TextDocument::set_spans() now also takes a "span collection index"
argument.
TextDocument keeps a map between a span collection index and its spans.
It merges the spans from all collections into a single set of spans
whenever set_spans() is called.
This allows us to style a document with multiple layers of spans, where
as previously we only supported a single layer of spans that was set
from the SyntaxHighlighter.
This impacts text editors' ctrl+left, ctrl+shift+right, ctrl+backspace,
etc..
For example, consider the text "Hello world |", pressing
ctrl+backspace each time.
Before: "hello world |"
"hello world|"
"hello |"
"hello|"
"|"
After: "hello world |"
"hello|"
"|"
Note that this breaks a nice symmetry. Doing ctrl+left and then
ctrl+right doesn't necessarily get you to the same place like it use to.
Before: " hello |"
" hello| "
" hello |" // same as initial
After: " hello |"
"|hello "
" hello| " // different from initial
There used to be the silly bug that when the cursor was already at the
end of a span (e.g. because the user just pressed Ctrl-Right), then
Ctrl-Right had no effect.
This bug does not appear with Ctrl-Left because due to the order in
which the spans are iterated, the effective result is always correct.
This patch also makes it more apparent that the algorithm is
unnecessarily inefficient.
This is a helpful option to prevent unwanted side effects, distinguish
between user and programmatic input, etc. Sliders and SpinBoxes were
implementing it idiosyncratically, so let's generalize the API and
give Buttons and TextEditors the same ability.
Previously, pressing 'x' for deletion on an otherwise empty line
insinuated a crash in TextEditor because a nonexistent code point was
accessed -- likewise for visual mode.
In Vim's insert mode, Ctrl-W deletes the word before the cursor, like
Ctrl-Backspace. Unlike Ctrl-Backspace, if only whitespace exists between
the end of the word and the cursor, the word will be deleted with the
whitespace.
To do so, this commit introduces two methods: delete_previous_word() for
TextEditor and first_word_before() for TextDocument, where the former
depends on the latter. delete_previous_word() is then called in
VimEditingEngine.
This replaces ctype.h with CharacterType.h everywhere I could find
issues with narrowing conversions. While using it will probably make
sense almost everywhere in the future, the most critical places should
have been addressed.
UndoStack will now merge adjacent commands *if they want to be merged*
instead of bundling everything you push onto it until you tell it
to "finalize the combo."
This uses less memory and gives applications full control over how
their undo stacks end up. :^)
Have TextDocument listen for state changes on the internal undo stack,
and forward those to all clients via a new virtual function.
This simplifies updating the can_undo / can_redo states of TextEditor.
This patch removes an incorrect way for TextDocument::text_in_range
to return early when the first line of the selection was empty. This
fixes an issue in TextEditor where the status bar showed that 0
characters are selected when the selection started on an empty line.
Until now, this has been hackishly tracked by the TextEditor app's
main widget. Let's do it in GUI::TextDocument instead, so that anyone
who uses this class can know whether it's modified or not.
SPDX License Identifiers are a more compact / standardized
way of representing file license information.
See: https://spdx.dev/resources/use/#identifiers
This was done with the `ambr` search and replace tool.
ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
(...and ASSERT_NOT_REACHED => VERIFY_NOT_REACHED)
Since all of these checks are done in release builds as well,
let's rename them to VERIFY to prevent confusion, as everyone is
used to assertions being compiled out in release.
We can introduce a new ASSERT macro that is specifically for debug
checks, but I'm doing this wholesale conversion first since we've
accumulated thousands of these already, and it's not immediately
obvious which ones are suitable for ASSERT.
