fix(reader): close FindWidget on tab switch to prevent cross-document…

[GongHeng2017]

… search

When switching between document tabs, the FindWidget (whose parent is the MainWindow, not the SheetBrowser) remained visible with its m_docSheet pointer still bound to the previous document. Searching from this stale widget executed the search on the wrong document.

Add SheetBrowser::hideFindWidget() to hide and destroy the FindWidget, DocSheet::closeFindWidget() to stop the search and hide the widget, and call prevSheet->closeFindWidget() in CentralDocPage::onTabChanged() before switching to the new tab.

Log: fix issue
Bug: https://pms.uniontech.com/bug-view-376317.html

Summary by Sourcery

Prevent cross-document searches by closing the previous document's search widget before activating a new tab.

Bug Fixes:

• Close and destroy the active document's FindWidget when switching tabs to prevent searches from being executed against the previously selected document.

Enhancements:

• Centralize FindWidget shutdown by stopping its search before removing the widget during document transitions.

[sourcery-ai]

Reviewer's Guide

Fix cross-document search after tab switches by stopping the previous sheet’s search and hiding/deleting its FindWidget before activating the new document, with explicit cleanup APIs and updated copyright metadata.

Sequence diagram for closing search on document tab switch

sequenceDiagram
    participant CentralDocPage
    participant PreviousDocSheet
    participant PreviousSheetBrowser
    participant NewDocSheet

    CentralDocPage->>PreviousDocSheet: closeFindWidget()
    PreviousDocSheet->>PreviousDocSheet: stopSearch()
    PreviousDocSheet->>PreviousSheetBrowser: hideFindWidget()
    PreviousSheetBrowser->>PreviousSheetBrowser: hide()
    PreviousSheetBrowser->>PreviousSheetBrowser: deleteLater()
    CentralDocPage->>CentralDocPage: setCurrentWidget(NewDocSheet)
    CentralDocPage->>NewDocSheet: defaultFocus()

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File-Level Changes

Change	Details	Files
Ensure document-tab switches terminate any search UI and state associated with the previous document.	Detect the currently displayed sheet before changing the stacked widget. Close the previous sheet’s find widget only when switching to a different opened sheet. Stop its active search before removing the widget.	reader/uiframe/CentralDocPage.cpp reader/uiframe/DocSheet.cpp reader/uiframe/DocSheet.h
Add lifecycle management for the FindWidget owned through the sheet browser.	Introduce a helper that hides and schedules deletion of the FindWidget. Clear the widget pointer after scheduling deletion. Expose the helper for DocSheet shutdown handling.	reader/browser/SheetBrowser.cpp reader/browser/SheetBrowser.h
Update copyright metadata in all touched source and header files.	Replace legacy copyright lines with the 2019–2026 SPDX copyright declaration.	reader/browser/SheetBrowser.cpp reader/browser/SheetBrowser.h reader/uiframe/CentralDocPage.cpp reader/uiframe/DocSheet.cpp reader/uiframe/DocSheet.h

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[sourcery-ai]

Hey - I've reviewed your changes and they look great!

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[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: GongHeng2017, max-lvs

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[GongHeng2017]

/merge