236 lines
13 KiB
C++
236 lines
13 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2024
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#include "td/utils/emoji.h"
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#include "td/utils/base64.h"
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#include "td/utils/FlatHashSet.h"
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#include "td/utils/Gzip.h"
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namespace td {
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static constexpr size_t MAX_EMOJI_LENGTH = 28;
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static bool is_emoji_element(Slice str) {
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static const FlatHashSet<Slice, SliceHash> emojis = [max_emoji_length = MAX_EMOJI_LENGTH] {
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#if TD_HAVE_ZLIB
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Slice packed_emojis(
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"eJxtmlly40iWRbdCs_rrr56H3WVmzBHE4A6AxCCFqiodcBFOKShSComawqyWglpAl1lvoP0wcdPK2vrDnY-mC8e75_"
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"kkRUzLdjEtu8WUbWIbYwuxbWPbxXZYTOuX2F4XU13GVi2m5mNsn2L7HNuX2JaxJbGlsWWx5bGZ2GxsRWw_FlMbP9s_xRbHb-"
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"P4bRyzjWN2b2N7F1t8tovjd_Hn3T62-N7uLrbH2KL2LGrO4vvO4vvOLhfTeXzneXzmPI57Hp87j3mdrxfT1_j5dRUbccz_"
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"a3z3Nnrbni2mq5jXVbX428VPb2P3Jovd-5TO0Fm6gq6kQ_d-Rbemq-kaujZ2H3-mO0Xf6PZ0B7pbuju673QPdEe6x9h9yul42_InOkZZ_"
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"kL3ho6slu_"
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"o3tN9oPtI94nuM90XuiVdQkf2S3wsGXl5GhkfS3ws8bHExxIfS3ws8bHEx5LsY9Vjd0Z3TveV7oLuj3RXdNd0uFzu6G7o8LvE7xK_S_wu7-"
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"nwu8TvEr_LJ7pnuhe6V7ofsUuwn2A_wX6C_QT7CfYT7CfYT7CfYD_BfoL9BPsJ9hPsJ9hPsJ9gP8F-gv0E-wn2E-wn2E-wn2A_wX6C_"
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"QT7CfYT7CfYT7Cf_Inuz3S_0jm6nm6g83SXdBu6kS7QbelAl4AuAV0CugR0CegS0CWgS0CXMFUS-CXwS-CXwC-BXwK_"
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"BHQJ6FLQpaBLQZeCLgVdCroUdCnoUtCloEtBl4IuBV0KuhR0KehS0KWgS0GXgi7Ffor9FPsp9lPsp9hPsZ9iP8V-iv0U-yn2U-yn2E-xn2I_"
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"xX6K_RT7KfZT7KfYT7GfYj_Ffor9FPsp9lPsp0yfFAYpDDIYZDDIYJDBIINBBoMMBhkMMhhkMMhgkOE3w2-G3wy_GX4z_"
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"Gb4zfCb4TfDb4bfDL8ZfjP8ZvjN8JvhN8Nvht8Mvxl-M_"
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"xmGMxwlOEow1GGowxHGY4yHGU4ynGU4yjHUY6jHEc5jnIc5TjKcZTjKMdRTlVzqppT1Zyq5rjMcZnjMsdljsucBZGzIHIWRM6CyFkQOQsiZ0Hk"
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"LIicBZGzIHIWRM6CyCGUQyiHUA6hHEI5hHII5RDKIZRDKIdQDqEcQjmEcgjlEMohlDMjcmZEzozIAZYzI3JmRM6MyOGXwy-HXw6_HH45_"
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"HL4GdAZqBmoGagZqBmoGagZqBmoGagZqBmoGagZqBmoGagZqBmoGagZqBmoGagZqBmoGagZqBmoGagZqBmoGagZqBmoGagZqBmoGagZqBmoGag"
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"ZqBmoGagZqBmoGagZqBmoGagZqBmoGagZqBmoGagZqBmoGagZqBmoGaiZEzVmnQWdZdZZ-Fn4WfhZ-Fn4WfhZ-Fn4WfhZ-Fn4WfhZ-Fn4WfhZ-"
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"Fn4WfhZ-Fn4WfhZ-Fn4WfhZ-Fn4WfhZ-Fn4WfhZ-Fn4WfhZ-Fn4WfhZ-Fn4WfhZ-Fn4WfhZ-Fn4WfhZ-Fn4WfhZ-Fn4WfhZ-Fn4WfhZ-"
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"Fn4WfhZ-Fn4WfhZ-Fn4FfAr4FfAr4BfAb8CfgX8CvgV8CvgV8CvgF8BvwJ-BfwK-BXwK-BXwK-AXwG_An4F_"
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"Ar4FfAr4FfAr4BfAb8CfgX8CvgV8CvgV8CvgF8BvwJ-BfwK-BXwK-BXwK-AXwG_An4F_"
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"Ar4FfAr4FfAr4BfAb8CfgX8CvgV8CvgV8CvgF8BvwJqJdRKqJVQK6FWQq2EWgm1Emol1EqolVAroVZCrYRaCbUSaiXUSqiVUCuhVkKthFoJtRJ"
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"qJdRKqJVQK6FWQq2EWgm1Emol1EqolVAroVZCrYRaCbUSaiXUSqiVUCuhVkKthFoJtRJqJdRKqJVQK6FWQq2EWgm1Emol1EqolVAroVZCrWTWV"
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"divsF9hv8J-hfMK5xXOK5xXOK9wXuG8wnmF8wrnFc4rnFc4r3Be4bzCeYXzCucVziucVzivcF7hvMJ5RX4r3rHiHSska9Jdk-"
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"6adNcskjXlril3Tblryl1T7ppy15S7ptw15a4pd025a8pd47fGb43fGr815a4xXWO6xnSN6RrTNQnVJFRjusZ0jeka0zWma0zXmK4xXWO6xnSN"
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"6RrTNaZrHNWYrjFdY7qm3DXlril3Tblryl1T7ppy15S7ptw15a4pd025a8pdU-"
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"6acteUu6bcNeWuwVnDr4ZfDb8afjX8Gvg18Gvg18CvgV8DvwZ-Dfwa-DXwa-DXwK-BXwO_Bn4N_"
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"FrGaxmvZbyW8VrGaxmvZbyW8VrGaxmvZbyW8VrGaxmvZbz2NB71aKlHSz1a6tFSj5Z6tNSjpR4t9WipR0s9WurRUo-"
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"WerTUo6UeLfVoqUdLPVrq0VKPlnq01KOlHi31aKlHSz1a6tFSj5Z6tNSjpR4t9WipR0s9WurRUo-"
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"WerTUo6UeLfVoqUdLPVrq0VKPlnq01KOlHh38Ovh18Ovg18Gvg18HoQ4kHUg6kHSA6ADRAaLDdIfpDtMdpjuy78i-"
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"I7WO1DpS60itI7WO1DpS60itI7ULWF3A6gJWF7C6gNUFrC5gdQGrC1hdwOoCVhe87QIujnQdBXUU1FFQR_"
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"aO7B3ZOwrqKKjDh8OHw4ejoI6COgrqKKjDm8Obw5vDmyNJR5KOJB1JOpJ0JOlI0pGkI0lHko4kHUk6kDgK6iioo6DulDgFdRTUUVAHNQc1BzUH"
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"NQc1BzUHNQcwRy0dtXTUsqeWPbXsqWVPLXtq2VPLnmXQswx6lkHPMuhZBj3Ueqj1UOuh1kOth1oPtR5qPdR6qPVQ66HWQ62HWg-"
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"1Hmo91Hqo9VDrodZDrYdaD7Ueaj3Ueqj1UOuh1kOth1oPtR5qPdR6qPVQ66HWQ62HWg-"
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"1Hmo91Hqo9VDrodZDrYdaD7WeudaDrgddD7oedAPoBtANoBtAN4BuAN3ANjLAb4DfAL8BfgP8BvgN8BvgN8BvgN8AvwF-A_wG-A3wG-A3wG-"
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"A3wC_AX4D_Ab4DfAb4DfAb4DfAL8BfgP8BvgN8BvgN8BvgN8AvwF-A_wG-A3wG-A3wG-A3wC_AX4D_"
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"Ab4DfAb4DfAb4DfAL8BfgP8BvgN8BvgN8DPw8_Dz8PPw8_Dz8PPw8_Dz8PPw8_Dz8PPw8_Dz8PPw8_Dz8PPw8_Dz8PPw8_Dz8PPw8_Dz8PPw8_"
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"Dz8PPw8_Dz8PPw8_Dz8PPw8_Dz8PPw8_Dz8PPw8_Dz8PPw8_Dz8PPw8_Dz8PPw8_Dz8PPw8_Dz8PPw8_Dz8PPw8_Dz8PPw2_"
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"DeBvG2zDehvE2jLdhvA3jbRhvw3gbxtsw3obxNow3UoCRAowUYKQAIwUYKcBIAUYKMFKAEbojdEfojtAdoTtCd4TuCN0RuiN0R-"
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"iO0B2hO0J3hO4I3RG6I3RH6I7QHaE7QneE7gjdEbojdEfojtAdoTtCd4TuCN0RGiM0RmiM0BihMUJjhMYIjREaIzRGaIzQGE80oDsCNsAlwCXA"
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"JcAlwCXAJTDhAhMugCSAJIAkgCSAJIAkgCSAJIAkgCSAJIAkYD9gP2A_YD9gP2A_YD9gP2A_4C3gLeAt4C3gLeAt4C3gLTws_rJZ_"
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"OV6Mf30vJh-_rSY3v45tuNiel_GVsW2im0dWx1bE9smtnExLS8XU5bFdhVbfD77FttNbPvYHmKLY2SPiyn-ljeton4VYvu-mNY_"
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"xfYUW3xfvOZO8ZY7xUvuFO-4U7ziTvHSOsWb6hSvolO8dU7xqjnFS-YU75hTvFhO8SI5xYvjFO-"
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"NU7wOTvE2OMXL4BSvfFO87E3NRWzxmSbqmz62-"
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"EwTc23iO5vXxRQvXFO8ak3xpjXFi9YU71lTvGFN8W41xavVFK9SU7wrTfEKNMUb0NR9jC36jFeTqStii_67-LOOn93Gdh9bzCNeNaaz-P6zqD-"
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"LHM-WsSWxxWfP4jvP4jvP4vvOoqezP8V2iC0-fx49n3-ILeZ77hbT1_izeDJP8WCetu9iex_bh8Vff9rF9rL46-d1bMyMd5T4HSV-xwJ_"
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"xzz8yOz7ePqrMhNlyfRYMj2WTI8l02PJ9FiyOpasjiWrY8nqWJ7-"
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"onr6oyHzMGUeprwoZQqmTMGUtZiyFjO21IwtNWNLzZjhGRM5YyJnDJAxQMZEzhglY5SMUTLWdsbazhgvO43HBM2Ym9npT1iYMac_Epx-"
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"j2Mrr9jKKxZuhfOKJyqmdMVjFdlXPFuxXCuW64qtaMVjK9Jdke6KdFcswxVcVtBYAXHFOlmdfhcD4polvGYJr1mua5brmuW6Jvs12a_"
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"Jfg3nNWtxzVBr8luT2vp06-S9Ha_sINSxB3Ss447HOtZxx7MdhepIqKMyHQa7w-IP05tfF3_474eMz384dfOXfzx185d_OnXzl38-"
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"dfOXfzl185d_PXXzl387dfOXfz9185f_OHXzl_88dfOX_zp185e_"
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"XXwYYrtUsFEwKggKtgquFdwo2Cu4VfBdwb2CBwVHBY8KnhW8KGDifPB8UeAVbBSMCoKCrYIrBdcKvim4UbBXcFBwq-"
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"C7gnsFDwqOCp4UPCt4VXBK_lLJXwrvpZK_"
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"VM6XyvlSOV8qZ4KdghsFewUHBbcK7hTcK3hU8KTgWcGLglcFp5w3orpRYhuh2yifjdLY6O0bPT7K8ijLowYcNeAop6NSHYV3FN5RyQfRCEojKI"
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"2gNILSCBpwqzS2mjZbkd8qn61KsFViWyW21Uu3Ir_Vu7YivxXwrWbL9u_f_qDgqOBRwbOCE_"
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"kr2bnSK670iisNeKVxrjTOtfBey9e1fF0r52sNeK0BrwXqWjlf6xXXyvla7_qmAb9pnG96_Ju876TZieFODHdiuNPjO6Wx-_"
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"vH7xU8K3hVcJpRNyrljUp5I-83esWNGN5owBvZuZGdG6EjeFJwetder9hr5L2o7mVwr9myl9O9nO719r3I72V5L8t7odvL-14l2CvnvXLeK-"
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"e9ct4r571AEbwo-N3FidhBdg6yc5CLg1wc5OIghgclf1CqB6V6UIYH5XPQu27l9E4vvdO77vSuO73rTsTuROxOL737-3EOCu4VPCg4KnhWcPL-"
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"XW-_19vv5eJej98r-Xs9_qCnCLyCSwUbBaOCrYIrBdcKvinYKbhRsFdwUHCr4F7Bg4KjgicFLwpeFZzIH5X8UTkflfNR5I_K-"
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"aicj0r1qFSPSvWoVI9K9ahUj0r1qAyPyvAomEcl9qjEHvX2R438qJEfZflRvh71-JMef5KvJ5XgSQM-ifyTBnxScZ_l_VmveJHTV43zKhc_"
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"9K4fyvDHbCe7_Z8__uxj-3NsfWzX8_cf__eHh9h-je32__vhfWzbWfSD34JO_wj-2-fz_Pkyf77Onz_4DeQ33enzef58mT9f588f_Jeg33Snz-"
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"f582X-fJ0_0X2ZdV9m3ZdZ92XWfZl1y1m3nHXLWbecdctZl8y6ZNYlsy6Zdcn8D_vpu_lf_U_Bs4IXBa8KTuR-0X8R-EX_TeAX_VeBX_"
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"TfBX6R-I3EbyR-I_Ebid9I_FbitxK_lfitxG8l_iDxB4k_SPxB4g8Sf5b4s8SfJf4s8WeJv0j8ReIvEn-R-"
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"IvES4mXEi8lXkq8nMVG6IzQGaEzQmeEzgidETojdEbojNCZ9xK_l_i9xO8lfi-x0BmhM0JnhM4Infko8UeJP0r8UeKPEn-S-JPEnyT-"
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"JPEniVUUo6IYFcWoKEZFMSqKUVGMimJUFKOiGBXFqChGRTEqivm9KInEicSJxInEWikmlTiVOJU4lTiVOJM4kziTOJM4kziXOJc4lziXOJd4kH"
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"iQeJB4kHiQ2EvsJfYSe4m9xJcSX0p8KfGlxJcSbyTeSLyReCPxRuIgcZA4SBwkDhJvJd5KvJV4K_FW4iuJryS-kvhK4iuJryW-"
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"lvha4muJryXeSbyTeCfxTuKdxDcS30h8I_GNxDcS7yXeS7yXeC_"
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"xXuKDxAeJDxIfJD5IfCvxrcS3Et9KfCvxncR3Et9JfCfxncTfJf4u8XeJv0v8XeJ7ie8lvpf4XuJ7iR8kfpD4QeIHiR8kfpb4WeJniZ8lfp7F9"
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"udZfAqeFbwoeFVwEmt_ttqfrfZnq_3Zan-22p-t9mer_"
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"dlqf7ban61OWKsT1uqEtTphrU5Yq83cajO32sytNnOrzdxqM7fazK02c6vN3Gozt9qRrHYkqx3Jakey2pGskdhIbCQ2EhuJR4lHiUeJR4nHWVx"
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"pilaaopWmaKUpWmmKVpqilaZopSlaaYpWmqLVo8SPEj9K_"
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"Cjx4yxe5bP4FDwreFHwquAkriSuJK4kriSuJF5JvJJ4JfFK4tUsbjQ3Gs2NRnOj0dxoNDcazY1Gc6PR3Gg0NxrNjUZzo9HcaDQ3Gs2NRnOj0Qn"
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"b6IRtdMI2OmEbnbCNTthGJ2yjE7bRCdvohG10wjY6YRudsI1O2EYnbKMTttEJ2-"
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"iEbXTCNjphG83nRvO50XxuNJ8bzef211l8Cp4VvCh4VXASa4q2mqKtpmirKdpqiraaoq2maKsp2mqKtpqirXbRVrtoq1201S7aahftfprFp-"
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"BZwYuCVwUnsYrSqSiditKpKJ2K4iR2EjuJncTud7E4O3F24uzE2YmzqyWuJa4lriWuJW4kbiRuJG4kbiRuJW4lbiVuJW4l7iTuJO4k7iTuJD6T"
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"-EziM4nPJD6T-Fzic4nPJT6X-FzirxJ_lfirxF8l_irxhcQXEl9IfCHxhcS6BDpdAp0ugU6XQKdLoNtJvJN4J_"
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"FO4p3Eusk43WScbjJONxmnm4zTTcbpJuN0k3G6yTjdZJxuMk43GaebjNNNxukm47QGndag0xp0WoNOa9BpDTqtQac16LQGndag0xp0WoNOa9Bp"
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"DTqtQaebjNNNxukm43STcbrJON1knG4yTjcZp5uM003GHSU-SnyU-CjxUeIXiV8kfpH4ReIXiV8lfpX4VeJXiV9ncS-DvQz2MtjLYC-"
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"DgzgP4jyI8yDOgzgP4jyI8yDOgzgP4jwI3SB0g9ANQjcI3SB0g9ANQjcI3SB0w5PETxI_"
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"Sfwk8dMs9jqtvE4rr9PK67TyOq28Tiuv08rrtPI6rbxOK69d1GsX9dpFvXZRr13U6_bldfvyun153b68bl_"
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"eSmwlthJbia3EhcSFxIXEhcSFxKXEpcSlxKXEpcS6I3ndkbzuSF53JK87ktcdyeuO5HVH8rojed2R_"
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"FritcRridcSryXWAeR1AHkdQF4HkNcB5HUAeR1AXgeQ1wHkdQB5HUBeB5DXAeR1AHkdQF4HkNcB5HUAeR1AXgeQ1wHkdQB5HUBeB5DXAeR1AHk"
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"dQF4HkNcB5HUABf2eEvR7StDvKUG_pwT9nhL0J7igP8EF_Qku6E9wQX-"
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"CC7q4Bl1cgy6uQRfXoItr2Em8k3gn8U7incQ6gIIOoKADKOgACjqAgg6goAMo6AAKOoCCDqCgAyjoAAo6gIIOoKADKOgACjqAgg6goAMo6AAK2"
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"hiDNsagjTFoYwzaGIM2xqCNMWhjDNoYgzbGoP05aH8O2p-D9ueg_TloFw3aRYN20aBdNPy2i_4vsAI1eQ");
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static string all_emojis_str = gzdecode(base64url_decode(packed_emojis).ok()).as_slice().str();
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constexpr size_t EMOJI_COUNT = 2326;
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#else
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string all_emojis_str;
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constexpr size_t EMOJI_COUNT = 0;
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#endif
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FlatHashSet<Slice, SliceHash> all_emojis;
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all_emojis.reserve(EMOJI_COUNT);
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for (size_t i = 0; i < all_emojis_str.size(); i++) {
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CHECK(all_emojis_str[i] != ' ');
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CHECK(all_emojis_str[i + 1] != ' ');
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size_t j = i + 2;
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while (j < all_emojis_str.size() && all_emojis_str[j] != ' ') {
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j++;
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}
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CHECK(j < all_emojis_str.size());
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all_emojis.insert(Slice(&all_emojis_str[i], &all_emojis_str[j]));
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CHECK(j - i <= max_emoji_length);
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i = j;
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}
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CHECK(all_emojis.size() == EMOJI_COUNT);
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return all_emojis;
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}();
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auto len = str.size();
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if (len > MAX_EMOJI_LENGTH + 3) {
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return false;
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}
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if (emojis.count(str) != 0) {
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return true;
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}
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if (len <= 3 || str[len - 3] != '\xEF' || str[len - 2] != '\xB8' || str[len - 1] != '\x8F') {
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return false;
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}
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if (len >= 6 && str[len - 6] == '\xEF' && str[len - 5] == '\xB8' && str[len - 4] == '\x8F') {
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return false;
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}
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return emojis.count(str.substr(0, len - 3)) != 0;
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}
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bool is_emoji(Slice str) {
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size_t i = str.substr(0, MAX_EMOJI_LENGTH + 4).find('\xE2');
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if (i == Slice::npos) {
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return is_emoji_element(str);
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}
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size_t start_pos = 0;
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for (; i + 3 < str.size(); i++) {
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if (str[i] == '\xE2' && str[i + 1] == '\x80' && str[i + 2] == '\x8D') {
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// zero-width joiner \u200D
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if (!is_emoji_element(str.substr(start_pos, i - start_pos))) {
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return false;
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}
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start_pos = i + 3;
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i += 2;
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}
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}
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return is_emoji_element(str.substr(start_pos));
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}
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int get_fitzpatrick_modifier(Slice emoji) {
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if (emoji.size() < 4 || emoji[emoji.size() - 4] != '\xF0' || emoji[emoji.size() - 3] != '\x9F' ||
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emoji[emoji.size() - 2] != '\x8F') {
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return 0;
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}
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auto c = static_cast<unsigned char>(emoji.back());
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if (c < 0xBB || c > 0xBF) {
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return 0;
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}
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return (c - 0xBB) + 2;
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}
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Slice remove_fitzpatrick_modifier(Slice emoji) {
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while (get_fitzpatrick_modifier(emoji) != 0) {
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emoji.remove_suffix(4);
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}
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return emoji;
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}
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string remove_emoji_modifiers(Slice emoji, bool remove_selectors) {
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string result = emoji.str();
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remove_emoji_modifiers_in_place(result, remove_selectors);
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return result;
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}
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void remove_emoji_modifiers_in_place(string &emoji, bool remove_selectors) {
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static const Slice modifiers[] = {u8"\uFE0F" /* variation selector-16 */,
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u8"\u200D\u2640" /* zero width joiner + female sign */,
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u8"\u200D\u2642" /* zero width joiner + male sign */,
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u8"\U0001F3FB" /* emoji modifier fitzpatrick type-1-2 */,
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u8"\U0001F3FC" /* emoji modifier fitzpatrick type-3 */,
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u8"\U0001F3FD" /* emoji modifier fitzpatrick type-4 */,
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u8"\U0001F3FE" /* emoji modifier fitzpatrick type-5 */,
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u8"\U0001F3FF" /* emoji modifier fitzpatrick type-6 */};
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const size_t start_index = remove_selectors ? 0 : 1;
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size_t j = 0;
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for (size_t i = 0; i < emoji.size();) {
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bool is_found = false;
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for (size_t k = start_index; k < sizeof(modifiers) / sizeof(*modifiers); k++) {
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auto length = modifiers[k].size();
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if (i + length <= emoji.size() && Slice(&emoji[i], length) == modifiers[k]) {
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// skip the modifier
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i += length;
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is_found = true;
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|
break;
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|
}
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}
|
|
if (!is_found) {
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emoji[j++] = emoji[i++];
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}
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}
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if (j != 0) {
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emoji.resize(j);
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}
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|
}
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|
|
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string remove_emoji_selectors(Slice emoji) {
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if (!is_emoji(emoji)) {
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|
return emoji.str();
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}
|
|
string str;
|
|
for (size_t i = 0; i < emoji.size(); i++) {
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if (i + 3 <= emoji.size() && emoji[i] == '\xEF' && emoji[i + 1] == '\xB8' && emoji[i + 2] == '\x8F') {
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// skip \uFE0F
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|
i += 2;
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} else {
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|
str += emoji[i];
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|
}
|
|
}
|
|
CHECK(is_emoji(str));
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|
return str;
|
|
}
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|
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} // namespace td
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