Processing combining-character sequences

One or more computer-readable non-transitory storage media embodying software that is operable when executed to:

• by a computing device of a first user of an online social network hosted by a social-networking system, access a social graph maintained by the social-networking system, the social graph comprising a plurality of nodes and a plurality of edges connecting the nodes, wherein:
• a first node of the plurality of nodes corresponds to the first user,
• each of one or more second nodes of the plurality of nodes corresponds to a second user, entity, or content object;
• and
• each edge of the plurality of edges corresponds to a relationship between two nodes of the plurality of nodes;
• by the computing device, receive a notification from the social-networking system, wherein the notification comprises an indication of a Unicode character-encoding system and a combining-character sequence wherein the social-networking system generates the combining-character sequence to be sent to the first user based on information regarding at least one of the second nodes connected by one of the edges to the first node, and wherein:
• the Unicode character-encoding system comprises one or more ranges of character elements, each character element being associated with a respective code point in a codespace of the Unicode character-encoding system, and
• the combining-character sequence comprises two or more character elements in the one or more ranges of character elements, the two or more character elements comprising at least one base letter and one or more combining marks;
• by the computing device, determine, in response to the received notification, that there is no existing mapping code for the combining-character sequence in a mapping table stored on the computing device and based on the Unicode character-encoding system;
• by the computing device, generate, in response to the received notification, a new listing in the mapping table for a new mapping code for the combining-character sequence, wherein the codespace of the Unicode character-encoding system comprises a range of code points reserved for private use, and wherein the new mapping code is in the range of code points reserved for private use;
• by the computing device, request a glyph corresponding to the combining-character sequence, wherein the glyph is stored in association with the new mapping code;
• and
• by the computing device, provide information to display the glyph.

A client computing device associated with a first user of an online social network hosted by a social-networking system, comprising:

• one or more processors;
• and
• a memory coupled to the processors comprising instructions executable by the processors, the processors operable when executing the instructions to:
• access a social graph maintained by the social-networking system, the social graph comprising a plurality of nodes and a plurality of edges connecting the nodes, wherein:
• a first node of the plurality of nodes corresponds to the first user,
• each of one or more second nodes of the plurality of nodes corresponds to a second user, entity, or content object;
• and
• each edge of the plurality of edges corresponds to a relationship between two nodes of the plurality of nodes;
• receive a notification from the social-networking system, wherein the notification comprises an indication of a Unicode character-encoding system and a combining-character sequence, wherein the social-networking system generates the combining-character sequence to be sent to the first user based on information regarding at least one of the second nodes connected by one of the edges to the first node, and wherein:
• the Unicode character-encoding system comprises one or more ranges of character elements, each character element being associated with a respective code point in a codespace of the Unicode character-encoding system, and
• the combining-character sequence comprises two or more character elements in the one or more ranges of character elements, the two or more character elements comprising at least one base letter and one or more combining marks;
• determine, in response to the received notification, that there is no existing mapping code for the combining-character sequence in a mapping table stored on the computing device and based on the Unicode character-encoding system;
• generate, in response to the received notification, a new listing in the mapping table for a new mapping code for the combining-character sequence, wherein the codespace of the Unicode character-encoding system comprises a range of code points reserved for private use, and wherein the new mapping code is in the range of code points reserved for private use;
• request a glyph corresponding to the combining-character sequence, wherein the glyph is stored in association with the new mapping code;
• and
• provide information to display the glyph.