If an invalid character is inserted into the text, such as a "^L" (ASCII 0x0C)
when copy-pasting from a google document that has a page break in it, a crash
will happen as the character cannot be inserted into XML. This patch removes
those invalid characters from the text so the revisions.xml can be saved.
Fixes#562
Describing all the rabbitholes that I and kakaroto have gone through
while debugging this one until dawn can frankly not do enough justice to
the crazy amount of rubberducking that went on while trying to fix this.
This bug would be triggered whenever you had a document open in the
editor and then moved an ancestor object downwards (visually) in the tree.
Or when you simply deleted the ancestor. Depending on the exact method
that caused the opened item to be removed from the internal model, the
exact nature of the bug would vary, which means this commit fixes a few
different bits of code that lead to what appears to be the same bug.
In order of appearance, the bugs that ruined our sleep were:
1) The editor widget was trying to handle the removed item at too late a
stage.
2) The editor widget tried to fix its view after a move by searching for
the new item with the same ID, but in the case of moving an object down
it came across its own old item, ruining the attempt.
3) The editor widget did not properly account for the hierarchical
nature of the model.
Upon fixing these the next day, it was revealed that:
4) The outlineItem.updateWordCount(emit=False) flag is broken. This
function would call setData() in several spots which would still cause
emits to bubble through the system despite emit=False, and we simply got
lucky that it stopped enough of them until now.
This last one was caused by a small mistake in the fixes for the first
three bugs, but it has led to a couple of extra changes to make any
future bug hunts slightly less arduous and frustrating:
a) When calling item.removeChild(c), it now resets the associated parent
and model to mirror item.insertChild(c). This has also led to an extra
check in model.parent() to check for its validity.
b) The outlineItem.updateWordCount(emit=) flag has been removed entirely
and it now emits away with reckless abandon. I have been unable to
reproduce the crashes the code warned about, so I consider this a code
quality fix to prevent mysterious future issues where things sometimes
do not properly update right.
Worthy of note is that the original code clearly showed the intention to
close tabs for items that were removed. Reworking the editor to support
closing a tab is unfortunately way out of scope, so this intention was
left in and the new fix was structured to make it trivial to implement
such a change when the time comes. An existing FIXME regarding unrelated
buggy editor behaviour was left in, too.
Many thanks to Kakaroto for burning the midnight oil with me to get to
the bottom of this. (I learned a lot that night!)
Issues #479, #516 and #559 are fixed by this commit. And maybe some others,
too.
This makes the fullscreen editor much more powerful in terms of navigating
through chapters and scenes. This should make issue #234 users happy and
fix#444.
Top panel now has left/right arrows to navigate through the scenes. It will
automatically find the next/previous text item and display it, navigating through
the outline tree.
There's also a "New document" icon which will create a new text entry immediately
after the current one and switch to it.
Navigation can also be done using Alt+Page-Up, Alt+Page-Down or Alt+Left and Alt+right
shortcuts (Fixing #444).
There's now also the option between Title or Path for the top panel, if Path is chosen
then the full path of the scene is displayed and clicking on the scene or parent items
opens a menu to quickly switch to the selected chapter/scene. Selecting a folder will
automatically display the first text entry available in that folder.
