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A possibly relevant merge request was started @ https://invent.kde.org/system/dolphin/-/merge_requests/642

Git commit 4102ccb80457eea44ea280f0ace2a419602bc34b by Felix Ernst.
Committed on 07/04/2025 at 21:09.
Pushed by felixernst into branch 'master'.

Rewrite search integration

This huge commit is a nearly complete rewrite of the Dolphin search
code. It implements most of the improved Dolphin search UI/UX as
designed and discussed in a collaborative effort by Kristen McWilliam,
Jin Liu, Andy Betts, Tagwerk, a few others and me.
See https://invent.kde.org/system/dolphin/-/issues/46.

# Notable changes

- A toggle to change the search tool is provided as most contributors
deemed that useful in
https://invent.kde.org/system/dolphin/-/merge_requests/642#note_985112.
- The default search is changed to filenamesearch for maximum
reliability.
- Removing all search parameters will take users back to the view state
prior to starting a search instead of keeping the search results open.
- The UI for choosing file types or modification dates has been made
more powerful with more granularity and more options.
- Most search parameters can be configured from a popup menu which
gives us extra space for extra clarity.
- Labels and help buttons as well as hyperlinks to settings makes sure
the user always knows why some search parameters are unavailable in
some contexts.
- Chips show important search parameters while the popup is closed.
They allow quickly removing filters.
- The titles of the search and the input field placeholder message
change to make clear whether file names or file contents are searched.
- When the user actively switches the search tool, whether content
should be searched, or whether to search everywhere, this is preserved
for the initial state of the search bar when the user opens it the next
time after restarting Dolphin.

# Architecture

- The new DolphinQuery class is independent of the UI and contains all
search parameters modifiable in Dolphin as easy setters and getters.
- DolphinQuery objects are also used to update the states of every
component in the search UI. There is now a clear separation of UI and
search configuration/DolphinQuery.
- DolphinQuery is responsible for exporting to and importing from
search URLs.
- The search UI always reflects the currently configured DolphinQuery
no matter if the user changed the UI to change the DolphinQuery or
loaded a DolphinQuery/older search URL which then is reflected in the
UI.
- I tried to simplify all classes and their interaction between each
other as much as possible.
- I added some tests
Related: bug 386754, bug 446387, bug 480001, bug 483578, bug 488047, bug 488845, bug 500103, bug 435119, bug 458761, bug 471556, bug 475439, bug 477969
FIXED-IN: 25.08

M  +19   -4    src/CMakeLists.txt
M  +5    -0    src/config-dolphin.h.cmake
M  +22   -17   src/dolphinmainwindow.cpp
M  +2    -6    src/dolphinrecenttabsmenu.cpp
M  +103  -130  src/dolphinviewcontainer.cpp
M  +41   -30   src/dolphinviewcontainer.h
M  +2    -2    src/global.h
A  +356  -0    src/search/bar.cpp     [License: GPL(v2.0+)]
A  +206  -0    src/search/bar.h     [License: GPL(v2.0+)]
A  +150  -0    src/search/barsecondrowflowlayout.cpp     [License: LGPL(3+eV) LGPL(v3.0) LGPL(v2.1)]
A  +48   -0    src/search/barsecondrowflowlayout.h     [License: LGPL(3+eV) LGPL(v3.0) LGPL(v2.1)]
A  +52   -0    src/search/chip.cpp     [License: LGPL(3+eV) LGPL(v3.0) LGPL(v2.1)]
A  +101  -0    src/search/chip.h     [License: LGPL(3+eV) LGPL(v3.0) LGPL(v2.1)]
A  +0    -0    src/search/configurationpopup.h     [License: Trivial file]
M  +5    -1    src/search/dolphin_searchsettings.kcfg
D  +0    -312  src/search/dolphinfacetswidget.cpp
D  +0    -84   src/search/dolphinfacetswidget.h
M  +339  -70   src/search/dolphinquery.cpp
M  +278  -37   src/search/dolphinquery.h
D  +0    -575  src/search/dolphinsearchbox.cpp
D  +0    -189  src/search/dolphinsearchbox.h
A  +378  -0    src/search/popup.cpp     [License: LGPL(3+eV) LGPL(v3.0) LGPL(v2.1)]
A  +99   -0    src/search/popup.h     [License: LGPL(3+eV) LGPL(v3.0) LGPL(v2.1)]
A  +61   -0    src/search/selectors/dateselector.cpp     [License: LGPL(3+eV) LGPL(v3.0) LGPL(v2.1)]
A  +42   -0    src/search/selectors/dateselector.h     [License: LGPL(3+eV) LGPL(v3.0) LGPL(v2.1)]
A  +81   -0    src/search/selectors/filetypeselector.cpp     [License: LGPL(3+eV) LGPL(v3.0) LGPL(v2.1)]
A  +36   -0    src/search/selectors/filetypeselector.h     [License: LGPL(3+eV) LGPL(v3.0) LGPL(v2.1)]
A  +51   -0    src/search/selectors/minimumratingselector.cpp     [License: GPL(v2.0+)]
A  +42   -0    src/search/selectors/minimumratingselector.h     [License: LGPL(3+eV) LGPL(v3.0) LGPL(v2.1)]
A  +189  -0    src/search/selectors/tagsselector.cpp     [License: GPL(v2.0+)]
A  +45   -0    src/search/selectors/tagsselector.h     [License: GPL(v2.0+)]
A  +56   -0    src/search/updatablestateinterface.h     [License: LGPL(3+eV) LGPL(v3.0) LGPL(v2.1)]
A  +67   -0    src/search/widgetmenu.cpp     [License: LGPL(3+eV) LGPL(v3.0) LGPL(v2.1)]
A  +63   -0    src/search/widgetmenu.h     [License: LGPL(3+eV) LGPL(v3.0) LGPL(v2.1)]
M  +3    -3    src/tests/CMakeLists.txt
M  +1    -1    src/tests/dolphinmainwindowtest.cpp
M  +214  -64   src/tests/dolphinquerytest.cpp
A  +124  -0    src/tests/dolphinsearchbartest.cpp     [License: GPL(v2.0+)]
D  +0    -63   src/tests/dolphinsearchboxtest.cpp

https://invent.kde.org/system/dolphin/-/commit/4102ccb80457eea44ea280f0ace2a419602bc34b