From 048add5ef20fa06a3ca6062be927b2bee1059feb Mon Sep 17 00:00:00 2001
From: omar <omarcornut@gmail.com>
Date: Thu, 19 Jul 2018 15:22:18 +0200
Subject: [PATCH] ImGuiTextFilter, TextRange: removed cruft from TextRange
 since it's not a publicly and generic helper at the moment + marked internal
 stuff + changed a reference to a pointer. (#1879)

---
 imgui.cpp | 22 +++++++++++++---------
 imgui.h   | 27 ++++++++++++---------------
 2 files changed, 25 insertions(+), 24 deletions(-)

diff --git a/imgui.cpp b/imgui.cpp
index b54b86b8b..a53a0ff55 100644
--- a/imgui.cpp
+++ b/imgui.cpp
@@ -1833,37 +1833,41 @@ bool ImGuiTextFilter::Draw(const char* label, float width)
     return value_changed;
 }
 
-void ImGuiTextFilter::TextRange::split(char separator, ImVector<TextRange>& out)
+void ImGuiTextFilter::TextRange::split(char separator, ImVector<TextRange>* out) const
 {
-    out.resize(0);
+    out->resize(0);
     const char* wb = b;
     const char* we = wb;
     while (we < e)
     {
         if (*we == separator)
         {
-            out.push_back(TextRange(wb, we));
+            out->push_back(TextRange(wb, we));
             wb = we + 1;
         }
         we++;
     }
     if (wb != we)
-        out.push_back(TextRange(wb, we));
+        out->push_back(TextRange(wb, we));
 }
 
 void ImGuiTextFilter::Build()
 {
     Filters.resize(0);
     TextRange input_range(InputBuf, InputBuf+strlen(InputBuf));
-    input_range.split(',', Filters);
+    input_range.split(',', &Filters);
 
     CountGrep = 0;
     for (int i = 0; i != Filters.Size; i++)
     {
-        Filters[i].trim_blanks();
-        if (Filters[i].empty())
+        TextRange& f = Filters[i];
+        while (f.b < f.e && ImCharIsBlankA(f.b[0]))
+            f.b++;
+        while (f.e > f.b && ImCharIsBlankA(f.e[-1]))
+            f.e--;
+        if (f.empty())
             continue;
-        if (Filters[i].front() != '-')
+        if (Filters[i].b[0] != '-')
             CountGrep += 1;
     }
 }
@@ -1881,7 +1885,7 @@ bool ImGuiTextFilter::PassFilter(const char* text, const char* text_end) const
         const TextRange& f = Filters[i];
         if (f.empty())
             continue;
-        if (f.front() == '-')
+        if (f.b[0] == '-')
         {
             // Subtract
             if (ImStristr(text, text_end, f.begin()+1, f.end()) != NULL)
diff --git a/imgui.h b/imgui.h
index f627c7dd1..59590f0b0 100644
--- a/imgui.h
+++ b/imgui.h
@@ -1309,6 +1309,14 @@ struct ImGuiOnceUponAFrame
 // Helper: Parse and apply text filters. In format "aaaaa[,bbbb][,ccccc]"
 struct ImGuiTextFilter
 {
+    IMGUI_API           ImGuiTextFilter(const char* default_filter = "");
+    IMGUI_API bool      Draw(const char* label = "Filter (inc,-exc)", float width = 0.0f);    // Helper calling InputText+Build
+    IMGUI_API bool      PassFilter(const char* text, const char* text_end = NULL) const;
+    IMGUI_API void      Build();
+    void                Clear()          { InputBuf[0] = 0; Build(); }
+    bool                IsActive() const { return !Filters.empty(); }
+
+    // [Internal]
     struct TextRange
     {
         const char* b;
@@ -1316,25 +1324,14 @@ struct ImGuiTextFilter
 
         TextRange() { b = e = NULL; }
         TextRange(const char* _b, const char* _e) { b = _b; e = _e; }
-        const char* begin() const { return b; }
-        const char* end() const { return e; }
-        bool empty() const { return b == e; }
-        char front() const { return *b; }
-        static bool is_blank(char c) { return c == ' ' || c == '\t'; }
-        void trim_blanks() { while (b < e && is_blank(*b)) b++; while (e > b && is_blank(*(e-1))) e--; }
-        IMGUI_API void split(char separator, ImVector<TextRange>& out);
+        const char*     begin() const   { return b; }
+        const char*     end () const    { return e; }
+        bool            empty() const   { return b == e; }
+        IMGUI_API void  split(char separator, ImVector<TextRange>* out) const;
     };
-
     char                InputBuf[256];
     ImVector<TextRange> Filters;
     int                 CountGrep;
-
-    IMGUI_API           ImGuiTextFilter(const char* default_filter = "");
-    IMGUI_API bool      Draw(const char* label = "Filter (inc,-exc)", float width = 0.0f);    // Helper calling InputText+Build
-    IMGUI_API bool      PassFilter(const char* text, const char* text_end = NULL) const;
-    IMGUI_API void      Build();
-    void                Clear() { InputBuf[0] = 0; Build(); }
-    bool                IsActive() const { return !Filters.empty(); }
 };
 
 // Helper: Text buffer for logging/accumulating text