f54044d4a9
In a text line that has a change of direction at either end of the text, the cursor needs to be positioned where the next character is inserted, or where backspace deletes the previous character. In bidi text, this is ambiguous as illustrated by this example: abcشزذ Depending on whether this string was typed in a left-to-right document or in a right-to-left document, it could be first latin, then arabic; or it could be first arabic, then latin. If a general left-to-right context, cursor position 0 should be in front of the 'a', and cursor position 6 should be at the end of the arabic text, in the visual middle of the line. Cursor position 3 can be either after the 'c' if the next character typed would be latin, or at the visual end of the line if the next character will be arabic. Qt calculated the cursor position past the right end of the text as 3 (which is not wrong, but 3 has two visual positions), and placed the cursor at the visual end of the line (favoring the right-to-left alternative). Backspace would then delete the 'c', writing a new latin character would insert a 'd' next to the 'c', writing a new arabic character would insert it also in the middle - none of these operations happen at the visual end of the line, where the cursor was blinking. To fix this, we take into account the general layout of the text, which is typically based on the document, or the user's locale setting and UI translation, and calculate the cursor position accordingly: if we are past the visual end of the document on either side, then the cursor position is either 0 or the last character of the text, depending on the direction of the QTextEngine used. This way, the cursor ends up in the middle of the document when we click beyond the end of the line, which is where characters are removed and inserted. Typing a 'd' at this point will make the cursor jump to the end, where the d is added. There are still corner cases: clicking on the right-most arabic character calculates the cursor position as 3, which is then ambiguous, as it can be either at the visual end of the string, or next to the 'c'. َQt makes the inconsistent choice to place the cursor at the visual end, showing the left-to-right indicator, but pressing a 'd' adds the 'd' after the 'c' in the middle of the text. Fixes: QTBUG-88529 Pick-to: 6.2 Change-Id: Idccd4c4deead2bce0e858189f9aef414857eb8af Reviewed-by: Lars Knoll <lars.knoll@qt.io> |
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| .. | ||
| auto | ||
| baselineserver | ||
| benchmarks | ||
| global | ||
| libfuzzer | ||
| manual | ||
| shared | ||
| testserver | ||
| CMakeLists.txt | ||
| README | ||
This directory contains autotests and benchmarks based on Qt Test. In order
to run the autotests reliably, you need to configure a desktop to match the
test environment that these tests are written for.
Linux X11:
* The user must be logged in to an active desktop; you can't run the
autotests without a valid DISPLAY that allows X11 connections.
* The tests are run against a KDE3 or KDE4 desktop.
* Window manager uses "click to focus", and not "focus follows mouse". Many
tests move the mouse cursor around and expect this to not affect focus
and activation.
* Disable "click to activate", i.e., when a window is opened, the window
manager should automatically activate it (give it input focus) and not
wait for the user to click the window.