Apple Inc.

Derek B Clegg

Philip Andrew Mansfield, Iii

Michael Robert Levy

Haroon S Sheikh

Philip Mansfield

Some embodiments provide a method for displaying a structured document that includes a hierarchy of structural elements. The hierarchy is constructed by analyzing an unstructured document. The method displays the structured document on a device. The method receives a selection of a position of interest in the document. Based on the position of interest, the method identifies a structural element within the hierarchy as a region of interest. The method modifies the display of the document to highlight the identified region of interest.

Identification, selection, and display of a region of interest in a document

For a document with content that has been structured into a set primitive areas, a novel method for performing contiguous selection of document content across different primitive areas in the document is disclosed. The method defines a contiguous section in the ordered list by identifying the first and last primitive elements of the contiguous selection. The first primitive element is identified as the primitive element that is closest in reading flow to a start selection point on the page, while the last primitive element is identified as the primitive element that is closest in reading flow to an end selection point on the page.

Identifying a selection of content in a structured document

For a page that has been decomposed into a set of primitive areas, a novel method for organizing the set of primitive areas into an ordered list is disclosed. The primitive areas in the ordered list are initially sorted using start point order relation ordering, which compares the start points of the primitive areas in the coordinate system of the page. The ordering of the primitive areas in the ordered list are then refined by using contextual order relation ordering, which compares primitive areas against each other according to coordinate systems local to the primitive areas being compared. A new ordered list is then created by transposing primitive areas that are incorrectly ordered according to contextual order relation ordering.

Ordering document content based on reading flow

A device sensor determines an external state of a device. Text to be displayed on a display screen of the device is dynamically filtered based on the external state of the device.

Adaptive and dynamic text filtering

A system and method for dilating a glyph for glyph rendering is described. The method includes receiving information including at least one of an element value of a rendering matrix, a glyph characteristic, a display background characteristic, an application characteristic, a display characteristic, and a graphics engine characteristic. The method further includes determining a dilation factor value from the received information. The method also includes dilating the outline of the glyph using the determined dilation factor.

System and method for dilation for glyph rendering

A Font Quantization Engine receives layout data including font, font matrix, glyphs and position data. This received position data includes non-integer positions for the glyphs to be rendered. According to a tolerance that is either pre-specified, or selected at run time an appropriate quantization level is determined by the Font Quantization Engine. This quantization level and the fractional position data is then used to determine quantized positions for the glyphs. Once the quantized positions are determined, a rendering engine either renders the bitmaps for the glyphs, or retrieves cached versions of the bitmaps. In this manner, glyphs are positioned at non-integer locations, yet a different bitmap is not required for each possible non-integer location. This allows for both efficiency of operation and the use of higher quality bitmaps.

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Redwood City, CA, United States of America

Derek B Clegg