Character Map: Added larger character popup on left-click

Fixes #15983.

Added left-click support to the existing function that pops up the context
menu for copying characters. Instead of menu options, put a large version
of the currently-selected character in the popup on left-click. The popup
character is 2.5 times as large as the current font size, because that
seemed nicer than 2 times.

Right-click functionality is unchanged.

Change-Id: I3b64fff3cafc02e2c54e34db6e58461b4e08b3b9
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2832
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

CharacterMap: gray out blocks that aren't supported by the current font

Fixes #15982.

Added font to UnicodeBlockView. Cache Unicode "Blocks" for both
UnicodeBlockView and CharacterView. Added lookup of non-Be Unicode blocks
(i.e. blocks with 'kNoBlock' specified). Gray out non-found blocks.

NOTE: tested fontconfig extensively in another environment and the shown
blocks match what fontconfig returns. However, you may sometimes see
characters in blocks that aren't 'included' in a font. I haven't figured
out why that occurs.

Change-Id: Ia3c7f8ccc6dc43c5ce062ed002846c861a8fa223
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2739
Reviewed-by: Axel Dörfler <axeld@pinc-software.de>

CharacterMap: several fixes to char. view scroll

* Select items in the encoding list by block identifier rather than
list index (there are holes in the list)
* Scroll to the start of the list when the application starts
* Add and use IsBlockVisible to detect when we need to make a block
visible, avoiding unwanted scrollings in some cases with the previous
method of testing for only one character in the block.

Signed-off-by: Adrien Destugues <pulkomandy@gmail.com>

Fixes some problems with previous enhancements from #3651.

* Added CharacterView::ScrollToCharacter(), and IsCharacterVisible().
* On text drops, the character map is now scrolling to the first character
dropped. This is helpful to see the code of a character as well as the block
it is contained in.
* Fixed a bug in CharacterView::_FrameFor() that would not return the correct
vertical position.
* Made a few methods const.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@38863 a95241bf-73f2-0310-859d-f6bbb57e9c96

Fix warnings in charactermap
* no need to overload ScrollTo() with a non-related method - renamed local
ScrollTo() to ScrollToBlock()


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@38268 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Reverted r30529 as this was pretty much bogus (sorry stpere, but the size of
the window was already set with its constructor).
* Fixed the actual cause of bug #3752 instead: the fCharacterHeight and
fTitleHeight members were not initialized when MinSize() was called.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@30629 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Tried to make the scrolling position less surprising when resizing the window.
Sometimes it even seems to work :-)
* FrameResized() called _UpdateSize(), although DoLayout() already did so.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29910 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added support for copying characters into the clipboard via Command-C, and
a popup menu.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29852 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Removed unused MessageReceived() method.
* Made the standard character width a bit wider.
* When moving a character around, it was incorrectly centered in the bitmap
(StringWidth() was called from the wrong view).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29826 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added a string view that shows the character's code on mouse over, the
character gets also highlighted.
* Added support for dragging a character. Holding shift (or option) while
dragging will copy an UTF-8 hex string instead.
* Minor cleanup.
* Is there any reason BStringView restricts its maximum width?


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29825 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Started an application showing the Unicode character map.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29815 a95241bf-73f2-0310-859d-f6bbb57e9c96

CharacterMap: several fixes to char. view scroll

* Select items in the encoding list by block identifier rather than
list index (there are holes in the list)
* Scroll to the start of the list when the application starts
* Add and use IsBlockVisible to detect when we need to make a block
visible, avoiding unwanted scrollings in some cases with the previous
method of testing for only one character in the block.

Signed-off-by: Adrien Destugues <pulkomandy@gmail.com>

Fixes some problems with previous enhancements from #3651.

* Added CharacterView::ScrollToCharacter(), and IsCharacterVisible().
* On text drops, the character map is now scrolling to the first character
dropped. This is helpful to see the code of a character as well as the block
it is contained in.
* Fixed a bug in CharacterView::_FrameFor() that would not return the correct
vertical position.
* Made a few methods const.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@38863 a95241bf-73f2-0310-859d-f6bbb57e9c96

Fix warnings in charactermap
* no need to overload ScrollTo() with a non-related method - renamed local
ScrollTo() to ScrollToBlock()


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@38268 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Reverted r30529 as this was pretty much bogus (sorry stpere, but the size of
the window was already set with its constructor).
* Fixed the actual cause of bug #3752 instead: the fCharacterHeight and
fTitleHeight members were not initialized when MinSize() was called.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@30629 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Tried to make the scrolling position less surprising when resizing the window.
Sometimes it even seems to work :-)
* FrameResized() called _UpdateSize(), although DoLayout() already did so.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29910 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added support for copying characters into the clipboard via Command-C, and
a popup menu.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29852 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Removed unused MessageReceived() method.
* Made the standard character width a bit wider.
* When moving a character around, it was incorrectly centered in the bitmap
(StringWidth() was called from the wrong view).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29826 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added a string view that shows the character's code on mouse over, the
character gets also highlighted.
* Added support for dragging a character. Holding shift (or option) while
dragging will copy an UTF-8 hex string instead.
* Minor cleanup.
* Is there any reason BStringView restricts its maximum width?


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29825 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Started an application showing the Unicode character map.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29815 a95241bf-73f2-0310-859d-f6bbb57e9c96