From 92c518a420051dc5e0fb5a044868740241afc9db Mon Sep 17 00:00:00 2001
From: ocornut <omarcornut@gmail.com>
Date: Thu, 19 Nov 2015 23:09:59 +0100
Subject: [PATCH] InputText: Added password mode via
 ImGuiInputTextFlags_Password (#237, #363, #374)

---
 imgui.cpp        | 25 +++++++++++++++++++++++--
 imgui.h          |  1 +
 imgui_demo.cpp   |  7 +++++++
 imgui_internal.h |  1 +
 4 files changed, 32 insertions(+), 2 deletions(-)

diff --git a/imgui.cpp b/imgui.cpp
index e39f03bb..abd26fcc 100644
--- a/imgui.cpp
+++ b/imgui.cpp
@@ -7121,6 +7121,7 @@ bool ImGui::InputTextEx(const char* label, char* buf, int buf_size, const ImVec2
     const ImGuiID id = window->GetID(label);
     const bool is_multiline = (flags & ImGuiInputTextFlags_Multiline) != 0;
     const bool is_editable = (flags & ImGuiInputTextFlags_ReadOnly) == 0;
+    const bool is_password = (flags & ImGuiInputTextFlags_Password) != 0;
 
     ImVec2 label_size = ImGui::CalcTextSize(label, NULL, true);
     ImVec2 size = CalcItemSize(size_arg, CalcItemWidth(), is_multiline ? ImGui::GetTextLineHeight() * 8.0f : label_size.y); // Arbitrary default of 8 lines high for multi-line
@@ -7148,6 +7149,23 @@ bool ImGui::InputTextEx(const char* label, char* buf, int buf_size, const ImVec2
             return false;
     }
 
+    // Password pushes a temporary font with only a fallback glyph
+    if (is_password)
+    {
+        const ImFont::Glyph* glyph = g.Font->FindGlyph('*');
+        ImFont* password_font = &g.InputTextPasswordFont;
+        password_font->FontSize = g.Font->FontSize;
+        password_font->Scale = g.Font->Scale;
+        password_font->DisplayOffset = g.Font->DisplayOffset;
+        password_font->Ascent = g.Font->Ascent;
+        password_font->Descent = g.Font->Descent;
+        password_font->ContainerAtlas = g.Font->ContainerAtlas;
+        password_font->FallbackGlyph = glyph;
+        password_font->FallbackXAdvance = glyph->XAdvance;
+        IM_ASSERT(password_font->Glyphs.empty() && password_font->IndexXAdvance.empty() && password_font->IndexLookup.empty());
+        ImGui::PushFont(password_font);
+    }
+
     // NB: we are only allowed to access 'edit_state' if we are the active widget.
     ImGuiTextEditState& edit_state = g.InputTextState;
 
@@ -7318,7 +7336,7 @@ bool ImGui::InputTextEx(const char* label, char* buf, int buf_size, const ImVec2
         else if (is_ctrl_only && IsKeyPressedMap(ImGuiKey_Z) && is_editable)    { edit_state.OnKeyPressed(STB_TEXTEDIT_K_UNDO); edit_state.ClearSelection(); }
         else if (is_ctrl_only && IsKeyPressedMap(ImGuiKey_Y) && is_editable)    { edit_state.OnKeyPressed(STB_TEXTEDIT_K_REDO); edit_state.ClearSelection(); }
         else if (is_ctrl_only && IsKeyPressedMap(ImGuiKey_A))                   { edit_state.SelectAll(); edit_state.CursorFollow = true; }
-        else if (is_ctrl_only && ((IsKeyPressedMap(ImGuiKey_X) && is_editable) || IsKeyPressedMap(ImGuiKey_C)) && (!is_multiline || edit_state.HasSelection()))
+        else if (is_ctrl_only && !is_password && ((IsKeyPressedMap(ImGuiKey_X) && is_editable) || IsKeyPressedMap(ImGuiKey_C)) && (!is_multiline || edit_state.HasSelection()))
         {
             // Cut, Copy
             const bool cut = IsKeyPressedMap(ImGuiKey_X);
@@ -7623,8 +7641,11 @@ bool ImGui::InputTextEx(const char* label, char* buf, int buf_size, const ImVec2
         ImGui::EndGroup();
     }
 
+    if (is_password)
+        ImGui::PopFont();
+
     // Log as text
-    if (g.LogEnabled)
+    if (g.LogEnabled && !is_password)
         LogRenderedText(render_pos, buf, NULL);
 
     if (label_size.x > 0)
diff --git a/imgui.h b/imgui.h
index db5af06a..aa56643b 100644
--- a/imgui.h
+++ b/imgui.h
@@ -490,6 +490,7 @@ enum ImGuiInputTextFlags_
     ImGuiInputTextFlags_NoHorizontalScroll  = 1 << 12,  // Disable following the cursor horizontally
     ImGuiInputTextFlags_AlwaysInsertMode    = 1 << 13,  // Insert mode
     ImGuiInputTextFlags_ReadOnly            = 1 << 14,  // Read-only mode
+    ImGuiInputTextFlags_Password            = 1 << 15,  // Password mode, display all characters as '*'
     // [Internal]
     ImGuiInputTextFlags_Multiline           = 1 << 20   // For internal use by InputTextMultiline()
 };
diff --git a/imgui_demo.cpp b/imgui_demo.cpp
index 71aca37d..559e81f5 100644
--- a/imgui_demo.cpp
+++ b/imgui_demo.cpp
@@ -417,6 +417,13 @@ void ImGui::ShowTestWindow(bool* opened)
             static char buf5[64] = ""; ImGui::InputText("no blank", buf5, 64, ImGuiInputTextFlags_CharsNoBlank);
             struct TextFilters { static int FilterImGuiLetters(ImGuiTextEditCallbackData* data) { if (data->EventChar < 256 && strchr("imgui", (char)data->EventChar)) return 0; return 1; } };
             static char buf6[64] = ""; ImGui::InputText("\"imgui\" letters", buf6, 64, ImGuiInputTextFlags_CallbackCharFilter, TextFilters::FilterImGuiLetters);
+
+            ImGui::Text("Password input");
+            static char bufpass[64] = "password123"; 
+            ImGui::InputText("password", bufpass, 64, ImGuiInputTextFlags_Password);
+            ImGui::SameLine(); ShowHelpMarker("Display all characters as '*'.\nDisable clipboard cut and copy.\nDisable logging.\n");
+            ImGui::InputText("password (clear)", bufpass, 64);
+
             ImGui::TreePop();
         }
 
diff --git a/imgui_internal.h b/imgui_internal.h
index 4a4b8478..a70e3caf 100644
--- a/imgui_internal.h
+++ b/imgui_internal.h
@@ -395,6 +395,7 @@ struct ImGuiState
 
     // Widget state
     ImGuiTextEditState      InputTextState;
+    ImFont                  InputTextPasswordFont;
     ImGuiID                 ScalarAsInputTextId;                // Temporary text input when CTRL+clicking on a slider, etc.
     ImGuiStorage            ColorEditModeStorage;               // Store user selection of color edit mode
     ImVec2                  ActiveClickDeltaToCenter;