Browser Gesture Zoom Recognition via DOM Element Detection

The patent applies different gesture recognition rules to different regions of the web page. Specifically, it identifies canvas elements (gaming regions) and text regions, then applies localized policies: disabling zoom gestures in canvas regions to prevent interference with game operations, disabling zoom in text regions to avoid unnecessary re-layout operations, and enabling zoom only in appropriate non-text, non-canvas regions. This local differentiation resolves the contradiction by making zoom functionality adaptive to regional requirements.

The patent introduces an intermediary layer (the gesture recognition system) that sits between user input and web page response. This intermediary analyzes the context of each gesture by identifying the underlying HTML element (canvas vs. other elements) and mediates the gesture interpretation accordingly. For canvas elements, it prevents zoom gesture recognition, allowing game taps to pass through unchanged. For other elements, it enables normal zoom recognition. This intermediary mechanism resolves the contradiction by intelligently filtering gestures based on contextual information.

The patent applies preliminary anti-action by proactively preventing zoom operations in text regions before they can trigger harmful re-layout effects. The system identifies text regions (through element type detection or sampling surrounding elements) and blocks zoom gestures targeting these regions. This preemptive measure avoids the subsequent chain of harmful operations (re-layout, re-drawing, coordinate adjustment) that would cause vision disturbance and performance overhead, while still allowing zoom in appropriate regions where it is beneficial.