Add on-screen keyboard to InkHUD (#9445)

* Added keyboard option to menu. Shows a keyboard layout but does not type.

* Keyboard types into text box and wraps.

* send FreeText messages from the send submenu

- renamed `KEYBOARD` action to `FREE_TEXT` and moved its menu location
to the send submenu
- opening the FreeText applet from the menu keeps the menu open and
disabled the timeout
- the FreeText applet writes to inkhud->freetext
- the sending a canned message checks inkhud->freetext and if it isn't
empty, sends and clears the inkhud->freetext

* Text scrolls along with input

* handle free text message completion as an event

implements `handleFreeText` and `OnFreeText()` for system applets to
interface with the FreeText Applet

The FreeText Applet generates an `OnFreeText` event when completing a
message which is handled by the first system applet with the
`handleFreeText` flag set to true.

The Menu Applet now handles this event.

* call `onFreeText` whenever the FreeText Applet exits

allows the menu to consistently restart its auto-close timeout

* Add text cursor

* Change UI to remove the header and make text box longer
Keyboard displays captial letters for legibility
Keyboard types captial letters with long press

* center FreeText keys and draw symbolic buttons

Move input field and keyboard drawing to their own functions:
- `drawInputField()`
- `drawKeyboard()`

Store the keys in a 1-dimensional array

Implement a matching array, `keyWidths`, to set key widths relative to
the font size

* Add character limit and counter

* Fix softlock when hitting character limit

* Move text box as its own menu page

* rework FreeTextApplet into KeyboardApplet

- The Keyboard Applet renders an on-screen keyboard at the lower portion
of the screen.
- Calling `inkhud->openKeyboard()` sends all the user applets to the
background and resizes the first system applet with `handleFreeText` set
to True to fit above the on-screen keyboard
- `inkhud->closeKeyboard()` reverses this layout change

* Fix input box rendering and add character limit to menu free text

* remove FREE_TEXT menu page and use the FREE_TEXT menu action solely

* force update when changing the free text message

* reorganize KeyboardApplet

- add comments after each row of `key[]` and `keyWidths[]` to preserve
formatting

- The selected key is now set using the key index directly

- rowWidths are pre-calculated in the KeyboardApplet constructor

- removed `drawKeyboard()` and implemented `drawKeyLabel()`

* implement `Renderer::clearTile()` to clear the region below a tile

* add parameter to forceUpdate() for re-rendering the full screen

setting the `all` parameter to true in `inkhud->forceUpdate()` now
causes the full screen buffer to clear an re-render. This is helpful for
when sending applets to the background and the UI needs a clean canvas.

System Applets can now set the `alwaysRender` flag true which causes it
to re-render on every screen update. This is set to true in the Battery
Icon Applet.

* clean up tile clearing loops

* implement dirty rendering to let applets draw over their previous render

- `Applet::requestUpdate()` now has an optional flag to keep the old
canvas

- If honored, the renderer calls `render(true)` which runs
`onDirtyRender()` instead of `onRender()` for said applet

- The renderer will not call a dirty render if the full screen is
getting re-rendered

* simplify arithmetic in clearTile for better understanding

* combine Applet::onRender() and Applet::onDirtyRender() into Applet::onRender(bool full)

- add new `full` parameter to onRender() in every applet. This parameter
can be ignored by most applets.

- `Applet::requestUpdate()` has an optional flag that requests a full
render by default

* implement tile and partial rendering in KeyboardApplet

* add comment for drawKeyLabel()

* improve clarity of byte operations in clearTile()

* remove typo and commented code

* fix inaccurate comments

* add null check to openKeyboard() and closeKeyboard()

---------

Co-authored-by: zeropt <ferr0fluidmann@gmail.com>
Co-authored-by: HarukiToreda <116696711+HarukiToreda@users.noreply.github.com>

src/graphics/niche/InkHUD/Applets/System/Logo/LogoApplet.cpp

@@ -30,7 +30,7 @@ InkHUD::LogoApplet::LogoApplet() : concurrency::OSThread("LogoApplet")
     // This is then drawn with a FULL refresh by Renderer::begin
 }
 
-void InkHUD::LogoApplet::onRender()
+void InkHUD::LogoApplet::onRender(bool full)
 {
     // Size  of the region which the logo should "scale to fit"
     uint16_t logoWLimit = X(0.8);
@@ -120,7 +120,7 @@ void InkHUD::LogoApplet::onBackground()
 
     // Need to force an update, as a polite request wouldn't be honored, seeing how we are now in the background
     // Usually, onBackground is followed by another applet's onForeground (which requests update), but not in this case
-    inkhud->forceUpdate(EInk::UpdateTypes::FULL);
+    inkhud->forceUpdate(EInk::UpdateTypes::FULL, true);
 }
 
 // Begin displaying the screen which is shown at shutdown
@@ -138,10 +138,10 @@ void InkHUD::LogoApplet::onShutdown()
     // Intention is to restore display health.
 
     inverted = true;
-    inkhud->forceUpdate(Drivers::EInk::FULL, false);
+    inkhud->forceUpdate(Drivers::EInk::FULL, true, false);
     delay(1000); // Cooldown. Back to back updates aren't great for health.
     inverted = false;
-    inkhud->forceUpdate(Drivers::EInk::FULL, false);
+    inkhud->forceUpdate(Drivers::EInk::FULL, true, false);
     delay(1000); // Cooldown
 
     // Prepare for the powered-off screen now
@@ -176,7 +176,7 @@ void InkHUD::LogoApplet::onReboot()
     textTitle = "Rebooting...";
     fontTitle = fontSmall;
 
-    inkhud->forceUpdate(Drivers::EInk::FULL, false);
+    inkhud->forceUpdate(Drivers::EInk::FULL, true, false);
     // Perform the update right now, waiting here until complete
 }