Bug 52385 – [GTK] Move progress bar painting out of gtk2drawing.c

• Component: WebKitGTK
• Status: RESOLVED FIXED

[Martin Robinson]

This bug tracks removing the progress bar rendering out of gtk2drawing.c and sharing some animation code between the GTK+ 2.x and GTK+ 3.x port.

[Martin Robinson]

Created attachment 79324 [details]
Patch

[Daniel Bates]

Comment on attachment 79324 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=79324&action=review

This won't compile when PROGRESS_TAG is disabled/undefined since calculateProgressRect() is only declared in RenderThemeGtk.h when PROGRESS_TAG is defined.

> Source/WebCore/platform/gtk/RenderThemeGtk.cpp:565
> +void RenderThemeGtk::calculateProgressRect(RenderObject* renderObject, IntRect& rect)

Given the name of this function, it seems a bit weird that this function adjusts the rectangle of the progress bar instead of returning a rectangle.

> Source/WebCore/platform/gtk/RenderThemeGtk.cpp:577
> +    int newWidth = max(2, rect.width() / progressActivityBlocks);

Where does the 2 come from?

> Source/WebCore/platform/gtk/RenderThemeGtk.cpp:581
> +        rect.setX(rect.x() + (animationProgress * 2 * movableWidth));

Where does the 2 come from? The parentheses are not needed for the second addend since multiplication has a higher precedence that addition.

> Source/WebCore/platform/gtk/RenderThemeGtk.cpp:583
> +        rect.setX(rect.x() + ((1.0 - animationProgress) * 2 * movableWidth));

Ditto.

[Daniel Bates]

(In reply to comment #2)
> (From update of attachment 79324 [details])
> View in context: https://bugs.webkit.org/attachment.cgi?id=79324&action=review
> 
> This won't compile when PROGRESS_TAG is disabled/undefined since calculateProgressRect() is only declared in RenderThemeGtk.h when PROGRESS_TAG is defined.

Disregard this comment. Additional context reveals that RenderThemeGtk::calculateProgressRect() is enclosed within an ENABLE(PROGRESS_TAG).

[Daniel Bates]

Comment on attachment 79324 [details]
Patch

This patch look sane to me. I am curious about where the 2's come from in lines 576 thru 583 in RenderThemeGtk.cpp.

[Carlos Garcia Campos]

Comment on attachment 79324 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=79324&action=review

> Source/WebCore/platform/gtk/RenderThemeGtk2.cpp:491
> +        widgetContext.gtkPaintBox(progressRect, widget, GTK_STATE_NORMAL, GTK_SHADOW_IN, "bar");

This should be GTK_STATE_PRELIGHT, GTK_SHADOW_OUT

[Martin Robinson]

Created attachment 79447 [details]
Patch with extra comments and Carlos' fix

[Martin Robinson]

Committed r76192: <http://trac.webkit.org/changeset/76192>