## Summary of the Pull Request
Follow-up for #10886. The new UIA movement tests found some failing cases. This PR fixes UiaTextRangeBase to have movement match that of MS Word. In total, this fixes 64 tests.
## PR Checklist
* [X] Closes#10924
* [X] Tests added/passed
## Detailed Description of the Pull Request / Additional comments
Root causes include...
1. if we were a non-degenerate range and we failed to move, we should still expand to enclose the unit
2. non-degenerate ranges are treated as if they already encompassed their given unit.
- this one is a bit difficult to explain. Consider these examples:
1. document movement
- state: you have a 1-cell wide range on the buffer, and you try to move by document
- result: move by 0 (there is no next/prev document), but the range now encompasses the entire document
2. line movement
- state: you have a 1-cell wide range on a line, and you try to move back by a line
- result: you go to the previous line (not the beginning of this line)
- conversely, a degenerate range successfully moves to the beginning/end of the current unit (i.e. document/line)
- this (bizarre) behavior was confirmed using MS Word
As a bonus, occasionally, Narrator would get stuck when navigating by line. This issue now seems to be fixed.
## Updates to existing tests
- `CanMoveByCharacter`
- `can't move backward from (0, 0)` --> misauthored, result should be one character wide.
- `can't move past the last column in the last row` --> misauthored and already covered in generated tests
- `CanMoveByLine`
- `can't move backward from top row` --> misauthored, end should be on next line. Already covered by generated tests
- `can't move forward from bottom row` --> misauthored, end should be on next line
- `can't move backward when part of the top row is in the range` --> misauthored, should expand
- `can't move forward when part of the bottom row is in the range` --> misauthored, degenerate range moves to end of buffer
- `MovementAtExclusiveEnd`
- populate the text buffer _before_ we do a move by word operation
- update to match the now fixed behavior
## Summary of the Pull Request
The bug was that Narrator would still read the content of the old tab/pane although a new tab/pane was introduced. This is caused by the automation peer not being created when XAML requests it. Normally, we would prevent the automation peer from being created if the terminal was not fully initialized.
This change allows the automation peer to be created regardless of the terminal being fully initialized by...
- `TermControl`: `_InitializeTerminal` updates the padding (dependent on the `SwapChainPanel`) upon full initialization
- `ControlCore`: initialize the `_renderer` in the ctor so that we can attach the UIA Engine before `ControlCore::Initialize()` is called (dependent on `SwapChainPanel` loading)
As a bonus, this also fixes a locking issue where logging would attempt to get the text range's text and lock twice. The locking fix is very similar to #10937.
## PR Checklist
Closes [MSFT 33353327](https://microsoft.visualstudio.com/OS/_workitems/edit/33353327)
## Validation Steps Performed
- New pane from key binding is announced by Narrator
- New tab from key binding is announced by Narrator
Fixes a bug where interacting with Windows Terminal when using Narrator causes Windows Terminal to hang.
`UiaTextRangeBase::Move()` locks, but later calls `UiaTextRangeBase::ExpandToEnclosingUnit()` which attempts to lock again. The workaround for this is to introduce a `_expandToEnclosingUnit()` that _does not_ lock the console. Then, `Move()` calls this new method, thus only allowing one lock to be established at a time.
This bug is observed to be in v1.11.2221.0 and _not_ in v1.9.1942.0.
## Summary of the Pull Request
This implements `GetAttributeValue` and `FindAttribute` for `UiaTextRangeBase` (the shared `ITextRangeProvider` for Conhost and Windows Terminal). This also updates `UiaTracing` to collect more useful information on these function calls.
## References
#7000 - Epic
[Text Attribute Identifiers](https://docs.microsoft.com/en-us/windows/win32/winauto/uiauto-textattribute-ids)
[ITextRangeProvider::GetAttributeValue](https://docs.microsoft.com/en-us/windows/win32/api/uiautomationcore/nf-uiautomationcore-itextrangeprovider-getattributevalue)
[ITextRangeProvider::FindAttribute](https://docs.microsoft.com/en-us/windows/win32/api/uiautomationcore/nf-uiautomationcore-itextrangeprovider-findattribute)
## PR Checklist
* [X] Closes#2161
* [X] Tests added/passed
## Detailed Description of the Pull Request / Additional comments
- `TextBuffer`:
- Exposes a new `TextBufferCellIterator` that takes in an end position. This simplifies the logic drastically as we can now use this iterator to navigate through the text buffer. The iterator can also expose the position in the buffer.
- `UiaTextRangeBase`:
- Shared logic & helper functions:
- Most of the text attributes are stored as `TextAttribute`s in the text buffer. To extract them, we generate an attribute verification function via `_getAttrVerificationFn()`, then use that to verify if a given cell has the desired attribute.
- A few attributes are special (i.e. font name, font size, and "is read only"), in that they are (1) acquired differently and (2) consistent across the entire text buffer. These are handled separate from the attribute verification function.
- `GetAttributeValue`: Retrieve the attribute verification of the first cell in the range. Then, verify that the entire range has that attribute by iterating through the text range. If a cell does not have that attribute, return the "reserved mixed attribute value".
- `FindAttribute`: Iterate through the text range and leverage the attribute verification function to find the first contiguous range with that attribute. Then, make the end exclusive and output a `UiaTextRangeBase`. This function must be able to perform a search backwards, so we abstract the "start" and "end" into `resultFirstAnchor` and `resultSecondAnchor`, then perform post processing to output a valid `UiaTextRangeBase`.
- `UiaTracing`:
- `GetAttributeValue`: Log uia text range, desired attribute, resulting attribute metadata, and the type of the result.
- `FindAttribute`: Log uia text range, desired attribute and attribute metadata, if we were searching backwards, the type of the result, and the resulting text range.
- `AttributeType` is a nice way to understand/record if the result was either of the reserved UIA values, a normal result, or an error.
- `UiaTextRangeTests`:
- `GetAttributeValue`:
- verify that we know which attributes we support
- test each of the known text attributes (expecting 100% code coverage for `_getAttrVerificationFn()`)
- `FindAttribute`:
- test each of the known _special_ text attributes
- test `IsItalic`. NOTE: I'm explicitly only testing one of the standard text attributes because the logic is largely the same between all of them and they leverage `_getAttrVerificationFn()`.
## Validation Steps Performed
- @codeofdusk has been testing this Conhost build
- Tests added for Conhost and shared implementation
- Windows Terminal changes were manually verified using accessibility insights and NVDA
## Summary of the Pull Request
#7960 was caused by `UiaTextRangeBase::_blockRange` not being initialized, thus pointing to random memory. In most cases, we initialize it properly in `RuntimeClassInitialize`, however, the copying version of `RuntimeClassInitialize` doesn't actually copy it over, resulting in it still containing random memory.
NVDA (and other screen readers) occasionally use `Clone` (really just the copy initializer), resulting in this bug occurring randomly.
## PR Checklist
* [X] Closes#7960
* [X] Tests added/passed
## Validation Steps Performed
Test failed before the change, but passes after the change.
This PR adds support for the VT line rendition attributes, which allow
for double-width and double-height line renditions. These renditions are
enabled with the `DECDWL` (double-width line) and `DECDHL`
(double-height line) escape sequences. Both reset to the default
rendition with the `DECSWL` (single-width line) escape sequence. For now
this functionality is only supported by the GDI renderer in conhost.
There are a lot of changes, so this is just a general overview of the
main areas affected.
Previously it was safe to assume that the screen had a fixed width, at
least for a given point in time. But now we need to deal with the
possibility of different lines have different widths, so all the
functions that are constrained by the right border (text wrapping,
cursor movement operations, and sequences like `EL` and `ICH`) now need
to lookup the width of the active line in order to behave correctly.
Similarly it used to be safe to assume that buffer and screen
coordinates were the same thing, but that is no longer true. Lots of
places now need to translate back and forth between coordinate systems
dependent on the line rendition. This includes clipboard handling, the
conhost color selection and search, accessibility location tracking and
screen reading, IME editor positioning, "snapping" the viewport, and of
course all the rendering calculations.
For the rendering itself, I've had to introduce a new
`PrepareLineTransform` method that the render engines can use to setup
the necessary transform matrix for a given line rendition. This is also
now used to handle the horizontal viewport offset, since that could no
longer be achieved just by changing the target coordinates (on a double
width line, the viewport offset may be halfway through a character).
I've also had to change the renderer's existing `InvalidateCursor`
method to take a `SMALL_RECT` rather than a `COORD`, to allow for the
cursor being a variable width. Technically this was already a problem,
because the cursor could occupy two screen cells when over a
double-width character, but now it can be anything between one and four
screen cells (e.g. a double-width character on the double-width line).
In terms of architectural changes, there is now a new `lineRendition`
field in the `ROW` class that keeps track of the line rendition for each
row, and several new methods in the `ROW` and `TextBuffer` classes for
manipulating that state. This includes a few helper methods for handling
the various issues discussed above, e.g. position clamping and
translating between coordinate systems.
## Validation Steps Performed
I've manually confirmed all the double-width and double-height tests in
_Vttest_ are now working as expected, and the _VT100 Torture Test_ now
renders correctly (at least the line rendition aspects). I've also got
my own test scripts that check many of the line rendition boundary cases
and have confirmed that those are now passing.
I've manually tested as many areas of the conhost UI that I could think
of, that might be affected by line rendition, including things like
searching, selection, copying, and color highlighting. For
accessibility, I've confirmed that the _Magnifier_ and _Narrator_
correctly handle double-width lines. And I've also tested the Japanese
IME, which while not perfect, is at least useable.
Closes#7865
Many include statements use forward slashes, while others use backwards
slashes. This is inconsistent formatting. For this reason, I changed the
backward slashes to forward slashes since that is the standard.
`ScrollIntoView` is responsible for scrolling the viewport to include
the UTR's start endpoint. The crash was caused by `start` being at the
exclusive end, and attempting to scroll to it. This is now fixed by
clamping the result to the bottom of the buffer.
Most of the work here is to allow a test for this. `ScrollIntoView`
relied on a virtual `ChangeViewport` function. By making that
non-virtual, the `DummyElementProvider` in the tests can now be a
`ScreenInfoUiaProviderBase`. This opens up the possibility of more
UiaTextRange tests in the future too.
Closes#7839
The `MovementAtExclusiveEnd` test was improperly authored for the
following reasons:
- it should have used `TEST_METHOD_PROPERTY` to cover all of the
TextUnits
- TextUnit::Document (arguably one of the most important) was ommitted
accidentally (`!= TextUnit_Document` was used instead of `<=`)
- The created range was not `EndExclusive`, but rather, the last cell in
the buffer (`EndInclusive`)
The first half of this PR fixes the test.
The second half of this PR expands the test and fixes any related issues
to make the test pass (i.e. #7771):
- `TEST_METHOD_PROPERTY` was added for it to be degenerate (start/end at
`EndExclusive`) or not (last cell of buffer)
- `utr->_start` is now also validated after moving backwards
NOTE: `utr->_start` was not validated when moving forwards because
moving forwards should always fail when at/past the last chell in the
buffer.
Closes#7771
Conhost expands UIA text ranges when moved. This means that degenerate
ranges become non-degenerate after movement, leading to odd behaviour
from UIA clients. This PR doesn't expand degenerate ranges, but rather
keeps them degenerate by moving `_end` to the newly-changed `_start`.
Tested in the NVDA Python console (cases with `setEndPoint` and
`compareEndPoints` described in #7342). Also ran the logic by
@michaeldcurran.
Closes#7342
Almost definitely addresses nvaccess/nvda#11288 (although I'll need to
test with my Braille display). Also fixes an issue privately reported to
me by @simon818 with copy/paste from review cursor which originally lead
me to believe the issue was with `moveEndPointByRange`.
When attempting to select a text range from a different text buffer (such as a standard text range when in alt mode), conhost crashes. This PR checks for this case and returns `E_FAIL` instead, preventing this crash.
## PR Checklist
* [x] Closes unfiled crash issue
* [x] CLA signed. If not, go over [here](https://cla.opensource.microsoft.com/microsoft/Terminal) and sign the CLA
* [x] Passes manual test below
* [ ] I've discussed this with core contributors already. If not checked, I'm ready to accept this work might be rejected in favor of a different grand plan. Issue number where discussion took place: #xxx
## Validation Steps Performed
Ran the following lines in the NVDA Python console (NVDA+control+z) before and after this PR, and observed that Conhost no longer crashes after the change:
``` Python console
>>> # SSH to a remote Linux system
>>> ti=nav.makeTextInfo("caret")
>>> ti.move("line", -2)
-2
>>> # Switch away from the NVDA Python console, and run Nano in conhost. Then:
>>> ti.updateSelection() # Calls select() on the underlying UIA text range
Traceback (most recent call last):
File "<console>", line 1, in <module>
File "NVDAObjects\UIA\__init__.pyc", line 790, in updateSelection
File "comtypesMonkeyPatches.pyc", line 26, in __call__
_ctypes.COMError: (-2147220991, 'An event was unable to invoke any of the subscribers', (None, None, None, 0, None))
```
In UiaTextRange, `_getBufferSize` returns an optimized version of the
size of the buffer to be the origin and the last character in the
buffer. This is to improve performance on search or checking if you are
currently on the last word/line.
When setting the endpoint and drawing the bounding rectangles, we should
be retrieving the true buffer size. This is because it is still possible
to create UiaTextRanges that are outside of this optimized size. The
main source of this is `ExpandToEnclosingUnit()` when the unit is
`Document`. The end _should_ be the last visible character, but it isn't
because that would break our tests.
This is an incomplete solution. #6986 is a follow up to completely test
and implement the solution.
The crash in #6402 was caused by getting the document range (a range of
the full text buffer), then moving the end by one character. When we
get the document range, we get the optimized size of the buffer (the
position of the last character). Moving by one character is valid
because the buffer still has more to explore. We then crash from
checking if the new position is valid on the **optimized size**, not the
**real size**.
REFERENCES
#6986 - follow up to properly handle/test this "end of buffer" problem
Closes#6402
## Summary of the Pull Request
This is a quick-and-easy solution to #5309. If the ITextRangeProvider API allows us to take in two UiaTextRanges, we need to verify that they are both valid.
With this PR, we make sure they both fit in the current TextBuffer. If not, we return `E_FAIL`. Though this doesn't prove that both UiaTextRanges are from the same TextBuffer, at the very least we don't crash and in cases where we can't make a valid comparison, we return an HRESULT failure.
## References
#5406 - This should be the proper solution to this problem. Each UiaTextRange needs to be aware of which TextBuffer it came from.
## PR Checklist
* [X] Closes#5309
## Validation Steps Performed
1. generate enough output to cause the terminal to scroll
2. execute `nano` to make us go into the alternate buffer
This previously crashed, now NVDA seems to detect that there was an error and keeps moving along.
The scroll locking rework that landed with the DxRenderer's partial
invalidation change introduced a deadlock. UIA locks the buffer for
reading before asking it to scroll (which now requires a write lock.)
Scrolling is probably _okay_ to have a little bit of torn state that
might arise from us unlocking the read lock early before triggering the
write lock down the line.
While investigating this, I also noticed that our bounding rects stopped
being viewport-relative (and were instead buffer-relative.) That
regressed with the switch to `GetTextRects` in #4991
## PR Checklist
* [ ] Closes (issues noticed in investigating the DPI changes)
* [x] CLA signed.
* [ ] Tests added/passed
* [ ] Requires documentation to be updated
* [x] Core contributor badge
## Validation Steps Performed
Manual pass with inspect.exe
## Summary of the Pull Request
In preparation for getting more accessibility-related issues, I added an ID to the `ScreenInfoUiaProvider` (SIUP) and abstracted the one from `UiaTextRange`. Using this, I noticed that we are creating SIUPs when a new tab/pane is created. This is _good_. This means that we need to somehow notify a UIA Client that out structure has changed, and we need to use the new SIUP because the old one has been removed.
I'll be investigating that more after this PR lands.
## Summary of the Pull Request
- Added better wide glyph support for UIA. We used to move one _cell_ at a time, so wide glyphs would be read twice.
- Converted a few things to use til::point since I'm already here.
- fixed telemetry for UIA
## PR Checklist
* [x] Closes#1354
## Detailed Description of the Pull Request / Additional comments
The text buffer has a concept of word boundaries, so it makes sense to have a concept of glyph boundaries too.
_start and _end in UiaTextRange are now til::point
## Validation Steps Performed
Verified using Narrator
## Summary of the Pull Request
Block selections were always read and displayed as line selections in UIA. This fixes that.
## PR Checklist
* [x] Closes#4509
## Detailed Description of the Pull Request / Additional comments
1. Expose `IsBlockSelection()` via IUiaData
2. Update the constructor to be able to take in a block selection parameter
3. Make ScreenInfoUiaProviders pass step 1 output into step 2 constructor
4. Update all instances of `UiaTextRange::GetTextRects()` to include this new flag
## Validation Steps Performed
Manually tested.
Additional tests would be redundant as GetTextRects() is tested in the text buffer.
## Summary of the Pull Request
`GetTextForClipboard` already exists in the TextBuffer. It makes sense to use that for UIA as well. This changes the behavior or `GetText()` such that it does not remove leading/trailing whitespace anymore. That is more of an expected behavior.
## References
This also contributes to...
- #4509: UIA Box Selection
- #2447: UIA Signaling for Selection
- #1354: UIA support for Wide Glyphs
Now that the expansion occurs at before render-time, the selection anchors are an accurate representation of what is selected. We just need to move GetText to the TextBuffer. Then we can have those three issues just rely on code from the text buffer. This also means ConHost gets some of this stuff for free 😀
## Detailed Description of the Pull Request / Additional comments
- `TextBuffer::GetTextForClipboard()` --> `GetText()`
- `TextBuffer::GetText()` no longer requires GetForegroundColor/GetBackgroundColor. If either of these are not defined, we return a `TextAndColor` with only the `text` field populated.
- renamed a few parameters for copying text to the clipboard for clarity
- Updated `UiaTextRange::GetText()` to use `TextBuffer::GetText()`
## Validation Steps Performed
Manual tests for UIA using accessibility insights and Windows Terminal's copy action (w/ and w/out shift)
Added tests as well.
## Summary of the Pull Request
1) Improves the performance of word-recognition operations such as word
navigation in UIA and selection.
2) Fixes a bug where attempting to find the next word in UIA, when none
exists, would hang
3) TraceLogging code only runs when somebody is listening
## Detailed Description of the Pull Request / Additional comments
- The concept of a delimiter class got moved to the CharRow.
- The buffer iterator used to save a lot more information than we needed
- I missed updating a tracing function after making GetSelection return
one text range. That is fixed now.
## Validation Steps Performed
Performed Word Navigation under Narrator and NVDA.
NOTE: The release build should be used when testing to optimize
performance
Closes#4703
## Summary of the Pull Request
Debugging our custom UIA providers has been a painful experience because outputting content to VS may result in UIA Clients getting impatient and giving up on extracting data.
Adding tracing allows us to debug these providers without getting in the way of reproducing a bug. This will help immensely with developing accessibility features on Windows Terminal and Console.
This pull request additionally contains payload from #4526:
* Make GetVisibleRanges() return one range (and add tracing for it).
`ScreenInfoUiaProvider::GetVisibleRanges()` used to return one range per line of visible text. The documentation for this function says that we should return one per contiguous span of text. Since all of the text in the TermControl will always be contiguous (at least by our standards), we should only ever be returning one range.
## PR Checklist
* [x] Closes#1914. Closes#4507.
* [x] CLA signed
## Detailed Description of the Pull Request / Additional comments
`UiaTracing` is a singleton class that is in charge of registration for trace logging. `TextRange` is used to trace `UiaTextRange`, whereas `TextProvider` is used to trace `ScreenInfoUiaProviderBase`.
`_getValue()` is overloaded to transform complex objects and enums into a string for logging.
`_getTextValue()` had to be added to be able to trace the text a UiaTextRange included. This makes following UiaTextRanges much simpler.
## Validation Steps Performed
Performed a few operations when under NVDA/Narrator and manually checked the results.
## Summary of the Pull Request
We used to return multiple text ranges to represent one selection. We only support one selection at a time, so we should only return one range.
Additionally, I moved all TriggerSelection() calls to the renderer from Terminal to TermControl for consistency. This ensures we only call it _once_ when we make a change to our selection state.
## References
#2447 - helps polish Signaling for Selection
#4465 - This is more apparent as the problem holding back Signaling for Selection
## PR Checklist
* [x] Closes#4452
Tested using Accessibility Insights.
## Summary of the Pull Request
In UIA Providers, update the concept of the size of the text buffer to just go down to the virtual bottom. This significantly increases performance to the point that it can even be used in the Debug build.
## PR Checklist
* [x] Closes#4485
* [x] CLA signed.
## Detailed Description of the Pull Request / Additional comments
We already actually have this concept exposed to us via the IUiaData. So we're just leveraging that and putting it in a helper function `_getBufferSize()`.
## Validation Steps Performed
Tested word nav on Narrator (previously hung). Now it works on the Debug build. Previously, using the release build was necessary to be able to test this feature.
GetBoundingRect() has inclusive endpoints. I previously assumed end was exclusive so I drew the bounding rect wrong.
This also means that we should allow start and end to be the same. Which means that FailFastIf would get hit...
Moved `FindText` to `UiaTextRangeBase`. Now that Search is a shared component (thanks #3279), I can just reuse it basically as-is.
#3279 - Make Search a shared component
#4018 - UiaTextRange Refactor
I removed it from the two different kinds of UiaTextRange and put it in the base class.
I needed a very minor change to ensure we convert from an inclusive end (from Search) to an exclusive end (in UTR).
Worked with `FindText` was globally messed with in windows.h. So we had to do a few weird things there (thanks Michael).
No need for additional tests because it _literally_ just sets up a Searcher and calls it.
## Summary of the Pull Request
This pull request is intended to achieve the following goals...
1) reduce duplicate code
2) remove static functions
3) improve readability
4) improve reliability
5) improve code-coverage for testing
6) establish functioning text buffer navigation in Narrator and NVDA
This also required a change to the wrapper class `XamlUiaTextRange` that has been causing issues with Narrator and NVDA.
See below for additional context.
## References
#3976 - I believe this might have been a result of improperly handling degenerate ranges. Fixed here.
#3895 - reduced the duplicate code. No need to separate into different files
#2160 - same as #3976 above
#1993 - I think just about everything is no longer static
## PR Checklist
* [x] Closes#3895, Closes#1993, Closes#3976, Closes#2160
* [x] CLA signed
* [x] Tests added/passed
## Detailed Description of the Pull Request / Additional comments
### UiaTextRange
- converted endpoints into the COORD system in the TextBuffer coordinate space
- `start` is inclusive, `end` is exclusive. A degenerate range is when start == end.
- all functions are no longer static
- `MoveByUnit()` functions now rely on `MoveEndpointByUnit()` functions
- removed unnecessary typedefs like `Endpoint`, `ScreenInfoRow`, etc..
- relied more heavily on existing functionality from `TextBuffer` and `Viewport`
### XamlUiaTextRange
- `GetAttributeValue()` must return a special HRESULT that signifies that the requested attribute is not supported. This was the cause of a number of inconsistencies between Narrator and NVDA.
- `FindText()` should return `nullptr` if nothing was found. #4373 properly fixes this functionality now that Search is a shared module
### TextBuffer
- Word navigation functionality is entirely in `TextBuffer` for proper abstraction
- a total of 6 functions are now dedicated to word navigation to get a good understanding of the differences between a "word" in Accessibility and a "word" in selection
As an example, consider a buffer with this text in it:
" word other "
In selection, a "word" is defined as the range between two delimiters, so the words in the example include [" ", "word", " ", "other", " "].
In accessibility , a "word" includes the delimiters after a range of readable characters, so the words in the example include ["word ", "other "].
Additionally, accessibility word navigation must be able to detect if it is on the first or last word. This resulted in a slight variant of word navigation functions that return a boolean instead of a COORD.
Ideally, these functions can be consolidated, but that is too risky for a PR of this size as it can have an effect on selection.
### Viewport
- the concept of `EndExclusive` is added. This is used by UiaTextRange's `end` anchor as it is exclusive. To signify that the last character in the buffer is included in this buffer, `end` must be one past the end of the buffer. This is `EndExclusive`
- Since many functions check if the given `COORD` is in bounds, a flag must be set to allow `EndExclusive` as a valid `COORD` that is in bounds.
### Testing
- word navigation testing relies more heavily on TextBuffer tests
- additional testing was created for non-movement focused functions of UiaTextRange
- The results have been compared to Microsoft Word and some have been verified by UiAutomation/Narrator contacts as expected results.
## Validation Steps Performed
Tests pass
Narrator works
NVDA works
Enables support for word navigation when using an automation client (i.e.: Narrator, etc...). Specifically, adds this functionality to the UiaTextRange class. The only delimiter used is whitespace because that's how words are separated in English.
# General "Word Movement" Expectations
The resulting text range should include any word break characters that are present at the end of the word, but before the start of the next word. (Source)
If you already are on a word, getting the "next word" means you skip the word you are on, and highlight the upcoming word appropriately. (similar idea when moving backwards)
# Word Expansion
Since word selection is supposed to detect word delimiters already, I figured I'd reuse that code. I moved it from TerminalCore to the TextBuffer.
Then I built on top of it by adding an optional additional parameter that decides if you want to include...
- the delimiter run when moving forward
- the character run when moving backwards
It defaults to false so that we don't have to care when using it in selection. But we change it to true when using it in our UiaTextRange
# UiaTextRange
The code is based on character movement. This allows us to actually work with boundary conditions.
The main thing to remember here is that each text range is recorded as a MoveState. The text range is most easily defined when you think about the start Endpoint and the end Endpoint. An Endpoint is just a linear 1-dimensional indexing of the text buffer. Examples:
- Endpoint 0 --> (0,0)
- Endpoint 79 --> (79,0) (when the buffer width is 80)
- Endpoint 80 -->(0,1) (when the buffer width is 80)
- When moving forward, the strategy is to focus on moving the end Endpoint. That way, we properly get the indexing for the "next" word (this also fixes a wrapping issue). Then, we update the start Endpoint. (This is reversed for moving backwards).
- When moving a specific Endpoint, we just have a few extra if statements to properly adjust for moving start vs end.
# Hooking it up
All we really had to do is add an enum. This part was super easy :)
I originally wanted the delimiters to be able to be defined. I'm not so sure about that anymore. Either way, I hardcoded our delimiter into a variable so if we ever want to expand on it or make that customizable, we just modify that variable.
# Defining your own word delimiters
- Import a word delimiter into the constructor of the ScreenInfoUiaProvider (SIUP)
- This defines a word delimiter for all the UiaTextRanges (UTR) created by in this context
- import a word delimiter into the UTR directly
- this provides more control over what a "word" is
- this can be useful if you have an idea of what text a particular UTR will encounter and you want to customize the word navigation for it (i.e consider adding / or \\ for file paths)
The default param of " " is scattered throughout because this is the word delimiter used in the English language.
* Switch all of the UIA providers to WRL::RuntimeClass
Fixes#3209.
References #3051.
Co-authored-by: Carlos Zamora <cazamor@microsoft.com>
Co-authored-by: Dustin Howett <duhowett@microsoft.com>
Refactors the accessibility providers (ScreenInfoUiaProvider and UiaTextRange) into a better separated model between ConHost and Windows Terminal.
ScreenInfoUiaProviderBase and UiaTextRangeBase are introduced. ConHost and Windows Terminal implement their own versions of ScreenInfoUiaProvider and UiaTextRange that inherit from their respective base classes.
WindowsTerminal's ScreenInfoUiaProvider --> TermControlUiaProvider
2019-08-20 16:32:44 -07:00
Renamed from src/types/UiaTextRange.cpp (Browse further)
