keys are always consistent in firing off
  Key_Pressed events, etc.)
* Password icons supported: one symbol is displayed for each character
  (instead of for each byte); the display character (validation string
  command "D") can be any UTF-8 character; correctly displays the caret
  after set-caret-by-index calls, even though characters in the processed
  string are different width to those in the raw string, in password icons.

Other changes:
* The border around NC-style error boxes is resized when the error window
  is grown or shrunk.
* Messages, CmdHelp and Template files made consistent across resource
  directories, including support for all Ursula features.
* ShrinkableAreas turned back on in System=RCA builds.
* User interface features of desktop OS builds standardised.

Version 4.06. Tagged as 'Wimp-4_06'

UTF-8 support from previous version switched in; additional alphabet- conditional support added as follows: 

* Correctly converts character index returned from Font_FindCaret into byte
  index into raw string.
* Left-arrow, right-arrow, delete-left and delete-right now act as far as
  the next character boundary, instead of to the next byte.
* Menu item text justification works again (it relies on overwriting spaces
  with hard space characters, which are two-byte characters in UTF-8).
* General key handling code has been rewritten. The Wimp now has three
  internal key input buffers - one each for taking keyboard-generated,
  task-generated, and function-key-generated strings. Each input buffer is
  processed in chunks of one character, rather than one byte; malformed
  UTF-8 characters are rejected, so tasks don't have to worry about them
  (simplifying their character-handling code). There is also a key output
  buffer, to ensure that (UTF-8) sequences of Key_Pressed events are not
  broken up.
* As a result of the above, multiple calls to Wimp_ProcessKey are now
  possible between calls to Wimp_Poll. Previously, this resulted in bytes
  getting jumbled up - making it useless for input of UTF-8 characters.
* Multi-byte characters are inserted into writeable icons in one go, so you
  don't see a brief flicker of the "malformed character" symbol while the
  initial bytes are being inserted.
* Multi-byte characters that don't entirely fit in a writeable icon buffer
  are not inserted at all.
* A new validation string command ("U") can limit the contents of a
  writeable by number of characters, instead of bytes. This will hide the
  character sizes from the user interface.
* Allowable characters (validation string command "A") now works on Unicode
  characters and character ranges.
* Various other minor bugs are fixed (Wimp_ProcessKey 13 can activate a
  writeable menu item, Shift-arrow keys are always consistent in firing off
  Key_Pressed events, etc.)
* Password icons supported: one symbol is displayed for each character
  (instead of for each byte); the display character (validation string
  command "D") can be any UTF-8 character; correctly displays the caret
  after set-caret-by-index calls, even though characters in the processed
  string are different width to those in the raw string, in password icons.
 
Other changes:
* The border around NC-style error boxes is resized when the error window
  is grown or shrunk.
* Messages, CmdHelp and Template files made consistent across resource
  directories, including support for all Ursula features.
* ShrinkableAreas turned back on in System=RCA builds.
* User interface features of desktop OS builds standardised.

Version 4.06. Tagged as 'Wimp-4_06'

Version 4.05. Tagged as 'Wimp-4_05'

Following resources updated for Ursula changes: Germany/Ursula, Japan/NC2,
UK/NC2. Others will probably still need doing.

Version 4.04. Tagged as 'Wimp-4_04'

Added resources for Denmark, Finland, Norway and Sweden, to support the NC2 Scandinavian user-interfaces.

Version 4.03. Tagged as 'Wimp-4_03'

Version 4.02. Tagged as 'Wimp-4_02'

Version 4.01. Not tagged

Changed to use srccommit.
All conditionals on "Version" removed.

Version 4.01. Tagged as 'Wimp-4_01'

Made options files specify any text wanted after the module version number.
Auto-fronting iconbar now returns to previous position rather than back, so
it interacts with Shift+F12 better.