The recent update that made importing patterns undoable had the side
effect of undoing tab changes as well. When working on a fix for that it
became clear that the undo/redo stacks were being shared by all
providers so that you could undo changes done in a separate file. The
problem was fixed by making the text editors (and the console editors as
well) to be per provider which gives better control on things like
breakpoints and selections and a more robust focusing system that
preserves the cursor positions and removes the need to click on a
pattern to start editing. There are a lot of changes, but they are
mostly all the uses of text editors being now coded differently to
manage the providers. File imports are still undoable, but switching
providers is not.
Further changes suggested by reviewer were implemented namely a mull provider was being used and there was a get function missing which prevented the use of the preferred syntax.
The recent changes to the text editor to fix the longest line length
problems broke the console horizontal scrollbar. The code that displays
the console editor was more complicated that it needed be, and it had
the bad side effect of resetting the cursor which prevented horizontal
scrolling. Adding a function that appends lines to the text editor fixes
all problems and makes the code clearer. To accommodate for strings
containing zeros, the code that inserts text was changed to print a '.'
when zeros are encountered thus keeping the line length the same.
Proof of concept for implementing subpixel processing in ImGui. This is
work in progress, and it is bound to have problems.
What it does:
1) Uses freetype own subpixel processing implementation to build a
32-bit color atlas for the default font only (no icons, no unifont) . 2)
Avoids pixel perfect font conversion when possible. 3) Self contained,
no ImGui source code changes.
4) Results in much improved legibility of fonts rendered on low dpi LCD
screens that use horizontal RGB pixel layouts (no BRG or OLED or CRT if
they even exist anymore)
What it doesn't:
1) Fancy class based interface. The code is barely the minimum needed to
show it can work. 2) Dual source color blending. That needs to be
implemented in shader code, so it needs to change ImGui source code
although minimally. This will result in some characters appearing dimmer
than others. Easily fixed with small fragment and vertex shaders. 3)
subpixel positioning. If characters are very thin they will look
colored, or they can be moved to improve legibility. 4) deal with
detection of fringe cases including rare pixel layouts, non LCD screens,
Mac-OS not handling subpixel rendering and any other deviation from the
standard LCD. 5) tries to be efficient in speed or memory use. Font
Atlases will be 4 times the size they were before, but there are no
noticeable delays in font loading in the examples I have tried.
Any comments and code improvements are welcome.
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Co-authored-by: Nik <werwolv98@gmail.com>
The horizontal scroll bar length is set using the maximum line length across the input file. The original setup had the lengths of imported and included files added so changes are made to insure that only changes from the input file are taken. This required changes to the Pattern Language library so the library is updated to the latest version as well.
The function SetSelection() in the text editor is used as its name implies to set the part of text that will be shown highlighted as a selection. It has two parameter for the selection start and end.
Strangely it also uses a third argument to choose one of 3 selection modes (line, word and normal). This is strange because it seems that if one wanted to select a line one would simply choose the line start and end as the selection values.
Furthermore using selection mode creates a bug when the word boundaries are advanced twice during a single word left or right selection and a second bug when SetSelection is used to set the cursor when the window acquires focus breaking selections in the console editor.
This PR simply eliminates the extraneous argument to SetSelection() ensuring that any problems related to it are fixed once and for all improving code readability by removing the use of inconsistent argument values to cover for the functionality duplication design flaw.
### Problem description
This PR addresses two small issues regarding the cursor in the pattern
editor (TextEditor.cpp):
1. It was not possible to move the cursor to the start of a line, if it
contained leading white space characters. With my fix, the editor will
behave more like other code editors. Pressing Home once will jump to the
first non-whitespace character (as it did before), but pressing it again
will jump to column 0. Subsequent presses will alternate between the two
positions.
2. When expanding a selection with Ctrl+Shift+{Left/Right}, the new
selection position would skip an additional word, resulting in the
cursor landing "inside" the selection. This PR fixes this bug.
### Implementation description
1. To fix the first issue, I simply added a condition in
`TextEditor::MoveHome` to check if the cursor is already on the first
meaningful character, or on one of the whitespaces preceding it, in
which case the jump offset is set to 0. If we're already on column 0,
then jump forwards to the first non-whitespace character.
2. This bug was happening because the word boundary jump calculations
were essentially happening twice. Once in
`TextEditor::MoveLeft`/`TextEditor::MoveRight`, and then a second time
in `TextEditor::SetSelection`, leading to the selection skipping an
additional word. I fixed this by replacing the ternary operator with
just `SelectionMode::Normal`.
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Co-authored-by: paxcut <53811119+paxcut@users.noreply.github.com>
fixes Issue #1621.
Using shift-tab on an empty line caused a crash. Additionally, changed
the hard coded value of 4 to the tab size variable it really needs to be.
