зеркало из https://github.com/mozilla/gecko-dev.git
87ca855ece
`synthesizePlainDragAndDrop()` synthesizes drag events with `DataTransfer` object which is set to `DragEvent.dataTransfer` of `dragstart` after starting drag session explicitly. However, this causes `EventStateManager::DoDefaltDragStart()` does not initialize `nsIDragService` instance. Therefore, synthesized drag events cannot work with editor because `DragEvent::GetMozSourceNode()` returns `nullptr` due to `nsIDragSession::GetSourceNode()` returning `nullptr`. On the other hand, synthesized drag events cannot use `nsIDragService::InvodeDragSession()` normally because of hitting an assertion. https://searchfox.org/mozilla-central/rev/690e903ef689a4eca335b96bd903580394864a1c/widget/nsBaseDragService.cpp#230-233 This patch does: - mark drag events caused by synthesized mouse events as "synthesized for tests" - make `synthesizePlainDragAndDrop()` stop using `nsIDragService.startDragSession()` - make `nsBaseDragService` initialize and start session even for synthesized `dragstart` event - make `synthesizePlainDragAndDrop()` stop synthesizing drag events with `DataTransfer` object since it's normal behavior and it'll be initialized with `nsIDragService::GetDataTransfer()` - make `nsBaseDragService` store `effectAllowed` for the session only when it's synthesized session because it's required at initializing synthesized default `dropEffect` value of `dragenter`, `dragover`, `dragexit` and `drop` events' `dataTransfer` - make all tests which use `nsIDragService.startDragSession()` use new API, `nsIDragService.startDragSessionForTests()` to initialize session's `effectAllowed` value - make `EventStateManager::PostHandleEvent()` set drag end point of the test session to `eDrop` event's screen point - make `synthesizePlainDragAndDrop()` set drag end point of the session if it does not synthesize `drop` event because following `endDragSession()` use it at dispatching `dragend` event on the source element Additionally, this adds `dumpFunc` new param to `synthesizePlainDragAndDrop()` because it's really useful to investigate the reason why requesting DnD isn't performed as expected. Differential Revision: https://phabricator.services.mozilla.com/D57425 --HG-- extra : moz-landing-system : lando |
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