Duplicate code in TermControl.cpp #11586
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Area-CodeHealth
Issues related to code cleanliness, linting, rules, warnings, errors, static analysis, etc.
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It's a feature request, but it doesn't really need a major design.
Product-Terminal
The new Windows Terminal.
Resolution-Fix-Committed
Fix is checked in, but it might be 3-4 weeks until a release.
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ghost
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I think I already got rid of this code in the branch I'm working on this 😋 But I'll leave it open to make sure. |
zadjii-msft
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Just double checked this, yep, I've got this fixed. I'll include this one in the PR. |
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Dec 1, 2021
## Summary of the Pull Request Currently, the TermControl and ControlCore recieve a settings object that implements `IControlSettings`. They use for this for both reading the settings they should use, and also storing some runtime overrides to those settings (namely, `Opacity`). The object they recieve currently is a `T.S.M.TerminalSettings` object, as well as another `TerminalSettings` object if the user wants to have an `unfocusedAppearance`. All these are all hosted in the same process, so everything is fine and dandy. With the upcoming move to having the Terminal split into multiple processes, this will no longer work. If the `ControlCore` in the Content Process is given a pointer to a `TerminalSettings` in a certain Window Process, and that control is subsequently moved to another window, then there's no guarantee that the original `TerminalSettings` object continues to exist. In this scenario, when window 1 is closed, now the Core is unable to read any settings, because the process that owned that object no longer exists. The solution to this issue is to have the `ControlCore`'s own their own copy of the settings they were created with. that way, they can be confident those settings will always exist. Enter `ControlSettings`, a dumb struct for just storing all the contents of the Settings. I used x-macros for this, so that we don't need to copy-paste into this file every time we add a setting. Changing this has all sorts of other fallout effects: * Previewing a scheme/anything is a tad bit more annoying. Before, we could just sneak the previewed scheme into a `TerminalSettings` that lived between the settings we created the control with, and the settings they were actually using, and it would _just work_. Even explaining that here, it sounds like magic, because it was. However, now, the TermControl can't use a layered `TerminalSettings` for the settings anymore. Now we need to actually read out the current color table, and set the whole scheme when we change it. So now there's also a `Microsoft.Terminal.Core.Scheme` _struct_ for holding that data. - Why a `struct`? Because that will go across the process boundary as a blob, rather than as a pointer to an object in the other process. That way we can transit the whole struct from window to core safely. * A TermControl doesn't have a `IControlSettings` at all anymore - it initalizes itself via the settings in the `Core`. This will be useful for tear-out, when we need to have the `TermControl` initialize itself from just a `ControlCore`, without being able to rebuild the settings from scratch. * The `TabTests` that were written under the assumption that the Control had a layered `TerminalSettings` obviously broke, as they were designed to. They've been modified to reflect the new reality. * When we initialize the Control, we give it the settings and the `UnfocusedAppearance` all at once. If we don't give it an `unfocusedAppearance`, it will just use the focused appearance as the unfocused appearance. * The Control no longer can _write_ settings to the `ControlSettings`. We don't want to be storing things in there. Pretty much everything we set in the control, we store somewhere other than in the settings object itself. However, `opacity` and `useAcrylic`, we need to store in a handy new `RUNTIME_SETTING` property. We can write those runtime overrides to those properties. * We no longer store the color scheme for a pane in the persisted state. I'm tracking that in #9800. I don't think it's too hard to add back, but I wanted this in front of eyes sooner than later. ## References * #1256 * #5000 * #9794 has the scheme previewing in it. * #9818 is WAY more possible now. ## PR Checklist * [x] Surprisingly there wasn't ever a card or issue for this one. This was only ever a bullet point in #5000. * A bunch of these issues were fixed along the way, though I never intended to fix them: * [x] Closes #11571 * [x] Closes #11586 * [x] Closes #7219 * [x] Closes #11067 * [x] I think #11623 actually ended up resolving this one, but I'm double tapping on it here: Closes #5703 * [x] I work here * [x] Tests added/passed * [n/a] Requires documentation to be updated ## Detailed Description of the Pull Request / Additional comments Along the way I tried to clean up code where possible, but not too agressively. I didn't end up converting the various `MockTerminalSettings` classes used in tests to the x macros quite yet. I wanted to merge this with #11416 in `main` before I went too crazy. ## Validation Steps Performed * [x] Scheme previewing works * [x] Adjusting the font size works * [x] focused/unfocused appearances still work * [x] mouse-wheeling opacity still works * [x] acrylic & cleartype still does the right thing * [x] saving the settings still works * [x] going wild on sliding the opacity slider in the settings doesn't crash the terminal * [x] toggling retro effects with a keybinding still works * [x] toggling retro effects with the command palette works * [x] The matrix of (`useAcrylic(true,false)`)x(`opacity(50,100)`)x(`antialiasingMode(cleartype, grayscale)`) works as expected. Slightly changed, falls back to grayscale more often, but looks more right.
ghost
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Resolution-Fix-Committed
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🎉This issue was addressed in #11619, which has now been successfully released as Handy links: |
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While reading code in TermControl.cpp i stumble upon two lines of code that are absolutely the same and are called one after another.
terminal/src/cascadia/TerminalControl/TermControl.cpp
Lines 333 to 334 in 670ae2b
terminal/src/cascadia/TerminalControl/TermControl.cpp
Lines 380 to 381 in 670ae2b
They are both called from
TermControl::UpdateSettings()_UpdateSettingsFromUIThread->_ApplyUISettingsand_UpdateAppearanceFromUIThreadNot sure if this is because of the situations in which this functions might be called separately but this just looks weird
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