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xdg-shell: fixup positioner behavior with slide and resize
if sliding and resizing, include the slide in the resize to avoid off-screen surfaces. fixes #6150
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@ -550,6 +550,14 @@ CBox CXDGPositionerRules::getPosition(const CBox& constraint, const Vector2D& pa
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return test.translate(-parentCoord - constraint.pos());
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}
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// if flips fail, we will slide and remember.
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// if the positioner is allowed to resize, then resize the slid thing.
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CBox test = predictedBox;
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// for slide and resize, defines the padding around the edge for the positioned
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// surface.
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constexpr int EDGE_PADDING = 4;
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if (state.constraintAdjustment & (XDG_POSITIONER_CONSTRAINT_ADJUSTMENT_SLIDE_X | XDG_POSITIONER_CONSTRAINT_ADJUSTMENT_SLIDE_Y)) {
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// attempt to slide
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const bool slideX = state.constraintAdjustment & XDG_POSITIONER_CONSTRAINT_ADJUSTMENT_SLIDE_X;
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@ -563,17 +571,15 @@ CBox CXDGPositionerRules::getPosition(const CBox& constraint, const Vector2D& pa
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const bool rightEdgeOut = predictedBox.x + predictedBox.w > constraint.x + constraint.w;
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const bool bottomEdgeOut = predictedBox.y + predictedBox.h > constraint.y + constraint.h;
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CBox test = predictedBox;
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// TODO: this isn't truly conformant.
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if (leftEdgeOut && slideX)
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test.x = constraint.x;
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test.x = constraint.x + EDGE_PADDING;
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if (rightEdgeOut && slideX)
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test.x = constraint.x + constraint.w - predictedBox.w;
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test.x = constraint.x + constraint.w - predictedBox.w - EDGE_PADDING;
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if (topEdgeOut && slideY)
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test.y = constraint.y;
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test.y = constraint.y + EDGE_PADDING;
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if (bottomEdgeOut && slideY)
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test.y = constraint.y + constraint.h - predictedBox.y;
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test.y = constraint.y + constraint.h - predictedBox.y - EDGE_PADDING;
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success = test.copy().expand(-1).inside(constraint);
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@ -590,21 +596,19 @@ CBox CXDGPositionerRules::getPosition(const CBox& constraint, const Vector2D& pa
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const bool rightEdgeOut = predictedBox.x + predictedBox.w > constraint.x + constraint.w;
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const bool bottomEdgeOut = predictedBox.y + predictedBox.h > constraint.y + constraint.h;
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CBox test = predictedBox;
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// TODO: this isn't truly conformant.
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if (leftEdgeOut && resizeX) {
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test.w = test.x + test.w - constraint.x;
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test.x = constraint.x;
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test.w = test.x + test.w - constraint.x - EDGE_PADDING;
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test.x = constraint.x + EDGE_PADDING;
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}
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if (rightEdgeOut && resizeX)
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test.w = -(constraint.w + constraint.x - test.w - test.x);
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test.w = -(constraint.w + constraint.x - test.w - test.x + EDGE_PADDING);
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if (topEdgeOut && resizeY) {
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test.h = test.y + test.h - constraint.y;
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test.y = constraint.y;
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test.h = test.y + test.h - constraint.y - EDGE_PADDING;
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test.y = constraint.y + EDGE_PADDING;
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}
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if (bottomEdgeOut && resizeY)
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test.h = -(constraint.h + constraint.y - test.h - test.y);
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test.h = -(constraint.h + constraint.y - test.h - test.y + EDGE_PADDING);
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success = test.copy().expand(-1).inside(constraint);
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@ -614,7 +618,7 @@ CBox CXDGPositionerRules::getPosition(const CBox& constraint, const Vector2D& pa
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LOGM(WARN, "Compositor/client bug: xdg_positioner couldn't find a place");
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return predictedBox.translate(-parentCoord - constraint.pos());
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return test.translate(-parentCoord - constraint.pos());
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}
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CXDGWMBase::CXDGWMBase(SP<CXdgWmBase> resource_) : resource(resource_) {
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