Improve metadata saving logic in Item properties and Filter panel

CHANGELOG.md

@@ -25,6 +25,9 @@
   This makes the behaviour consistent with what happens when there are Filter
   panels in the layout.
 
+- The way metadata changes are saved in Item properties and Filter panel was
+  improved. [[#863](https://github.com/reupen/columns_ui/pull/863)]
+
 ### Bug fixes
 
 - Various rendering glitches in Playlist tabs and Tab stack when dark mode is

foo_ui_columns/file_info_utils.cpp

@@ -0,0 +1,71 @@
+#include "pch.h"
+
+#include "file_info_utils.h"
+
+namespace cui::helpers {
+
+namespace {
+
+std::string_view trim_string(std::string_view value)
+{
+    const auto start = value.find_first_not_of(' ');
+    const auto end = value.find_last_not_of(' ');
+
+    if (start > end || start == std::string_view::npos)
+        return ""sv;
+
+    return value.substr(start, end - start + 1);
+}
+
+} // namespace
+
+std::vector<std::string> split_meta_value(std::string_view value)
+{
+    std::vector<std::string> values;
+
+    for (size_t offset{};;) {
+        const size_t index = value.find(";"sv, offset);
+        const auto substr = value.substr(offset, index - offset);
+        const auto trimmed_substr = trim_string(substr);
+
+        if (trimmed_substr.length() > 0)
+            values.emplace_back(trimmed_substr);
+
+        if (index == std::string_view::npos)
+            break;
+
+        offset = index + 1;
+    }
+
+    return values;
+}
+
+std::vector<std::string_view> get_meta_field_values(const file_info& info, std::string_view field)
+{
+    std::vector<std::string_view> values;
+
+    for (const auto index : ranges::views::iota(size_t{}, info.meta_get_count_by_name(field.data()))) {
+        values.emplace_back(info.meta_get(field.data(), index));
+    }
+
+    return values;
+}
+
+bool SingleFieldFileInfoFilter::apply_filter(metadb_handle_ptr p_location, t_filestats p_stats, file_info& p_info)
+{
+    auto old_values = get_meta_field_values(p_info, m_field);
+    std::vector<std::string_view> new_values;
+    ranges::push_back(new_values, m_new_values);
+
+    if (old_values == new_values)
+        return false;
+
+    p_info.meta_remove_field(m_field.data());
+
+    for (auto&& value : m_new_values)
+        p_info.meta_add_ex(m_field.data(), m_field.length(), value.data(), value.length());
+
+    return true;
+}
+
+} // namespace cui::helpers

foo_ui_columns/file_info_utils.h

@@ -0,0 +1,23 @@
+#pragma once
+
+namespace cui::helpers {
+
+std::vector<std::string> split_meta_value(std::string_view value);
+
+std::vector<std::string_view> get_meta_field_values(const file_info& info, std::string_view field);
+
+class SingleFieldFileInfoFilter : public file_info_filter {
+public:
+    SingleFieldFileInfoFilter(std::string field, std::vector<std::string> new_values)
+        : m_field(std::move(field))
+        , m_new_values(std::move(new_values))
+    {
+    }
+
+    bool apply_filter(metadb_handle_ptr p_location, t_filestats p_stats, file_info& p_info) override;
+
+    std::string m_field;
+    std::vector<std::string> m_new_values;
+};
+
+} // namespace cui::helpers

foo_ui_columns/filter.cpp

@@ -913,9 +913,6 @@ pfc::list_t<FieldData> FilterPanel::g_field_data;
 
 pfc::list_t<FilterStream::ptr> FilterPanel::g_streams;
 
-// {4D6774AF-C292-44ac-8A8F-3B0855DCBDF4}
-const GUID AppearanceClient::g_guid = {0x4d6774af, 0xc292, 0x44ac, {0x8a, 0x8f, 0x3b, 0x8, 0x55, 0xdc, 0xbd, 0xf4}};
-
 namespace {
 colours::client::factory<AppearanceClient> g_appearance_client_impl;
 }

foo_ui_columns/filter.h

@@ -6,9 +6,9 @@ namespace cui::panels::filter {
 
 class AppearanceClient : public colours::client {
 public:
-    static const GUID g_guid;
+    static constexpr GUID id{0x4d6774af, 0xc292, 0x44ac, {0x8a, 0x8f, 0x3b, 0x8, 0x55, 0xdc, 0xbd, 0xf4}};
 
-    const GUID& get_client_guid() const override { return g_guid; }
+    const GUID& get_client_guid() const override { return id; }
     void get_name(pfc::string_base& p_out) const override { p_out = "Filter panel"; }
     uint32_t get_supported_colours() const override { return colours::colour_flag_all; }
     uint32_t get_supported_bools() const override

foo_ui_columns/filter_inline_edit.cpp

@@ -27,52 +27,35 @@ bool FilterPanel::notify_create_inline_edit(const pfc::list_base_const_t<size_t>
 }
 void FilterPanel::notify_save_inline_edit(const char* value)
 {
-    const auto tagger_api = metadb_io_v2::get();
-    {
-        metadb_handle_list ptrs(m_edit_handles);
-        pfc::list_t<file_info_impl> infos;
-        pfc::list_t<bool> mask;
-        pfc::list_t<const file_info*> infos_ptr;
-        size_t count = ptrs.get_count();
-        mask.set_count(count);
-        infos.set_count(count);
-        // infos.set_count(count);
-        for (size_t i = 0; i < count; i++) {
-            assert(ptrs[i].is_valid());
-            mask[i] = !ptrs[i]->get_info(infos[i]);
-            infos_ptr.add_item(&infos[i]);
-            if (!mask[i]) {
-                bool b_remove = true;
-                size_t jcount = m_edit_fields.size();
-                for (size_t j = 0; j < jcount; j++) {
-                    size_t field_index = infos[i].meta_find(m_edit_fields[j]);
-                    if (field_index != pfc_infinite) {
-                        size_t field_count = infos[i].meta_enum_value_count(field_index);
+    auto apply_filter = [edit_fields = m_edit_fields, edit_previous_value = m_edit_previous_value,
+                            value = std::string{value}](trackRef location, t_filestats stats, file_info& info) -> bool {
+        bool changed = false;
 
-                        for (size_t k = 0; k < field_count; k++) {
-                            const char* ptr = infos[i].meta_enum_value(field_index, k);
-                            if (((!ptr && m_edit_previous_value.is_empty())
-                                    || !stricmp_utf8(m_edit_previous_value, ptr))
-                                && strcmp(value, ptr) != 0) {
-                                infos[i].meta_modify_value(field_index, k, value);
-                                b_remove = false;
-                            }
-                        }
-                    }
+        for (auto& field : edit_fields) {
+            const size_t field_index = info.meta_find(field);
+
+            if (field_index == std::numeric_limits<size_t>::max())
+                continue;
+
+            size_t value_count = info.meta_enum_value_count(field_index);
+
+            for (auto value_index : std::ranges::views::iota(size_t{}, value_count)) {
+                auto field_value = info.meta_enum_value(field_index, value_index);
+
+                if (!stricmp_utf8(edit_previous_value, field_value) && strcmp(value.c_str(), field_value) != 0) {
+                    info.meta_modify_value(field_index, value_index, value.c_str());
+                    changed = true;
                 }
-                mask[i] = b_remove;
             }
         }
-        infos_ptr.remove_mask(mask.get_ptr());
-        ptrs.remove_mask(mask.get_ptr());
 
-        {
-            service_ptr_t<file_info_filter_impl> filter = new service_impl_t<file_info_filter_impl>(ptrs, infos_ptr);
-            tagger_api->update_info_async(ptrs, filter, GetAncestor(get_wnd(), GA_ROOT),
-                metadb_io_v2::op_flag_no_errors | metadb_io_v2::op_flag_background | metadb_io_v2::op_flag_delay_ui,
-                nullptr);
-        }
-    }
+        return changed;
+    };
+
+    auto filter = file_info_filter::create(std::move(apply_filter));
+
+    metadb_io_v2::get()->update_info_async(m_edit_handles, filter, GetAncestor(get_wnd(), GA_ROOT),
+        metadb_io_v2::op_flag_no_errors | metadb_io_v2::op_flag_background | metadb_io_v2::op_flag_delay_ui, nullptr);
 }
 void FilterPanel::notify_exit_inline_edit()
 {

foo_ui_columns/foo_ui_columns.vcxproj

@@ -266,6 +266,7 @@
     <ClCompile Include="dark_mode_active_ui.cpp" />
     <ClCompile Include="dark_mode_dialog.cpp" />
     <ClCompile Include="dark_mode_spin.cpp" />
+    <ClCompile Include="file_info_utils.cpp" />
     <ClCompile Include="font_manager.cpp" />
     <ClCompile Include="gdi.cpp" />
     <ClCompile Include="icons.cpp" />
@@ -440,6 +441,7 @@
     <ClInclude Include="dark_mode_active_ui.h" />
     <ClInclude Include="dark_mode_spin.h" />
     <ClInclude Include="event_token.h" />
+    <ClInclude Include="file_info_utils.h" />
     <ClInclude Include="font_manager_data.h" />
     <ClInclude Include="gdi.h" />
     <ClInclude Include="gdiplus.h" />

foo_ui_columns/foo_ui_columns.vcxproj.filters

@@ -611,6 +611,9 @@
     <ClCompile Include="ng_playlist\ng_playlist_config.cpp">
       <Filter>Playlist view</Filter>
     </ClCompile>
+    <ClCompile Include="file_info_utils.cpp">
+      <Filter>Utilities</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="resource.h">
@@ -890,6 +893,9 @@
     <ClInclude Include="core_drop_down_list_toolbar.h">
       <Filter>Utilities</Filter>
     </ClInclude>
+    <ClInclude Include="file_info_utils.h">
+      <Filter>Utilities</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <None Include=".clang-format" />