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[client] wayland: prefer PNG over other image types
Support for non-PNG types is optional in the spice agent, so we should avoid sending those if PNG is available. Currently, the spice VDAgent supports only PNG and BMP formats.
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@ -151,6 +151,23 @@ static enum LG_ClipboardData mimetypeToCbType(const char * mimetype)
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return LG_CLIPBOARD_DATA_NONE;
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}
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static bool isOptionalImageCbtype(enum LG_ClipboardData type)
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{
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switch (type)
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{
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case LG_CLIPBOARD_DATA_TEXT:
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case LG_CLIPBOARD_DATA_PNG:
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return false;
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case LG_CLIPBOARD_DATA_BMP:
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case LG_CLIPBOARD_DATA_TIFF:
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case LG_CLIPBOARD_DATA_JPEG:
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return true;
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default:
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DEBUG_ERROR("invalid clipboard type");
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abort();
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}
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}
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// Destination client handlers.
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static void dataOfferHandleOffer(void * data, struct wl_data_offer * offer,
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@ -160,9 +177,13 @@ static void dataOfferHandleOffer(void * data, struct wl_data_offer * offer,
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// We almost never prefer text/html, as that's used to represent rich text.
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// Since we can't copy or paste rich text, we should instead prefer actual
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// images or plain text.
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// We also prefer PNG over other image types as it's the only type guaranteed
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// to be supported by the spice agent.
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if (type != LG_CLIPBOARD_DATA_NONE &&
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(wlCb.pendingType == LG_CLIPBOARD_DATA_NONE ||
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strstr(wlCb.pendingMimetype, "html")))
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strstr(wlCb.pendingMimetype, "html") ||
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(type == LG_CLIPBOARD_DATA_PNG &&
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isOptionalImageCbtype(wlCb.pendingType))))
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{
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wlCb.pendingType = type;
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if (wlCb.pendingMimetype)
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