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Internals: extracted stack checking code into a ImGuiStackSizes helper struct + added test for FocusScope

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+ renamed g.ColorModifiers > g.ColorStack, g.StyleModifiers > g.StyleVarStack
docking
ocornut 4 years ago
parent 6e94013a3d
commit 8119759329
2 changed files with 66 additions and 32 deletions
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63
imgui.cpp
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@ -872,7 +872,6 @@ static int FindWindowFocusIndex(ImGuiWindow* window);
// Error Checking // Error Checking
static void ErrorCheckNewFrameSanityChecks(); static void ErrorCheckNewFrameSanityChecks();
static void ErrorCheckEndFrameSanityChecks(); static void ErrorCheckEndFrameSanityChecks();
static void ErrorCheckBeginEndCompareStacksSize(ImGuiWindow* window, bool begin);
// Misc // Misc
static void UpdateSettings(); static void UpdateSettings();
@ -2352,7 +2351,7 @@ void ImGui::PushStyleColor(ImGuiCol idx, ImU32 col)
ImGuiColorMod backup; ImGuiColorMod backup;
backup.Col = idx; backup.Col = idx;
backup.BackupValue = g.Style.Colors[idx]; backup.BackupValue = g.Style.Colors[idx];
g.ColorModifiers.push_back(backup); g.ColorStack.push_back(backup);
g.Style.Colors[idx] = ColorConvertU32ToFloat4(col); g.Style.Colors[idx] = ColorConvertU32ToFloat4(col);
} }
@ -2362,7 +2361,7 @@ void ImGui::PushStyleColor(ImGuiCol idx, const ImVec4& col)
ImGuiColorMod backup; ImGuiColorMod backup;
backup.Col = idx; backup.Col = idx;
backup.BackupValue = g.Style.Colors[idx]; backup.BackupValue = g.Style.Colors[idx];
g.ColorModifiers.push_back(backup); g.ColorStack.push_back(backup);
g.Style.Colors[idx] = col; g.Style.Colors[idx] = col;
} }
@ -2371,9 +2370,9 @@ void ImGui::PopStyleColor(int count)
ImGuiContext& g = *GImGui; ImGuiContext& g = *GImGui;
while (count > 0) while (count > 0)
{ {
ImGuiColorMod& backup = g.ColorModifiers.back(); ImGuiColorMod& backup = g.ColorStack.back();
g.Style.Colors[backup.Col] = backup.BackupValue; g.Style.Colors[backup.Col] = backup.BackupValue;
g.ColorModifiers.pop_back(); g.ColorStack.pop_back();
count--; count--;
} }
} }
@ -2427,7 +2426,7 @@ void ImGui::PushStyleVar(ImGuiStyleVar idx, float val)
{ {
ImGuiContext& g = *GImGui; ImGuiContext& g = *GImGui;
float* pvar = (float*)var_info->GetVarPtr(&g.Style); float* pvar = (float*)var_info->GetVarPtr(&g.Style);
g.StyleModifiers.push_back(ImGuiStyleMod(idx, *pvar)); g.StyleVarStack.push_back(ImGuiStyleMod(idx, *pvar));
*pvar = val; *pvar = val;
return; return;
} }
@ -2441,7 +2440,7 @@ void ImGui::PushStyleVar(ImGuiStyleVar idx, const ImVec2& val)
{ {
ImGuiContext& g = *GImGui; ImGuiContext& g = *GImGui;
ImVec2* pvar = (ImVec2*)var_info->GetVarPtr(&g.Style); ImVec2* pvar = (ImVec2*)var_info->GetVarPtr(&g.Style);
g.StyleModifiers.push_back(ImGuiStyleMod(idx, *pvar)); g.StyleVarStack.push_back(ImGuiStyleMod(idx, *pvar));
*pvar = val; *pvar = val;
return; return;
} }
@ -2454,12 +2453,12 @@ void ImGui::PopStyleVar(int count)
while (count > 0) while (count > 0)
{ {
// We avoid a generic memcpy(data, &backup.Backup.., GDataTypeSize[info->Type] * info->Count), the overhead in Debug is not worth it. // We avoid a generic memcpy(data, &backup.Backup.., GDataTypeSize[info->Type] * info->Count), the overhead in Debug is not worth it.
ImGuiStyleMod& backup = g.StyleModifiers.back(); ImGuiStyleMod& backup = g.StyleVarStack.back();
const ImGuiStyleVarInfo* info = GetStyleVarInfo(backup.VarIdx); const ImGuiStyleVarInfo* info = GetStyleVarInfo(backup.VarIdx);
void* data = info->GetVarPtr(&g.Style); void* data = info->GetVarPtr(&g.Style);
if (info->Type == ImGuiDataType_Float && info->Count == 1) { ((float*)data)[0] = backup.BackupFloat[0]; } if (info->Type == ImGuiDataType_Float && info->Count == 1) { ((float*)data)[0] = backup.BackupFloat[0]; }
else if (info->Type == ImGuiDataType_Float && info->Count == 2) { ((float*)data)[0] = backup.BackupFloat[0]; ((float*)data)[1] = backup.BackupFloat[1]; } else if (info->Type == ImGuiDataType_Float && info->Count == 2) { ((float*)data)[0] = backup.BackupFloat[0]; ((float*)data)[1] = backup.BackupFloat[1]; }
g.StyleModifiers.pop_back(); g.StyleVarStack.pop_back();
count--; count--;
} }
} }
@ -3996,8 +3995,8 @@ void ImGui::Shutdown(ImGuiContext* context)
g.HoveredWindow = g.HoveredRootWindow = g.HoveredWindowUnderMovingWindow = NULL; g.HoveredWindow = g.HoveredRootWindow = g.HoveredWindowUnderMovingWindow = NULL;
g.ActiveIdWindow = g.ActiveIdPreviousFrameWindow = NULL; g.ActiveIdWindow = g.ActiveIdPreviousFrameWindow = NULL;
g.MovingWindow = NULL; g.MovingWindow = NULL;
g.ColorModifiers.clear(); g.ColorStack.clear();
g.StyleModifiers.clear(); g.StyleVarStack.clear();
g.FontStack.clear(); g.FontStack.clear();
g.OpenPopupStack.clear(); g.OpenPopupStack.clear();
g.BeginPopupStack.clear(); g.BeginPopupStack.clear();
@ -5515,8 +5514,10 @@ bool ImGui::Begin(const char* name, bool* p_open, ImGuiWindowFlags flags)
// Add to stack // Add to stack
// We intentionally set g.CurrentWindow to NULL to prevent usage until when the viewport is set, then will call SetCurrentWindow() // We intentionally set g.CurrentWindow to NULL to prevent usage until when the viewport is set, then will call SetCurrentWindow()
g.CurrentWindowStack.push_back(window); g.CurrentWindowStack.push_back(window);
g.CurrentWindow = window;
window->DC.StackSizesOnBegin.SetToCurrentState();
g.CurrentWindow = NULL; g.CurrentWindow = NULL;
ErrorCheckBeginEndCompareStacksSize(window, true);
if (flags & ImGuiWindowFlags_Popup) if (flags & ImGuiWindowFlags_Popup)
{ {
ImGuiPopupData& popup_ref = g.OpenPopupStack[g.BeginPopupStack.Size]; ImGuiPopupData& popup_ref = g.OpenPopupStack[g.BeginPopupStack.Size];
@ -6112,7 +6113,7 @@ void ImGui::End()
g.CurrentWindowStack.pop_back(); g.CurrentWindowStack.pop_back();
if (window->Flags & ImGuiWindowFlags_Popup) if (window->Flags & ImGuiWindowFlags_Popup)
g.BeginPopupStack.pop_back(); g.BeginPopupStack.pop_back();
ErrorCheckBeginEndCompareStacksSize(window, false); window->DC.StackSizesOnBegin.CompareWithCurrentState();
SetCurrentWindow(g.CurrentWindowStack.empty() ? NULL : g.CurrentWindowStack.back()); SetCurrentWindow(g.CurrentWindowStack.empty() ? NULL : g.CurrentWindowStack.back());
} }
@ -6903,26 +6904,38 @@ static void ImGui::ErrorCheckEndFrameSanityChecks()
IM_ASSERT_USER_ERROR(g.GroupStack.Size == 0, "Missing EndGroup call!"); IM_ASSERT_USER_ERROR(g.GroupStack.Size == 0, "Missing EndGroup call!");
} }
// Save and compare stack sizes on Begin()/End() to detect usage errors // Save current stack sizes for later compare
// Begin() calls this with write=true void ImGuiStackSizes::SetToCurrentState()
// End() calls this with write=false {
static void ImGui::ErrorCheckBeginEndCompareStacksSize(ImGuiWindow* window, bool begin) ImGuiContext& g = *GImGui;
ImGuiWindow* window = g.CurrentWindow;
SizeOfIDStack = (short)window->IDStack.Size;
SizeOfColorStack = (short)g.ColorStack.Size;
SizeOfStyleVarStack = (short)g.StyleVarStack.Size;
SizeOfFontStack = (short)g.FontStack.Size;
SizeOfFocusScopeStack = (short)g.FocusScopeStack.Size;
SizeOfGroupStack = (short)g.GroupStack.Size;
SizeOfBeginPopupStack = (short)g.BeginPopupStack.Size;
}
// Compare to detect usage errors
void ImGuiStackSizes::CompareWithCurrentState()
{ {
ImGuiContext& g = *GImGui; ImGuiContext& g = *GImGui;
short* p = &window->DC.StackSizesBackup[0]; ImGuiWindow* window = g.CurrentWindow;
// Window stacks // Window stacks
// NOT checking: DC.ItemWidth, DC.TextWrapPos (per window) to allow user to conveniently push once and not pop (they are cleared on Begin) // NOT checking: DC.ItemWidth, DC.TextWrapPos (per window) to allow user to conveniently push once and not pop (they are cleared on Begin)
{ IM_ASSERT(window->IDStack.Size == 1 && "PushID/PopID or TreeNode/TreePop Mismatch!"); } // Too few or too many PopID()/TreePop(); IM_ASSERT(SizeOfIDStack == window->IDStack.Size && "PushID/PopID or TreeNode/TreePop Mismatch!");
// Global stacks // Global stacks
// For color, style and font stacks there is an incentive to use Push/Begin/Pop/.../End patterns, so we relax our checks a little to allow them. // For color, style and font stacks there is an incentive to use Push/Begin/Pop/.../End patterns, so we relax our checks a little to allow them.
{ int n = g.GroupStack.Size; if (begin) *p = (short)n; else IM_ASSERT(*p == n && "BeginGroup/EndGroup Mismatch!"); p++; } // Too few or too many EndGroup() IM_ASSERT(SizeOfGroupStack == g.GroupStack.Size && "BeginGroup/EndGroup Mismatch!");
{ int n = g.BeginPopupStack.Size; if (begin) *p = (short)n; else IM_ASSERT(*p == n && "BeginMenu/EndMenu or BeginPopup/EndPopup Mismatch!"); p++; }// Too few or too many EndMenu()/EndPopup() IM_ASSERT(SizeOfBeginPopupStack == g.BeginPopupStack.Size && "BeginPopup/EndPopup or BeginMenu/EndMenu Mismatch!");
{ int n = g.ColorModifiers.Size; if (begin) *p = (short)n; else IM_ASSERT(*p >= n && "PushStyleColor/PopStyleColor Mismatch!"); p++; } // Too few or too many PopStyleColor() IM_ASSERT(SizeOfColorStack >= g.ColorStack.Size && "PushStyleColor/PopStyleColor Mismatch!");
{ int n = g.StyleModifiers.Size; if (begin) *p = (short)n; else IM_ASSERT(*p >= n && "PushStyleVar/PopStyleVar Mismatch!"); p++; } // Too few or too many PopStyleVar() IM_ASSERT(SizeOfStyleVarStack >= g.StyleVarStack.Size && "PushStyleVar/PopStyleVar Mismatch!");
{ int n = g.FontStack.Size; if (begin) *p = (short)n; else IM_ASSERT(*p >= n && "PushFont/PopFont Mismatch!"); p++; } // Too few or too many PopFont() IM_ASSERT(SizeOfFontStack >= g.FontStack.Size && "PushFont/PopFont Mismatch!");
IM_ASSERT(p == window->DC.StackSizesBackup + IM_ARRAYSIZE(window->DC.StackSizesBackup)); IM_ASSERT(SizeOfFocusScopeStack == g.FocusScopeStack.Size && "PushFocusScope/PopFocusScope Mismatch!");
} }

35
imgui_internal.h
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@ -23,6 +23,7 @@ Index of this file:
// [SECTION] Docking support // [SECTION] Docking support
// [SECTION] Viewport support // [SECTION] Viewport support
// [SECTION] Settings support // [SECTION] Settings support
// [SECTION] Metrics, Debug
// [SECTION] Generic context hooks // [SECTION] Generic context hooks
// [SECTION] ImGuiContext (main imgui context) // [SECTION] ImGuiContext (main imgui context)
// [SECTION] ImGuiWindowTempData, ImGuiWindow // [SECTION] ImGuiWindowTempData, ImGuiWindow
@ -106,6 +107,7 @@ struct ImGuiNextWindowData; // Storage for SetNextWindow** functions
struct ImGuiNextItemData; // Storage for SetNextItem** functions struct ImGuiNextItemData; // Storage for SetNextItem** functions
struct ImGuiPopupData; // Storage for current popup stack struct ImGuiPopupData; // Storage for current popup stack
struct ImGuiSettingsHandler; // Storage for one type registered in the .ini file struct ImGuiSettingsHandler; // Storage for one type registered in the .ini file
struct ImGuiStackSizes; // Storage of stack sizes for debugging/asserting
struct ImGuiStyleMod; // Stacked style modifier, backup of modified data so we can restore it struct ImGuiStyleMod; // Stacked style modifier, backup of modified data so we can restore it
struct ImGuiTabBar; // Storage for a tab bar struct ImGuiTabBar; // Storage for a tab bar
struct ImGuiTabItem; // Storage for a tab item (within a tab bar) struct ImGuiTabItem; // Storage for a tab item (within a tab bar)
@ -1089,6 +1091,10 @@ struct ImGuiSettingsHandler
ImGuiSettingsHandler() { memset(this, 0, sizeof(*this)); } ImGuiSettingsHandler() { memset(this, 0, sizeof(*this)); }
}; };
//-----------------------------------------------------------------------------
// [SECTION] Metrics, Debug
//-----------------------------------------------------------------------------
struct ImGuiMetricsConfig struct ImGuiMetricsConfig
{ {
bool ShowWindowsRects; bool ShowWindowsRects;
@ -1111,6 +1117,21 @@ struct ImGuiMetricsConfig
} }
}; };
struct IMGUI_API ImGuiStackSizes
{
short SizeOfIDStack;
short SizeOfColorStack;
short SizeOfStyleVarStack;
short SizeOfFontStack;
short SizeOfFocusScopeStack;
short SizeOfGroupStack;
short SizeOfBeginPopupStack;
ImGuiStackSizes() { memset(this, 0, sizeof(*this)); }
IMGUI_API void SetToCurrentState();
IMGUI_API void CompareWithCurrentState();
};
//----------------------------------------------------------------------------- //-----------------------------------------------------------------------------
// [SECTION] Generic context hooks // [SECTION] Generic context hooks
//----------------------------------------------------------------------------- //-----------------------------------------------------------------------------
@ -1205,12 +1226,12 @@ struct ImGuiContext
ImGuiNextItemData NextItemData; // Storage for SetNextItem** functions ImGuiNextItemData NextItemData; // Storage for SetNextItem** functions
// Shared stacks // Shared stacks
ImVector<ImGuiColorMod> ColorModifiers; // Stack for PushStyleColor()/PopStyleColor() ImVector<ImGuiColorMod> ColorStack; // Stack for PushStyleColor()/PopStyleColor() - inherited by Begin()
ImVector<ImGuiStyleMod> StyleModifiers; // Stack for PushStyleVar()/PopStyleVar() ImVector<ImGuiStyleMod> StyleVarStack; // Stack for PushStyleVar()/PopStyleVar() - inherited by Begin()
ImVector<ImFont*> FontStack; // Stack for PushFont()/PopFont() ImVector<ImFont*> FontStack; // Stack for PushFont()/PopFont() - inherited by Begin()
ImVector<ImGuiID> FocusScopeStack; // Stack for PushFocusScope()/PopFocusScope() ImVector<ImGuiID> FocusScopeStack; // Stack for PushFocusScope()/PopFocusScope() - not inherited by Begin(), unless child window
ImVector<ImGuiItemFlags>ItemFlagsStack; // Stack for PushItemFlag()/PopItemFlag() ImVector<ImGuiItemFlags>ItemFlagsStack; // Stack for PushItemFlag()/PopItemFlag() - inherited by Begin()
ImVector<ImGuiGroupData>GroupStack; // Stack for BeginGroup()/EndGroup() ImVector<ImGuiGroupData>GroupStack; // Stack for BeginGroup()/EndGroup() - not inherited by Begin()
ImVector<ImGuiPopupData>OpenPopupStack; // Which popups are open (persistent) ImVector<ImGuiPopupData>OpenPopupStack; // Which popups are open (persistent)
ImVector<ImGuiPopupData>BeginPopupStack; // Which level of BeginPopup() we are in (reset every frame) ImVector<ImGuiPopupData>BeginPopupStack; // Which level of BeginPopup() we are in (reset every frame)
@ -1561,7 +1582,7 @@ struct IMGUI_API ImGuiWindowTempData
float TextWrapPos; // == TextWrapPosStack.back() [empty == -1.0f] float TextWrapPos; // == TextWrapPosStack.back() [empty == -1.0f]
ImVector<float> ItemWidthStack; ImVector<float> ItemWidthStack;
ImVector<float> TextWrapPosStack; ImVector<float> TextWrapPosStack;
short StackSizesBackup[5]; // Store size of various stacks for asserting ImGuiStackSizes StackSizesOnBegin; // Store size of various stacks for asserting
}; };
// Storage for one window // Storage for one window

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