Bug 89226 – [GTK] Get rid of DumpRenderTreeSupportGtk::{in|de}crementAccessibilityValue

• Component: WebKitGTK
• Status: RESOLVED FIXED

[Mario Sanchez Prada]

Currentĺy, in order to unskip tests like accessibility/input-slider.html in WKGTK, we have this helper functions in DumpRenderTreeSupportGtk, since there's no equivalent function available in ATK API.

However, it should be possible to implement them in DRT without needing this helper functions, just by using functions defined in the AtkValue interface:

   atk_value_get_current_value()
   atk_value_get_minimum_increment()
   atk_value_set_current_value()

Besides allowing to remove unnecesary code from DumpRenderTreeSupportGtk, this change will be useful too for implementing the same functions in WebKitTestRunner, where we will have the same situation. Thus, blocking bug 89223 for this reason

[Mario Sanchez Prada]

Created attachment 147841 [details]
Patch proposal

No layout test needed, as the test for this is that tests like accessibility/input-slider.html keep working, as well as that tests in WK2 (when enabled) will run properly too.

[Martin Robinson]

Comment on attachment 147841 [details]
Patch proposal

View in context: https://bugs.webkit.org/attachment.cgi?id=147841&action=review

> Source/WebCore/accessibility/gtk/WebKitAccessibleInterfaceValue.cpp:78
> +    double minValue = coreObject->minValueForRange();
> +    newValue = newValue < minValue ? minValue : newValue;
> +
> +    double maxValue = coreObject->maxValueForRange();
> +    newValue = newValue > maxValue ? maxValue : newValue;

This can simply be: 
newValue = std::max(coreObject->minValueForRange(), newValue);
newValue = std::min(coreObject->maxValueForRange(), newValue);

> Tools/DumpRenderTree/gtk/AccessibilityUIElementGtk.cpp:649
> +static void alterCurrentValue(PlatformUIElement element, bool isIncrement)

Instead of a boolean it would make sense to either pass a sign value ala alterCurrentValue(element, -1) and  alterCurrentValue(element, 1) or create an enum AlterCurrentValueOperation { Increment, Decrement };

The nice thing about the sign approach is that below you can just write:

double newDoubleValue = g_value_get_double(&currentValue) + (sign * g_value_get_double(&increment));

[Mario Sanchez Prada]

Committed r120588: <http://trac.webkit.org/changeset/120588>