QQuickTextDocument was anonymous before 6.7, so this is a safe change,
as it could not be referred by name before. We need to mark it as new
in 6.7, as otherwise it might clash with other names.

Pick-to: dev
Change-Id: Idf44e50978c64d7e04d7ca3886b1d8d0654ecdbe
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>

In bec8df96b7615c6ce419867254027773ea7fd6b1 we added status and removed
the translated error string. But actually it's a common pattern to have
the error string available too, so as to avoid needing to generate it
from an enum value.

Also, in the textEditStatusSwitch.qml snippet, setting textFormat is
necessary after fdbacf2d5c0a04925bcb3aecd7bf47da5fb69227

Change-Id: Ie880efa4bf347b70eb6cc4005283b1fc50e15508
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>
(cherry picked from commit d063437539d84c6c9d2a1fdde8184d19d2887395)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

Loaded/Saved is more consistent.

Change-Id: I5c773ff67198f439f3501bc338da44e5d32e3330
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>
(cherry picked from commit bdcff97afb347d813fa2be8d1c3f3c53567df197)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

If we make loading and saving asynchronous later, we'll need the same
sort of status property as in Image, Loader etc. to let the user QML
know when it's done, or when it has failed. Bindings are more flexible
than signal handlers; so we might as well have better-prepared API now.

To make use of the Status enum in QML, we need to de-anonymize
TextDocument and make it merely uncreatable. Anyway, it was already
referred to as the TextDocument type in the docs.

Change-Id: Ia4354feba77995759797030382891308b941f0af
Reviewed-by: Axel Spoerl <axel.spoerl@qt.io>
(cherry picked from commit 5647b6900b2ecc291022143176b545b933eca3a8)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

User code may already be using these names in subclasses (we don't
know). qmlcachegen can deal with shadowing now (at a performance cost).

Change-Id: Iea3e4eb0b935c1a47e17e8b0eca85d2dcc8208c8
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
(cherry picked from commit ba0816773308d3733cad0ac4a873d792a605f7ff)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

Since QTBUG-92155 is not done, we need an easy way to load and save text
into and out of a QTextDocument in QML. This patch follows the pattern
from Image and other types: add a `source` property, a URL from which
the file is to be loaded.

When it comes to saving, the pattern is not set: so far the only file
writing that has been available from QML is ItemGrabResult.saveToFile().
Since we need to save in specific formats, it makes sense to continue
that pattern: the text document knows how to do its own serialization,
so this is not suitable for generic data file I/O, even if we did have a
QML API for that. We add invokable functions save() and saveAs() for the
usual use cases in word processors and such. The URL extension
determines the file format.

Setting QQuickTextDocument's source is not allowed if the document has
unsaved changes. The user (app author) needs to call save() or override
modified to false first.

[ChangeLog][QtQuick][TextEdit] TextEdit.textDocument now has a source
property for loading files; save() and saveAs() functions for writing;
a modified property which tracks QTextDocument::modified; and an error
signal in case any of these operations fail. Setting the source
property is allowed only if the document is in unmodified state.
This API is in Tech Preview.

[ChangeLog][Controls][TextArea] TextArea.textDocument now has a source
property for loading files; save() and saveAs() functions for writing;
a modified property which tracks QTextDocument::modified; and an error
signal in case any of these operations fail. Setting the source
property is allowed only if the document is in unmodified state.
This API is in Tech Preview.

Change-Id: I687318523c7a520e02244e47224d067da55318b5
Reviewed-by: Axel Spoerl <axel.spoerl@qt.io>

Users want to be able to provide their own "special" instances of
QTextDocument, or custom subclasses. But so far we allow this only
from C++, not from QML.

QQuickTextDocument is created lazily in QQuickTextEdit::textDocument()
so it's not possible to rely on it to hold the actual QTextDocument all
the time. It's only a facade provided to the user. But QQuickTextEdit
holds the QTextDocument, and is the only class that creates
QQuickTextDocument, and sets the parent to itself; so QQuickTextDocument
can rely on accessing the TextEdit's document rather than maintaining
its own pointer.

textEdit.dot is basically a collaboration diagram showing which objects
creates which, the parents, and which objects get swapped out if the
user calls setTextDocument().

Task-number: QTBUG-35688
Change-Id: Iac5000aa8027a75a000d4501190f3ee5f04e426e
Reviewed-by: Axel Spoerl <axel.spoerl@qt.io>
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>

They are generally not useful for anything.

Change-Id: I12e959ce9338e6eb7465633496c7921fa09a3fe8
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>

Replace the current license disclaimer in files by
a SPDX-License-Identifier.
Files that have to be modified by hand are modified.
License files are organized under LICENSES directory.

Pick-to: 6.4
Task-number: QTBUG-67283
Change-Id: I63563bbeb6f60f89d2c99660400dca7fab78a294
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>

Change-Id: Id72fbe10c16de61bd847773d0055d83cfe03f63c
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>