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Added "###" syntax to specify label that isn't part of the hashed ID (#107)

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ocornut 2015-03-07 21:53:33 +00:00
parent 3cac434737
commit 81a742bf54
1 changed files with 16 additions and 6 deletions
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18
imgui.cpp
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@ -657,6 +657,7 @@ static const char* ImStristr(const char* haystack, const char* needle, const cha
} }
// Pass data_size==0 for zero-terminated string // Pass data_size==0 for zero-terminated string
// Try to replace with FNV1a hash?
static ImU32 ImCrc32(const void* data, size_t data_size, ImU32 seed = 0) static ImU32 ImCrc32(const void* data, size_t data_size, ImU32 seed = 0)
{ {
static ImU32 crc32_lut[256] = { 0 }; static ImU32 crc32_lut[256] = { 0 };
@ -671,7 +672,9 @@ static ImU32 ImCrc32(const void* data, size_t data_size, ImU32 seed = 0)
crc32_lut[i] = crc; crc32_lut[i] = crc;
} }
} }
ImU32 crc = ~seed;
seed = ~seed;
ImU32 crc = seed;
const unsigned char* current = (const unsigned char*)data; const unsigned char* current = (const unsigned char*)data;
if (data_size > 0) if (data_size > 0)
@ -684,8 +687,17 @@ static ImU32 ImCrc32(const void* data, size_t data_size, ImU32 seed = 0)
{ {
// Zero-terminated string // Zero-terminated string
while (unsigned char c = *current++) while (unsigned char c = *current++)
{
// We support a syntax of "label###id" where only "###id" is included in the hash, and only "label" gets displayed.
// Because this syntax is rarely used we are optimizing for the common case.
// - If we reach ### in the string we discard the hash so far and reset to the seed.
// - We don't do 'current += 2; continue;' after handling ### to keep the code smaller.
if (c == '#' && current[0] == '#' && current[1] == '#')
crc = seed;
crc = (crc >> 8) ^ crc32_lut[(crc & 0xFF) ^ c]; crc = (crc >> 8) ^ crc32_lut[(crc & 0xFF) ^ c];
} }
}
return ~crc; return ~crc;
} }
@ -4283,8 +4295,7 @@ bool ImGui::CollapsingHeader(const char* label, const char* str_id, bool display
// When logging is enabled, if automatically expand tree nodes (but *NOT* collapsing headers.. seems like sensible behaviour). // When logging is enabled, if automatically expand tree nodes (but *NOT* collapsing headers.. seems like sensible behaviour).
// NB- If we are above max depth we still allow manually opened nodes to be logged. // NB- If we are above max depth we still allow manually opened nodes to be logged.
if (!display_frame) if (g.LogEnabled && !display_frame && window->DC.TreeDepth < g.LogAutoExpandMaxDepth)
if (g.LogEnabled && window->DC.TreeDepth < g.LogAutoExpandMaxDepth)
opened = true; opened = true;
if (!ItemAdd(bb, &id)) if (!ItemAdd(bb, &id))
@ -6389,7 +6400,6 @@ bool ImGui::IsClipped(const ImVec2& item_size)
static bool ItemAdd(const ImGuiAabb& bb, const ImGuiID* id) static bool ItemAdd(const ImGuiAabb& bb, const ImGuiID* id)
{ {
//ImGuiState& g = *GImGui;
ImGuiWindow* window = GetCurrentWindow(); ImGuiWindow* window = GetCurrentWindow();
window->DC.LastItemID = id ? *id : 0; window->DC.LastItemID = id ? *id : 0;
window->DC.LastItemAabb = bb; window->DC.LastItemAabb = bb;