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This is an automatically generated e-mail. To reply, visit:
<a href="https://git.reviewboard.kde.org/r/124426/">https://git.reviewboard.kde.org/r/124426/</a>
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<p style="margin-top: 0;">On July 24th, 2015, 10:15 a.m. UTC, <b>Milian Wolff</b> wrote:</p>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">I find the control flow really hard to follow. In the context menu extension, add a QMenu and then start some task via e.g. ThreadWeaver and push actions into the action when they are still valid or stop the action (if possible) if the menu gets destroyed. Could you try to clean it up?</p></pre>
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<p>On July 24th, 2015, 1:48 p.m. UTC, <b>Maciej Poleski</b> wrote:</p>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">It is probebly unclear that this feature is (going to be) composition of two mechanisms:
1) Background worker thread. ClangTool should run in another thread not to block GUI. It is forbidden to run more than one ClangTool concurrently (refactoring during refactoring) thus we need exactly one thread bounded to RefactoringContext (RefactoringContext is basically a source of informations for Clang tools)
2) Logic to populate context menu (in background)</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">First bits of this code was making no separation between these (even current name of thread is "RefactoringManager - Worker", but should be "RefactoringContext - Worker"). Worker was part of RefactoringManager used to move CPU intensive task to background. But basically the same problem is with concreate reafctoring actions, requirements are also the same. Thus I decided to move this worker to more general object - RefactoringContext - because more or less all actions are performed on behalf of this object. It is going to be used also to background refactoring.</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">Control flow is a bit complicated because in Qt we can modify GUI only from main (GUI) thread (i find this limitation a reasonable one). That's why there is a few <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">QMetaObject::invoke</code> calls.</p></pre>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">You can also use signals and slots, i.e. emit a signal from one thread and have it connected to a slot in another thread. That will safe you the manual invoke calls, and hopefully make things simpler to follow around.</p></pre>
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<p style="margin-top: 0;">On July 24th, 2015, 10:15 a.m. UTC, <b>Milian Wolff</b> wrote:</p>
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<a href="https://git.reviewboard.kde.org/r/124426/diff/2/?file=387052#file387052line58" style="color: black; font-weight: bold; text-decoration: underline;">refactoring/contextmenumutator.h</a>
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(Diff revision 2)
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">QAction</span> <span class="o">*</span><span class="n">m_placeholder</span><span class="p">;</span></pre></td>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">why not use a QMenu here, and store it in a QPointer, then check that for validity and then add to that menu?</p></pre>
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<p>On July 24th, 2015, 1:48 p.m. UTC, <b>Maciej Poleski</b> wrote:</p>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;"><code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">QWidget::addAction</code> family of functions <em style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: normal;">does not</em> change parent of action. Any action provided in <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">ContextMenuExtension</code> have some other parent. If I add QAction/QMenu "here" (like placeholder) it is not going to be destroyed when menu is destroyed.
What is more KDevPlatform handles creation of submenu automatically if there is more than one action in group (and there is a "refactoring" group already). If I add QMenu here, we may (and in current implementation of the whole kdev-clang always will) get additional indirection in this menu (Refactoring->Refactoring-><em style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: normal;">my_refactoring_action</em>). Even more. I detected that sometimes placeholder action is added to more than one menu (it is exactly the case when both classic kdev-clang and refactorings part both give empty refactorings list, the second menu has a name and it is something with "k", "popup" and "menu" (i don't remember exactly)). Design of <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">ContextMenuExtension</code> and fact that <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">QWidget::addAction</code> doesn't reparent actions allows this behavior.</p></pre>
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<pre style="margin-left: 1em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">fair enough.</p></pre>
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<p style="margin-top: 0;">On July 24th, 2015, 10:15 a.m. UTC, <b>Milian Wolff</b> wrote:</p>
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<a href="https://git.reviewboard.kde.org/r/124426/diff/2/?file=387053#file387053line55" style="color: black; font-weight: bold; text-decoration: underline;">refactoring/contextmenumutator.cpp</a>
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(Diff revision 2)
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">QMenu</span> <span class="o">*</span><span class="k">const</span> <span class="n">menu</span> <span class="o">=</span> <span class="k">dynamic_cast</span><span class="o"><</span><span class="n">QMenu</span> <span class="o">*></span><span class="p">(</span><span class="n">widget</span><span class="p">);</span></pre></td>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">style: const before typename</p></pre>
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<p>On July 24th, 2015, 1:48 p.m. UTC, <b>Maciej Poleski</b> wrote:</p>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">this is const pointer, not pointer to const</p></pre>
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<pre style="margin-left: 1em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">ups, sorry! add space please between <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">* const</code></p></pre>
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<p style="margin-top: 0;">On July 24th, 2015, 10:15 a.m. UTC, <b>Milian Wolff</b> wrote:</p>
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<a href="https://git.reviewboard.kde.org/r/124426/diff/2/?file=387064#file387064line29" style="color: black; font-weight: bold; text-decoration: underline;">refactoring/refactoringcontext_worker.cpp</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="o">:</span> <span class="n">QThread</span><span class="p">(</span><span class="k">nullptr</span><span class="p">)</span></pre></td>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">I'd urge you to use threadweaver instead of using raw QThread</p></pre>
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<p>On July 24th, 2015, 1:48 p.m. UTC, <b>Maciej Poleski</b> wrote:</p>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">I started reading documentation of ThreadWeaver. At this point I can't settle if this framework can be (reasonably easy) used here.</p></pre>
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<pre style="margin-left: 1em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">you mentioned above you need at most one thread running these actions, so yes - maybe threadweaver is not the right option. but do try to use signals/slots instead which hopefully allows to cleanup the code a bit.</p></pre>
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<p>- Milian</p>
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<p>On July 23rd, 2015, 1:53 p.m. UTC, Maciej Poleski wrote:</p>
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<div>Review request for KDevelop.</div>
<div>By Maciej Poleski.</div>
<p style="color: grey;"><i>Updated July 23, 2015, 1:53 p.m.</i></p>
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<b style="color: #575012; font-size: 10pt;">Repository: </b>
kdev-clang
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
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<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">Introduced worker thread for time-consuming Clang actions.</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">Moved populating of context menu (list of applicable refactorings) to background.</p></pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing </h1>
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<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">Manual testing</p></pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<li>refactoring/CMakeLists.txt <span style="color: grey">(PRE-CREATION)</span></li>
<li>refactoring/contextmenumutator.h <span style="color: grey">(PRE-CREATION)</span></li>
<li>refactoring/contextmenumutator.cpp <span style="color: grey">(PRE-CREATION)</span></li>
<li>refactoring/encapsulatefieldrefactoring.cpp <span style="color: grey">(PRE-CREATION)</span></li>
<li>refactoring/interface.h <span style="color: grey">(PRE-CREATION)</span></li>
<li>refactoring/interface.cpp <span style="color: grey">(PRE-CREATION)</span></li>
<li>refactoring/kdevrefactorings.h <span style="color: grey">(PRE-CREATION)</span></li>
<li>refactoring/kdevrefactorings.cpp <span style="color: grey">(PRE-CREATION)</span></li>
<li>refactoring/qactionwatcher.h <span style="color: grey">(PRE-CREATION)</span></li>
<li>refactoring/qactionwatcher.cpp <span style="color: grey">(PRE-CREATION)</span></li>
<li>refactoring/refactoringcontext.h <span style="color: grey">(PRE-CREATION)</span></li>
<li>refactoring/refactoringcontext.cpp <span style="color: grey">(PRE-CREATION)</span></li>
<li>refactoring/refactoringcontext_worker.h <span style="color: grey">(PRE-CREATION)</span></li>
<li>refactoring/refactoringcontext_worker.cpp <span style="color: grey">(PRE-CREATION)</span></li>
<li>refactoring/refactoringmanager.h <span style="color: grey">(PRE-CREATION)</span></li>
<li>refactoring/refactoringmanager.cpp <span style="color: grey">(PRE-CREATION)</span></li>
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<p><a href="https://git.reviewboard.kde.org/r/124426/diff/" style="margin-left: 3em;">View Diff</a></p>
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